Does the P20 Pro work in the US on T-Mobile with VoLTE? - Huawei P20 Pro Questions & Answers

Does VoLTE work on T-MOBILE in the USA on P20 Pro out of the box?

KevinAce said:
Does VoLTE work on T-MOBILE in the USA on P20 Pro out of the box?
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Yes it does.

gadget8888 said:
Yes it does.
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Where has this been confirmed?

Screenshot or it didn't happen ?

https://photos.app.goo.gl/cyBqpxXvuIhNUPwn1

gadget8888 said:
https://photos.app.goo.gl/cyBqpxXvuIhNUPwn1
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This doesn't mean anything.
Can you post screenshot while making a phone call if it shows LTE or drops to H+??

Does wifi calling work?

An update on this matter...
As far as I can tell Huawei has been fixing one of their shortcomings and allowing VoLTE support on many more carriers despite the phone being the wrong reason.
I've heard from a reliable source that, although I didn't think it was true, indeed VoLTE works on T-Mobile US.
Note that this may or may not depend on the version/branding of the P20 Pro.
Wifi calling does not and has never worked on T-Mobile US with Huawei phones unfortunately.

This guy gets VOLTE on tmobile:
https://www.youtube.com/watch?v=pIqKuE1Dx40

as best I can tell it works.. I make a call and band 12 stays connected throughout the call when VOLTE is enabled in settings.

Does 4G symbol remain while on call
deejaylewlew said:
as best I can tell it works.. I make a call and band 12 stays connected throughout the call when VOLTE is enabled in settings.
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Can you try this please?
1. Turn WiFi off.
2. Make sure 4G symbol is showing on your cellular bars at the top of the screen.
3. Make a phone call. You can even call 611 for T-MO customer service, and make sure that 4G symbol still remains while on the call and that it does not change to 3G or anything else? And if you can post a screenshot, it would be much appreciated.
Are you using the CLT-L29 and what region? European or Latin American version?

KevinAce said:
Can you try this please?
1. Turn WiFi off.
2. Make sure 4G symbol is showing on your cellular bars at the top of the screen.
3. Make a phone call. You can even call 611 for T-MO customer service, and make sure that 4G symbol still remains while on the call and that it does not change to 3G or anything else? And if you can post a screenshot, it would be much appreciated.
Are you using the CLT-L29 and what region? European or Latin American version?
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Correct it's the dual sim CLT-L29 Build Number is clt l29 8.1.0.106(c636)
That method of testing would be a step backward. I have already confirmed I am calling over Band 12. VOLTE is working, atleast for me on T-Mobile. I wasn't expecting it to from reviews but it was a nice surprise.

Thanks
deejaylewlew said:
Correct it's the dual sim CLT-L29 Build Number is clt l29 8.1.0.106(c636)
That method of testing would be a step backward. I have already confirmed I am calling over Band 12. VOLTE is working, atleast for me on T-Mobile. I wasn't expecting it to from reviews but it was a nice surprise.
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I see your point and thank you so much for the info. Out of curiosity, are there WiFi calling settings showing up or no? That would be a double bonus.

KevinAce said:
I see your point and thank you so much for the info. Out of curiosity, are there WiFi calling settings showing up or no? That would be a double bonus.
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No go on the WiFi calling, no settings for it.

WiFi calling
deejaylewlew said:
No go on the WiFi calling, no settings for it.
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A workaround to get WiFi calling is to download T-Mobile Digits from play store and you can use the app to make wifi calls. You may need to sign up for T-MOBILE Digits. I'm not sure. I was a beta tester for Digits and they since let me keep the service for free on 3 devices.

KevinAce said:
A workaround to get WiFi calling is to download T-Mobile Digits from play store and you can use the app to make wifi calls. You may need to sign up for T-MOBILE Digits. I'm not sure. I was a beta tester for Digits and they since let me keep the service for free on 3 devices.
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I've been using google voice / hangouts dialer (or whatever they want to call it this month) for a few years now. I hardly ever use T-mobile for calls, works out well when you want an international phone. Less reliance on the network features.
Out of curiosity do you remember if T-Mobile digits worked for incoming calls as well?

Digits
deejaylewlew said:
I've been using google voice / hangouts dialer (or whatever they want to call it this month) for a few years now. I hardly ever use T-mobile for calls, works out well when you want an international phone. Less reliance on the network features.
Out of curiosity do you remember if T-Mobile digits worked for incoming calls as well?
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Yes it does work. And the fact that you can mimic one number or multiple numbers as many times as you'd like on multiple devices is pretty cool.

brother phone NEO-L29 Mate RS dual sim with sim t-mobile.pl i have options to VoLTE and WIFI calling

VoLTE definitely works and Wificalling menu is hidden. Don't think it works, yet but that might change at some point. Use a program like quickshortcutmaker and search for calling. The last option seems to be for att and the second from bottom is TMobile.
Sent from my CLT-L09 using Tapatalk

International
apol said:
brother phone NEO-L29 Mate RS dual sim with sim t-mobile.pl i have options to VoLTE and WIFI calling
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Click to collapse
I believe that's because you are using an international phone in an international country on an international version of T-MO.

Related

[UNLOCKED - AT&T] Enable VoLTE, Video Calling, WiFi Calling and more?

My phone: Samsung Unlocked variant running on AT&T
Using a dialer code I've found an app "Testing" that shows options to enable the VoLTE, Video Calling, WiFi Calling & I'm able to pick network type (GSM, UTMS, LTE, ect.) Some options work and some don't. Maybe somebody smarter than me can look into this and possibly enable 4G LTE on AT&T, as well as the other features?
Code: *#*#4636#*#*
Awesome..thanks
have you tried calling at&t and asked about adding your imei for them to enable those on your device.
Thats what i have read online that tech support from at&t can make this service works with unlocked note 8.
Im still waiting for my Unlocked Note 8 and wondering how to enable Volte (HD voice). i dont use wifi calling that much though.
Genesis730 said:
My phone: Samsung Unlocked variant running on AT&T
Using a dialer code I've found an app "Testing" that shows options to enable the VoLTE, Video Calling, WiFi Calling & I'm able to pick network type (GSM, UTMS, LTE, ect.) Some options work and some don't. Maybe somebody smarter than me can look into this and possibly enable 4G LTE on AT&T, as well as the other features?
Code: *#*#4636#*#*
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Click to collapse
Do any of those options actually work for you?
apascual89 said:
Do any of those options actually work for you?
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Changing networks does change my connection from 3G to HSPAP to no connection, depending on the option. The VoLTE, Video Calling & WiFi calling are temporarily enabled but then turn back off. Likely provisioning issue but that's all i can tell.
raffstyle said:
have you tried calling at&t and asked about adding your imei for them to enable those on your device.
Thats what i have read online that tech support from at&t can make this service works with unlocked note 8.
Im still waiting for my Unlocked Note 8 and wondering how to enable Volte (HD voice). i dont use wifi calling that much though.
Click to expand...
Click to collapse
I have and they advised there's no issue. They can't seem to figure it out but I've spent several hours and multiple calls trying to determine if it's an issue or the way things will be.
The only interesting thing they advised of that there's no device description on my account. (Typically it'll at least say Samsung Note8 got example but they see nothing) IMEI and SIM were updated upon activation.
unless something has changed recently, you have to have an ATT phone for all of these features to work. i can only get HDVoice (VoLTE) working on my Note Fan Edition and my wife's S8+, both of which are Exynos devices. I had to call ATT and (a) have them assign the IMEI of an ATT phone (S7 Edge and S7 Edge +) to each account and (b) by flashing an ATT CSC (from a Snapdragon ATT S8+) to the Note Fan Edition and the S8+. The ATT CSC's enable options for Wifi calling and video calling, but these features aren't working on either phone.
Hows your data speed? Do you get 4G LTE speed data?
coz you said your connection is going from 3G to HSPA+
raffstyle said:
Hows your data speed? Do you get 4G LTE speed data?
coz you said your connection is going from 3G to HSPA+
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I average just under 5 Mb/s (Megabits, not megabytes which is about .5 MB/s) on H+ Latest test was 4.6 Mb/s
I do not get LTE, but am in a heavy LTE area (Phoenix, AZ) and get solid consistent LTE on my Note 5
Genesis730 said:
I average just under 5 Mb/s (Megabits, not megabytes which is about .5 MB/s) on H+ Latest test was 4.6 Mb/s
I do not get LTE, but am in a heavy LTE area (Phoenix, AZ) and get solid consistent LTE on my Note 5
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Click to collapse
WOW thats totally sucks! Im now worried about my preorder.
I might have to cancel my order from samsung and get an At&t brand note 8. I hope this is only a temporary problem with unlocked note users.
Thanks for all the info! good luck on getting all those at&t services.
raffstyle said:
WOW thats totally sucks! Im now worried about my preorder.
I might have to cancel my order from samsung and get an At&t brand note 8. I hope this is only a temporary problem with unlocked note users.
Thanks for all the info! good luck on getting all those at&t services.
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I have an unlocked note 8 with an AT&T sim. I get great LTE speeds. In the city I get 100 plus Mbs at home or in the country I still get about 20 with only 2 bars of LTE i am only missing VoLTE and wifi calling
I'm hoping it's a setting issue on their end or something. I'm continuing to find a knowledgeable AT&T rep with some info. Good to know the unlocked version gets good LTE speeds. I'll get a new SIM and continue to look for a resolution. Worst case I'll flash radios as that looks like it's a developing option.
I gave up trying to jump through hoops to get WiFi calling and VoLTE and just bought the dang AT&T version when I preordered... If someone could come up with an easy way to get it all with an unlocked version...I'd be tempted to jump on it but until then, I'm stuck with the AT&T load.
chrisusa96 said:
I have an unlocked note 8 with an AT&T sim. I get great LTE speeds. In the city I get 100 plus Mbs at home or in the country I still get about 20 with only 2 bars of LTE i am only missing VoLTE and wifi calling
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Did you just put your old sim to your phone or did you call/went to at&t to get a new sim and add your imei to at&t system ??
raffstyle said:
Did you just put your old sim to your phone or did you call/went to at&t to get a new sim and add your imei to at&t system ??
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Added old sim I did call them to add features but was trying to get wifi calling
chrisusa96 said:
Added old sim I did call them to add features but was trying to get wifi calling
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What did you say when you called them?
borijess said:
What did you say when you called them?
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That I wanted to be able to use wifi calling and it doesn't work. The went through and made sure all features were enabled.
I have spoken with multiple AT&T reps and after speaking with someone ('ha-seen' is how it sounded) who said that they were with the Level 3 team I was told that video and wifi calling are all proprietary to AT&T and that you have to have a branded phone with their build and that the unlocked version would not have access to this.
Beianrui said:
I have spoken with multiple AT&T reps and after speaking with someone ('ha-seen' is how it sounded) who said that they were with the Level 3 team I was told that video and wifi calling are all proprietary to AT&T and that you have to have a branded phone with their build and that the unlocked version would not have access to this.
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Click to collapse
I got the same answer. I am calling and complaining to Samsung, I mean I pay to use the AT&T network and the features and the phone is capable of both volte and wifi calling there should be an easy way to fix this.
Just picked up the Note 8 U1 for use on AT&T, switching from a S8+ that was AT&T unlocked. I don't use WiFi calling, advanced messaging was cool but not having it won't hurt, I think. VOLTE is the big question, I know it's voice over LTE but how will that effect me talking and surfing the web at the same time?
JGuinan007 said:
I got the same answer. I am calling and complaining to Samsung, I mean I pay to use the AT&T network and the features and the phone is capable of both volte and wifi calling there should be an easy way to fix this.
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I just use alternative app like Duo from Google Play Store. It works with or without WiFi and the app is make by Google

Sprint User - advisable to get unlocked model?

I've been reading about all the Note 8's (Snapdragon) being the same hardware but different firmwares which can be flashed vice-versa. I'll assume the ESN/MEID of the unlocked models are in Sprint's database. (Still have nightmares trying to activate a Nexus 6P with Sprint)
I'm wondering if it is worth it to get the unlocked model and then flash/ODIN the Sprint firmware (for Wifi-Calling/Calling Plus, and VoLTE, etc).
Why go through this? If I can get the unlocked model cheaper than the Sprint branded version, is it worth it?
I'm on unlocked note 8 with sprint. Activation was simple. easy and no trouble. I do have wifi calling.
krazieboy said:
I'm on unlocked note 8 with sprint. Activation was simple. easy and no trouble. I do have wifi calling.
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Did you flash the Sprint firmware for WiFi calling or just the way it came out the box?
LordLugard said:
Did you flash the Sprint firmware for WiFi calling or just the way it came out the box?
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As soon as the SIM activates, WiFi calling enables...as soon as LTE Calling is available, I bet we get it too...could be mistaken though...
LordLugard said:
Did you flash the Sprint firmware for WiFi calling or just the way it came out the box?
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out of the box.
krazieboy said:
I'm on unlocked note 8 with sprint. Activation was simple. easy and no trouble. I do have wifi calling.
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How are you getting voicemail? Without the sprint visual voicemail app, do you have to dial into your own number or hold "1" in the dialer to check ur messages?
Bang321 said:
How are you getting voicemail? Without the sprint visual voicemail app, do you have to dial into your own number or hold "1" in the dialer to check ur messages?
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I used *73mygooglevoicenumber to forward no answer service to Google voice...I like the transcriptions
BlueFox721 said:
I used *73mygooglevoicenumber to forward no answer service to Google voice...I like the transcriptions
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That works terrifically. Thanks!
BlueFox721 said:
I used *73mygooglevoicenumber to forward no answer service to Google voice...I like the transcriptions
Click to expand...
Click to collapse
*73 works but FYI it forwards calls after 23 seconds or if you hit END
*28 is what gvoice recommends which forwards on no answer or busy.
Almost the same thing but you get the busy signal forward as well as when it goes to voicemail with 28. 73 is more of a timeout or on reject.
centran said:
*73 works but FYI it forwards calls after 23 seconds or if you hit END
*28 is what gvoice recommends which forwards on no answer or busy.
Almost the same thing but you get the busy signal forward as well as when it goes to voicemail with 28. 73 is more of a timeout or on reject.
Click to expand...
Click to collapse
Right on...I'll have to do that then...the website said *28 was no longer being used for no answer and th at *73 replaced it...I'll check it out anyways..
I use Google voice on my unlocked note 8. I get a text whenever i get a new voicemail
Ordered Unlocked on OCT 3rd for Sprint, coming with SIM card, so i assume once its activated that ill get the WIFI Calling, but whatabout HD voice and VOLTE?? Its already in BETA on my wifes S8, THanks
urirx98 said:
Ordered Unlocked on OCT 3rd for Sprint, coming with SIM card, so i assume once its activated that ill get the WIFI Calling, but whatabout HD voice and VOLTE?? Its already in BETA on my wifes S8, THanks
Click to expand...
Click to collapse
Most likely might need to flash Sprint firmware to get Sprint network specific features ...
urirx98 said:
Ordered Unlocked on OCT 3rd for Sprint, coming with SIM card, so i assume once its activated that ill get the WIFI Calling, but whatabout HD voice and VOLTE?? Its already in BETA on my wifes S8, THanks
Click to expand...
Click to collapse
Sprint WiFi calling already works on unlocked version...for VoIP we are waiting for update...Sprint will enable provisioning for your imei if you call them...mine is enabled awaiting the VoIP update when released...Verizon and AT&T are the only ones having issues with WiFi calling and VoLTE...Video calling is not even offered by Sprint
My unlocked on Sprint has:
Download Booster
WiFi Calling
Hotspot (shortcut master lite method)
HD voice (shortcut master lite enable enhanced lte)
VoIP (provisioned by Sprint but awaiting app (like Sprint's WFC for WiFi calling) to be installed in future update to work)
VVM by Google Voice (Sprint VVM needs root and build prop edit with required files pushed to system folders)
No Video Calling will be available because Sprint and Google agreed for Google duo....which is sometimes better anyways
Duo does work great, have tried with both my wife and father ( both have s8s) . I got email today that my Sprint SIM CARD was shipped but the phone is still on backorder, errrr. Hoping to get update in few days since when i bought it said would be shipped after the 15th.. FINGERS CROSSED!!!
Ps, did you have to do anything to the phone to get the wificalling or hotspot working?? I have hotspot on my sprint plan so i plan on using it for tablets for the kids., and deff want VOLTE when its ready
WG
BlueFox721 said:
Sprint WiFi calling already works on unlocked version...for VoIP we are waiting for update...Sprint will enable provisioning for your imei if you call them...mine is enabled awaiting the VoIP update when released...Verizon and AT&T are the only ones having issues with WiFi calling and VoLTE...Video calling is not even offered by Sprint
My unlocked on Sprint has:
Download Booster
WiFi Calling
Hotspot (shortcut master lite method)
HD voice (shortcut master lite enable enhanced lte)
VoIP (provisioned by Sprint but awaiting app (like Sprint's WFC for WiFi calling) to be installed in future update to work)
VVM by Google Voice (Sprint VVM needs root and build prop edit with required files pushed to system folders)
No Video Calling will be available because Sprint and Google agreed for Google duo....which is sometimes better anyways
Click to expand...
Click to collapse
urirx98 said:
Duo does work great, have tried with both my wife and father ( both have s8s) . I got email today that my Sprint SIM CARD was shipped but the phone is still on backorder, errrr. Hoping to get update in few days since when i bought it said would be shipped after the 15th.. FINGERS CROSSED!!!
Ps, did you have to do anything to the phone to get the wificalling or hotspot working?? I have hotspot on my sprint plan so i plan on using it for tablets for the kids., and deff want VOLTE when its ready
WG
Click to expand...
Click to collapse
Nothing for WiFi calling... shortcut master lite for hotspot
Just got my phone and can not find WIFI CALLING on it. I do not have a setting for ADVANCED CALLING which all the sites are telling me to go to , let me know where you found it, thanks

update to 8.1 breaks calling the voicemail number (1233) on tele2/tmobile network

So after the official oreo update , my wife's nokia 8 cannot call the voicemail number any more. Last week it worked. Sim in another phone, it works. Dialing on the updated nokia 8, 'this number is not available'.
Can't find anything on the internet, so checking here if somebody knows what could be the issue here.
Any services that handles this 1233 calling differently then any other number?
Any hint or 'look at this option' will be appreciated as i'm pretty stuck and even tele2 customer service has no clue ofcourse.
I'm on Tele2 nl and have the same issue. I don't know what the solution is. Let's hope for a fast fix.
Edit: a temporary ghettofix is to disable advanced lte mode (geoptimaliseerde 4G LTE modus) in mobile network in the settings menu.
yeah just figured that one too. Fiddled first with 4g/3g/2g settings which made it work too. Turning off VoLTE indeed made it also work on the 4G preferred network mode
Apb said:
yeah just figured that one too. Fiddled first with 4g/3g/2g settings which made it work too. Turning off VoLTE indeed made it also work on the 4G preferred network mode
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It seems that Tele2 switched to full LTE since last week, whereas before it only used VoLTE in some cases.
It could be that they forgot to register their number. I assume that the other phone you used to test does not use VoLTE?
ikkefc3 said:
It seems that Tele2 switched to full LTE since last week, whereas before it only used VoLTE in some cases.
It could be that they forgot to register their number. I assume that the other phone you used to test does not use VoLTE?
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Click to collapse
interesting, is there any article that mentions the date? Too me its a bit too coincidental that it happen the same time as Oreo update
Apb said:
interesting, is there any article that mentions the date? Too me its a bit too coincidental that it happen the same time as Oreo update
Click to expand...
Click to collapse
No, but I tested in situations that didn't give me volte before, but now they do.

Pair 10 pro with AT&T Number Sync successful

So sorry if this was common knowledge but I haven't seen anything on this yet so I thought I'd share. I decided to try setting up AT&T's number sync between my new mate 10 pro and my LG Sport and it worked. What makes that amazing is this is the first non att branded phone I have ever been able to set up directly between the phone and a att smartwatch that didn't require me using a att branded smartphone in the middle. You can't find the ability to do it through the my att app or website but if you initiate through the watch, it will open the browser on your phone and then give you a number sync code, once you log in through the browser, you put in the code and then accept terms and it will successfully link. This phone also seems to work well with the LG Sport. Battery life is waaay better then when it's paired to my Att Note 8.
FYI, Att number sync allows multiple devices to receive a phone call or text message from the main line they are tied to. That way every thing is seen from one number. One of the requirements is that the phone must be Att branded.
So that tells me between this and VoLTE working on att with this phone, this phone was all but ready for att network and only thing missing was the att branding on the phone before att backed out.
Sorry if long l, just wanted to share to maybe help other att users.
Have you been able to get/verify that VoLTE is working on your mate 10 Pro? If yes, how did you verify it works? I have a Dual Sim 10 Pro rebranded to the US 10 Pro (did at Best Buy) with the Enhanced Voice and VoLTE options enabled. Thanks.
Sent from my SM-N950F using Tapatalk
I didn't use the default apn that sets up when I had my att sim inserted. I used the settings from att's support page: https://www.att.com/esupport/article.html#!/wireless/KM1218306
If I remember, there were a few subtle differences. Honestly, I didn't notice if VoLTE was working before the new apn settings but I see that it works for sure with the new apn settings. My status doesn't change from LTE whether on call and/or browsing.
ILuvRice said:
I didn't use the default apn that sets up when I had my att sim inserted. I used the settings from att's support page: https://www.att.com/esupport/article.html#!/wireless/KM1218306
If I remember, there were a few subtle differences. Honestly, I didn't notice if VoLTE was working before the new apn settings but I see that it works for sure with the new apn settings. My status doesn't change from LTE whether on call and/or browsing.
Click to expand...
Click to collapse
well, not working for me... i used an app to validate data connection during phone call and when connected to a call, data drops to HSPA+.
d.cortez said:
well, not working for me... i used an app to validate data connection during phone call and when connected to a call, data drops to HSPA+.
Click to expand...
Click to collapse
Hmmm...visually the LTE symbol dosesnt change and I think it sounds like it should. What's the app you used? I'll check and see if I get the same thing.
ILuvRice said:
Hmmm...visually the LTE symbol dosesnt change and I think it sounds like it should. What's the app you used? I'll check and see if I get the same thing.
Click to expand...
Click to collapse
I use Network Cell Lite to check connectivity when on a phone call.
d.cortez said:
I use Network Cell Lite to check connectivity when on a phone call.
Click to expand...
Click to collapse
So I made a phone call with the app running and it showed under the raw tab:
Voice NW: LTE
Data NW: LTE+
So I'm guessing its working.
ILuvRice said:
So I made a phone call with the app running and it showed under the raw tab:
Voice NW: LTE
Data NW: LTE+
So I'm guessing its working.
Click to expand...
Click to collapse
yep, that's an indication it's working; time to call ATT. Thanks for checking.
d.cortez said:
yep, that's an indication it's working; time to call ATT. Thanks for checking.
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Click to collapse
No problem. I was thinking, you said you rebranded to us but I wonder if by a slim chance there is some hardware difference that is dectected? Like maybe a certain band att uses. I haven't looked at the differenceces in bands between models.
ILuvRice said:
No problem. I was thinking, you said you rebranded to us but I wonder if by a slim chance there is some hardware difference that is dectected? Like maybe a certain band att uses. I haven't looked at the differenceces in bands between models.
Click to expand...
Click to collapse
Cellular bands are the same as US version; when not in a call I connect to LTE+. I can achieve cellular download speeds of 98 Mbps. Main difference between US version and mine is my phone is dual SIM Mate 10 Pro. The second SIM connects to 4G when I make a call. If I use only 1 SIM, connection drops to HSPA+. I see an option to enable VoLTE on the second SIM, but it's disabled. Have you to find a way to enable it. I appreciate your feedback, thanks again.
d.cortez said:
Cellular bands are the same as US version; when not in a call I connect to LTE+. I can achieve cellular download speeds of 98 Mbps. Main difference between US version and mine is my phone is dual SIM Mate 10 Pro. The second SIM connects to 4G when I make a call. If I use only 1 SIM, connection drops to HSPA+. I see an option to enable VoLTE on the second SIM, but it's disabled. Have you to find a way to enable it. I appreciate your feedback, thanks again.
Click to expand...
Click to collapse
As you probably know, mine only has one Sim slot and when I go to settings and drill down into the mobile network options, under 'Advanced' Enhanced LTE Services is already enabled.
ILuvRice said:
As you probably know, mine only has one Sim slot and when I go to settings and drill down into the mobile network options, under 'Advanced' Enhanced LTE Services is already enabled.
Click to expand...
Click to collapse
i have the same setting/option and it's also enabled; see below. will contact at&t again tomorrow.

Dual sim full active

Anybody tested? Like mate 8.
blackhead2048 said:
Anybody tested? Like mate 8.
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No dualsim standby only
easycure1974 said:
No dualsim standby only
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What does this mean?
daz_2000 said:
What does this mean?
Click to expand...
Click to collapse
Second sim is not available, when you are using the first one (when answering/making a call).
...and if I am surfing on socials like Facebook in SIM #1 does it work receiving call on SIM #2 or is it stopped?
EDIT: solved
Similar to the Huawei Mate 10 series, the P20 and P20 Pro can support dual-SIMs with dual 4G and dual VoLTE running at the same time. This provides the best dual-SIM experience as both lines are connected to the best network possible. It also supports download speeds of up to 1.2Gbps with 4X4 MIMO over a 4.5G LTE network.
Nezzox said:
Similar to the Huawei Mate 10 series, the P20 and P20 Pro can support dual-SIMs with dual 4G and dual VoLTE running at the same time. This provides the best dual-SIM experience as both lines are connected to the best network possible. It also supports download speeds of up to 1.2Gbps with 4X4 MIMO over a 4.5G LTE network.
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This all depends on whether you have the dual sim version of the P20 Pro. Most UK versions are single SIM only. Allegedly, these can be converted to dual sim using a guide available on this forum or using the funky huawei paid service. I am still looking for full verification that this workaround is fully functional or not. Goes without saying that, you will also need to buy a dual sim tray for these UK versions of the P20 Pro.
subhani said:
This all depends on whether you have the dual sim version of the P20 Pro. Most UK versions are single SIM only. Allegedly, these can be converted to dual sim using a guide available on this forum or using the funky huawei paid service. I am still looking for full verification that this workaround is fully functional or not. Goes without saying that, you will also need to buy a dual sim tray for these UK versions of the P20 Pro.
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Oh, I'm in Sweden, and my dual SIM works like a charm. Have my work sim and private sim running simultaneously without any issues at all. I opted in the settings to run the surf on sim 2 since I have more data on that one even.
I do wish I could set one number at "do not disturb" at a time. Or change the ringer to vibrate or silent for just one of the phone number.
Nezzox said:
Similar to the Huawei Mate 10 series, the P20 and P20 Pro can support dual-SIMs with dual 4G and dual VoLTE running at the same time. This provides the best dual-SIM experience as both lines are connected to the best network possible. It also supports download speeds of up to 1.2Gbps with 4X4 MIMO over a 4.5G LTE network.
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Still only dual sim standby and not dual sim active so it could be better
subhani said:
This all depends on whether you have the dual sim version of the P20 Pro. Most UK versions are single SIM only. Allegedly, these can be converted to dual sim using a guide available on this forum or using the funky huawei paid service. I am still looking for full verification that this workaround is fully functional or not. Goes without saying that, you will also need to buy a dual sim tray for these UK versions of the P20 Pro.
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@OP
What this guy said is 100%
The only way to obtain dual SIM from a single SIM variant is to essentially lose bootloader unlocking ability by using the funky Huawei method.
It's up to you to decide which you think is more important.
easycure1974 said:
Still only dual sim standby and not dual sim active so it could be better
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Well, don't know what to tell you. I have dual active.
Nezzox said:
Well, don't know what to tell you. I have dual active.
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What's the difference between active and standby? Plus, did you rebrand your phone after network unlocking it? Did it affect the network unlock at all?
subhani said:
What's the difference between active and standby? Plus, did you rebrand your phone after network unlocking it? Did it affect the network unlock at all?
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Uhm, well. Mostly here in Sweden the phones are unlocked and unbranded. So, I just smacked my work sim and private sim in the phone and activated the "dual active 4G" option.
subhani said:
What's the difference between active and standby? Plus, did you rebrand your phone after network unlocking it? Did it affect the network unlock at all?
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Well the text is in Swedish. But the options says, "internet access during phonecall" and "dual SIM 4g".
Nezzox said:
Well the text is in Swedish. But the options says, "internet access during phonecall" and "dual SIM 4g".
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I understand now. Thanks.
Nezzox said:
Well, don't know what to tell you. I have dual active.
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You dont. Try to make a call from sim2 when sim1 is engaged in a call. Or be on a call on sim1 and and get a notice when someone calls you on sim2 and change to that call. You cant do that and that is the difference of dualsim standby and active. The last Huawei device to have dualsim active was the Honor 8. After that they have stopped supporting it, cheaper with standby than active
easycure1974 said:
You dont. Try to make a call from sim2 when sim1 is engaged in a call. Or be on a call on sim1 and and get a notice when someone calls you on sim2 and change to thst call. You cant do that and that is the difference of dualsim standby and active
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Yeah that works. If I'm in a call I can add a call using the second line without the first call dropping out. The first call can't hear me tho, unless I switch back. But, both are connected, just the the speaker and mic can only be connected to one at a time. I figure that's a software limitation tho.
Nezzox said:
Yeah that works. If I'm in a call I can add a call using the second line without the first call dropping out. The first call can't hear me tho, unless I switch back. But, both are connected, just the the speaker and mic can only be connected to one at a time. I figure that's a software limitation tho.
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Strange that your phone can make it but not mine. And since the phone just supports dualsim standby and not active it should not work. Thats why there are an option to forward calls to the other sim when the the first one is engaged in a call as it is not possible to have both sims active at the same time as the phone just got one radio part.
easycure1974 said:
Strange that your phone can make it but not mine. And since the phone just supports dualsim standby and not active it should not work. Thats why there are an option to forward calls to the other sim when the the first one is engaged in a call as it is not possible to have both sims active at the same time as the phone just got one radio part.
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I actually just tried after the last comment to make sure. And it works. It might be because both of the cards are on the network provider "3" and they do the calls over 3g and 4g since they don't have 2g access. And as my earlier screenshot shows, you can have both of the 4g's active at the same time.
But if you're right about that "one radio part" shouldn't that also be impossible? I'd think it's weird to build in two 3/4g antennas and just one 2g.
Sorry I have to revive this dead topic.
Is there an updated list of DSFA smartphones (dual sim active, two radio modules)?
I know DSFA can somehow be "emulated" using VoLTE /dual VoLTE or VoWifi if the device and carrier supports it.

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