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XT1254 prefered LTE band, "LTE only" radio mode

When I set radio modem in LTE/GSM(auto) mode all is ok - phone registered and works in LTE network, but when I set to "LTE only" mode, phone goes to enternal network search and found nothing (no network registered).
I think it's because in "LTE only" mode phones set to only Verizon LTE band 13, not global LTE.
How I can make phone works in mode "LTE only"?
If I need to change this "prefered" Verizon LTE band, how can I do this?
I use Verizon XT1254 bootloader unlocked + SU4TL-49 (5.1) stock in LTE band 3 (1800).
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Metalor said:
I use XT1254 bootloader unlocked + SU4TL-49 (5.1) stock in LTE band 3 (1800).
Click to expand...
Click to collapse
Not wise to go LTE only.
If you go LTE only, what happens when there's no LTE?
Like when there's only 3G coverage?
Or want to make a phone call? (Phone needs to drop down to 3G coverage, since you are not using Verizon and would not have access to Verizon's VoLTE. I'm in the U.S. on AT&T and drop down to HSPA temporarily for phone calls on my Quark, since I don't have access to AT&T's VoLTE.)
I would never go to LTE only as that would ensure my phone could not make phone calls (on the carrier I use) or even have data at all times (in poor LTE coverage areas).

ChazzMatt said:
Not wise to go LTE only.
Click to expand...
Click to collapse
I understand it, but this didn't resolve my problem.

Metalor said:
I understand it, but this didn't resolve my problem.
Click to expand...
Click to collapse
I don't see that you have a problem. You said it works fine in LTE/GSM auto mode and you get LTE fine in that mode.
Metalor said:
When I set radio modem in LTE/GSM(auto) mode all is ok - phone registered and works in LTE network
Click to expand...
Click to collapse
For some reason you want to cripple your phone in "LTE only" mode so you can't make/receive any phone calls (mobile voice calls don't work on regular LTE, only on 3G bands) -- and you wouldn't have the option of dropping down to 3G even for data in poor LTE areas.
So, what problem do you have except for the one you're trying to create?

ChazzMatt said:
I don't see that you have a problem. You said it works fine in LTE/GSM auto mode and you get LTE fine in that mode.
Click to expand...
Click to collapse
I want to use "LTE only" mode when I share internet connection to my laptop, because my network carrier provide unlimited free LTE traffic, but limited 3G traffic.
I also use Huawei E3372h (USB-modem) in "LTE only" mode and it works OK, so why XT1254 can't work the same way.
In "LTE/GSM(auto)" mode XT1254 sometimes break LTE connection (about 2 hours continuous data stream) and switch to 3G, so I want to use LTE on force mode, as I use Huawei F3372h now.

Metalor said:
I want to use "LTE only" mode when I share internet connection to my laptop, because my network carrier provide unlimited free LTE traffic, but limited 3G traffic.
I also use Huawei E3372h (USB-modem) in "LTE only" mode and it works OK, so why XT1254 can't work the same way.
In "LTE/GSM(auto)" mode XT1254 sometimes break LTE connection (about 2 hours continuous data stream) and switch to 3G, so I want to use LTE on force mode, as I use Huawei F3372h now.
Click to expand...
Click to collapse
Your Huawei E3372h (USB-modem) works in "LTE only" mode for extended periods of time in the exact same locations as your phone? Is it the same carrier or a different carrier?
Because in LTE/GSM (auto) mode on your phone, you should get LTE if LTE is available. You will get lower (3G/2G) either when LTE is not available or IF your carrier is kicking you off for some reason (congestion or maybe some kind of time/data limit). In those instances that you are NOT getting LTE now on your phone, I don't think you would get LTE by being in an LTE-only mode. I think instead you would get just no data, since the phone would not be able to downgrade to 3G/2G.
I may be wrong, but that's my theory. However, if your Huawei E3372h (USB-modem) works in "LTE only" mode for extended periods of time in the exact same locations with the same carrier , then I don't know.

There is one thing you can try...
I'm that same menu, press the three dots on the top right>select umts bands>usa only.
For me personally, this limited me to lte, and i had to reflash everything to fix it. I think 950mhz (to name one) was still working so this may not even make a difference to you

ChazzMatt said:
Your Huawei E3372h (USB-modem) works in "LTE only" mode for extended periods of time in the exact same locations as your phone? Is it the same carrier or a different carrier?
I may be wrong, but that's my theory. However, if your Huawei E3372h (USB-modem) works in "LTE only" mode for extended periods of time in the exact same locations with the same carrier , then I don't know.
Click to expand...
Click to collapse
Yes, same location, same network carrier and even same phone number (2 sim-cards for same number).
Xeroman0 said:
There is one thing you can try...
I'm that same menu, press the three dots on the top right>select umts bands>usa only.
For me personally, this limited me to lte, and i had to reflash everything to fix it. I think 950mhz (to name one) was still working so this may not even make a difference to you
Click to expand...
Click to collapse
Thanks, but this not work for me.
I found solution:
"LTE only" mode works only with radio MDM9625_104651.11.05.17R from VRZ_XT1254_5.1.1_LCF23.80_CFC_SVC / quark_verizon-user_LCF23.80_release-keys_firmware_upgrade_SVC firmware.
Thanks to sl2208 user from 4pda.

Metalor said:
Yes, same location, same network carrier and even same phone number (2 sim-cards for same number).
Thanks, but this not work for me.
I found solution:
"LTE only" mode works only with radio MDM9625_104651.11.05.17R from VRZ_XT1254_5.1.1_LCF23.80_CFC_SVC / quark_verizon-user_LCF23.80_release-keys_firmware_upgrade_SVC firmware.
Thanks to sl2208 user from 4pda.
Click to expand...
Click to collapse
Interesting. So every update since that July 2015 XT1254 firmware upgrade breaks that mode on the XT1254? That firmware folder is not complete, by the way. Doesn't even have SUTL-49. But I assume you are probably on SUTL-49 already?
The dates in that folder are only upload dates, not release dates. The upload dates are up to a year off from actual release dates. And they also have XT1225 firmware in the "XT1254" folder, for some strange reason.
And I know it's from July 2015 because of this post:
20th July 2015, 04:10 AM
http://forum.xda-developers.com/showpost.php?p=61948709&postcount=202
Semseddin said:
Curious if anyone flashed this new file, quark_verizon-user_LCF23.80_release-keys_firmware_upgrade_SVC.xml.zip , Provided to community 2 days ago.
edit : just flashed onto a xt1254 with android 5.1 , it softbricked the device, couldn't flash most of the partitions. Downloading stock 5.1 fxz to unbrick, lets see.
Click to expand...
Click to collapse

I tried SUTL-44, SUTL-49 and
VRZ_XT1254_KDF21.128-15_15_CFC_SVC, nothing of these works with ""LTE only" mode. Then I asked on 4pda forum and user sl2208 tells me, that he tried all firmwares from this folder and only with LCF23.80 "LTE only" mode works.

this might be out of topic but kind a related ...
I'm using 1254 with 1225 stock India 6.0.1 ... I'm able to set LTE only and data working just fine (I'm using GSM Provider) so I dont consider this is some kind of problem before.
the problem for me is ... the default value is "LTE/GSM" ... and when there's call in ... it's drop to "E" not to any 3G network [H+/H/3G or umts]
is there any option to set it to "LTE/WCDMA/GSM" (might be from build.prop or else ... since there's no option like that in *#*#4636#*#* ...

3Dota said:
this might be out of topic but kind a related ...
I'm using 1254 with 1225 stock India 6.0.1 ... I'm able to set LTE only and data working just fine (I'm using GSM Provider) so I dont consider this is some kind of problem before.
the problem for me is ... the default value is "LTE/GSM" ... and when there's call in ... it's drop to "E" not to any 3G network [H+/H/3G or umts]
is there any option to set it to "LTE/WCDMA/GSM" (might be from build.prop or else ... since there's no option like that in *#*#4636#*#* ...
Click to expand...
Click to collapse
Hey is there any way to install official Android 6.1 in xt1254 Verizon ??

shoc.shukla said:
Hey is there any way to install official Android 6.1 in xt1254 Verizon ??
Click to expand...
Click to collapse
might be this Nov 25 ...

Sorry, had an answer but not exactly what your want.

shoc.shukla said:
Hey is there any way to install official Android 6.1 in xt1254 Verizon ??
Click to expand...
Click to collapse
There are two ways......
1... If your boot loader is locked you have to wait you might get official Verizon/Motorola version probably later this or at the next month...
2....If you are unlocked (boot loader )you can unlock the Boot loader and flash the 6.1 version.

Nido221 said:
There are two ways......
1... If your boot loader is locked you have to wait you might get official Verizon/Motorola version probably later this or at the next month...
2....If you are unlocked (boot loader )you can unlock the Boot loader and flash the 6.1 version.
Click to expand...
Click to collapse
Be better to unlock the bootloader and wait for people to upload copies to manually flash with unlocked bootloader.
If your bootloader is locked you will get the OTA, but your bootloader may remain locked down forever after that. Sunshine can't promise an exploit.
With unlocked bootloader you can have the official Verizon Marshmallow firmware AND do other stuff -- like root, install xposed, etc.

4G Data but no voLTE calls defaults 3g

Hello all,
Recently purchased this phone.
As stated in the title I get 4g but when making or receiving a call default to 3g. Immediately back to 4g as soon as call over.
I disabled region check and Enhanced 4G LTE Mode toggle appeared in Mobile Network Settings. I enabled and restarted.
Also went into phone info using *#*#4636#*#* and all flags for voLTE are on there as well.
Carrier: Consumer Cellular (T mobile sim)
Bands 2 and 4
Does anyone know how to resolve ?

"#"#86583#*#*

Have you enabled volte with your carrier?

laviniu_c said:
"#"#86583#*#*
Click to expand...
Click to collapse
Thanks but already tried it before posting.
Tried again and restarted .... still 3g on calls.

-Protos said:
Hello all,
Recently purchased this phone.
As stated in the title I get 4g but when making or receiving a call default to 3g. Immediately back to 4g as soon as call over.
I disabled region check and Enhanced 4G LTE Mode toggle appeared in Mobile Network Settings. I enabled and restarted.
Also went into phone info using *#*#4636#*#* and all flags for voLTE are on there as well.
Carrier: Consumer Cellular (T mobile sim)
Bands 2 and 4
Does anyone know how to resolve ?
Click to expand...
Click to collapse
-Protos said:
Thanks but already tried it before posting.
Tried again and restarted .... still 3g on calls.
Click to expand...
Click to collapse
Maybe this can help you:
Download and install 4G Only Network Mode from Google Play Store.
Modify advanced network convigoration by opening the secret settings:
Click on Open Secret Settings
Under Set Preffered Network Type, choose LTE ONLY
This will automatically force your phone to exclusively connect to the 4G LTE only network.

akpe said:
Have you enabled volte with your carrier?
Click to expand...
Click to collapse
I called them, they did something on their end so now calls start in 3g but go the 'H" after a few seconds.
Probably still not volte but an improvement.
My understanding is that volte calls have an "HD" for this phone

-Protos said:
Thanks but already tried it before posting.
Tried again and restarted .... still 3g on calls.
Click to expand...
Click to collapse
volte carrier check needs to be "disabled" btw
try switching to airplane mode and back. also make sure you have your sim in sim1!
what country/carrier are you on?
---------- Post added at 11:53 PM ---------- Previous post was at 11:50 PM ----------
-Protos said:
I called them, they did something on their end so now calls start in 3g but go the 'H" after a few seconds.
Probably still not volte but an improvement.
My understanding is that volte calls have an "HD" for this phone
Click to expand...
Click to collapse
H is hspda, that's not volte...

-Protos said:
My understanding is that volte calls have an "HD" for this phone
Click to expand...
Click to collapse
Yes, you're right. When volte is enabled you should see an HD icon next to your signal strength icon. Just like this:
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After your carrier enables volte you should reboot if you haven't already. Volte is used only with 4G, so after the reboot you should get the HD icon when you're connected on 4G. To test it out (or if you are still on 3G/H) do the following:
Press *#*#86583#*#* on dialer until carrier check is disabled. If it says enabled, just type it in again.
Then press *#*#4636#*#* on dialer to start the hidden menu. Go to the first tab, I believe it's called phone information, and scroll down where its says preferred network type. Note down the default value (it should restore on reboot and flight mode, but just in case) and select LTE (or 4G if it's called that) only. You will lose signal for a moment, and then you should be back running in 4G. Obviously, you need to be on a location with good 4G coverage.
Then, just make a call. If it gets through without dropping the data connection (4G symbol stays on), you're on volte. Go back to *#*#4636#*#* to restore your preferred network type, and enjoy

I tried everything posted so far but no luck.
I have a nexus 5x on with an identical sim on the same network/towers that shows me lte over the bars.
This phone only shows me 4G ..... is the phone capable of displaying lte ?
When selecting preferred network type lte only. It will drop the call.

LTE is 4G. Each phone uses different symbols, but it's the same. The fact that it drops the call probably means that volte is not enabled... weird. Have you contacted your carrier about it?

https://forum.xda-developers.com/mi-a2/how-to/guide-volte-t-mobile-yes-actually-t3869677
I just figured it out. Just follow the guide.

Thanks for the post Daha3ker ..... I will see if anyone else tries it before giving it a go.
I am quite sure at this point its a network issue as it is also happening on my Nexus 5x (LTE then H during call)

Confirmed it is a network issue. They are sending me ATT sims to try.
The tech support wasn't the brightest bulb, she kept trying to convince me I need to be on wifi to place an LTE call.
After some passive aggressive attempts to convince me she finally told me T-mobile does not support volte with them.

VoLTE depends of the carrier, it has to be enabled on his network equipments.
Some carriers enable it per phone line (they have to enable it for your line)
Moreover, some carriers restrict VoLTE for specific devices. Here in France, Orange enable VoLTE only for Apple and Samsung devices...

youl_junior said:
Moreover, some carriers restrict VoLTE for specific devices. Here in France, Orange enable VoLTE only for Apple and Samsung devices...
Click to expand...
Click to collapse
What if you just use a Samsung or Apple device to enable it?
Here in Greece, Cosmote also enables VoLTE only for specific devices, Samsung, Apple and Huawei. The Mi A2 isn't one of them. But I managed to... side-enable it. I just inserted my sim card in a Huawei device and sent the text to enable it. They enabled it in my sim, and of course it still works after I moved the sim back to the A2
Στάλθηκε από το Mi A2 μου χρησιμοποιώντας Tapatalk

akpe said:
What if you just use a Samsung or Apple device to enable it?
Here in Greece, Cosmote also enables VoLTE only for specific devices, Samsung, Apple and Huawei. The Mi A2 isn't one of them. But I managed to... side-enable it. I just inserted my sim card in a Huawei device and sent the text to enable it. They enabled it in my sim, and of course it still works after I moved the sim back to the A2
Στάλθηκε από το Mi A2 μου χρησιμοποιώντας Tapatalk
Click to expand...
Click to collapse
Orange say that it is available and automatically enabled on Apple devices, and on Samsung devices which were purchased in Orange stores. So I think there is something special in phone rom.

Problem resolved. Was a carrier issue.
Required an ATT sim and add a new Access Point
* Note if using Consumer Cellular you will need the ATT sim for Volte.
Tmobile does not support Volte on CC as relayed by tech.
Thanks to all who posted.

-Protos said:
Problem resolved. Was a carrier issue.
Required an ATT sim and add a new Access Point
* Note if using Consumer Cellular you will need the ATT sim for Volte.
Tmobile does not support Volte on CC as relayed by tech.
Thanks to all who posted.
Click to expand...
Click to collapse
I have MetroPCS Sim in miA2 does it support VOLTE ?

Thanks bro best solution

Wifi calling and Volte

Hi. So I was having trouble with calls, signal drops, very annoying whooshing noises and so on. When I contacted the carrier they said let's turn VOLTE THEN WIFI CALLING. my wife and I have the p20 pro CLT-LO4 and neither of our phones have an option for volte or wifi calling. Contacted carrier(Koodo) I'm in canada. They said well it's suppose to be there reset you phone and check again. No dice then press *#*#4935#*#* and it does nothing. They say it's enabled on there end and don't have a solution... I called Huawei and they took my serial number and model and told me that it's the carrier 100%....

try this.
Open phone settings > Wireless & networks > Mobile network > both VoLTE calls and Wi-Fi calling settings should be there.
if you can't find, it is because the carrier disabled it in the rom. Try to unlock bootloader, root and flash an international rom to get it back.

When I talked to the carrier they assured that it was unlocked.
If you have a link on how to preform the tasks you said ide definately give it a try
Thank you

One question tho is it possible to brick the phone? Reason I'm asking is my wife's phone is 8 months old but I just switched from my s9 to this one 2 days ago so i can tech bring it back and get a refund but the problem is there isn't any other phones offered besides the p30 pro that compare and I would have to pay $690 down plus 20 a month for 24 months where as p20pro was $0 down and 15 a month.

If the carrier supports it, then you should have the option in settings. In my case, when I bought the phone only one of the two carriers that I have in each sim card was supporting WiFi calling. Now that both support it, I have it in the settings. The problem that I have found with WiFi calling though is that if you start a phone call through WiFi and you move to a place with bad reception, then the call is dropping. Also, if you are on a WiFi call and you go to a place where the wifi has no reception whatsoever, then again the call drops, instead of switching to normal call. In other words, whatever the way you make the call, you have to finish it. There is no switching during the call; this became really frustrating, so I now switched it to mobile network preferred
Sent from my CLT-L29 using Tapatalk

Alot of misinformation about this on the net.
Regardless of what your carrier says this is in fact a carrier issue.
If you simply swap sim cards to another carrier that DOES support these features on all phones with no restrictions then it will show up in the settings.

sinnedone said:
Alot of misinformation about this on the net.
Regardless of what your carrier says this is in fact a carrier issue.
If you simply swap sim cards to another carrier that DOES support these features on all phones with no restrictions then it will show up in the settings.
Click to expand...
Click to collapse
Exactly, line one doesn't have that option but SIM 2 does .
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Sent from my EVR-L29 using Tapatalk

Limeybastard said:
Exactly, line one doesn't have that option but SIM 2 does .View attachment 4878505
Sent from my EVR-L29 using Tapatalk
Click to expand...
Click to collapse
This screenshot is from a Mate 20 X but the same thing shows up when I insert this sim into a P20 Pro.
(Oh....in the United States when you pop in a T-Mobile SIM you will have Volte toggle in settings but not on ATT)

sinnedone said:
This screenshot is from a Mate 20 X but the same thing shows up when I insert this sim into a P20 Pro.
(Oh....in the United States when you pop in a T-Mobile SIM you will have Volte toggle in settings but not on ATT)
Click to expand...
Click to collapse
T-Mobile SIM 1 , no volte toggle here thanks for the clarification. My post was primarily to reinstate your point about WiFi being carrier/SIM dependent.
Sent from my EVR-L29 using Tapatalk

quinnford said:
When I talked to the carrier they assured that it was unlocked.
If you have a link on how to preform the tasks you said ide definately give it a try
Thank you
Click to expand...
Click to collapse
I'll upload a video tutorial when i get back home tonight.

spiderx_mm said:
try this.
Open phone settings > Wireless & networks > Mobile network > both VoLTE calls and Wi-Fi calling settings should be there.
if you can't find, it is because the carrier disabled it in the rom. Try to unlock bootloader, root and flash an international rom to get it back.
Click to expand...
Click to collapse
hi i tried searching in google for the volte enable in my mobile device Huawei P20 Pro , my other sim says it is volte ready however the other sim volte radio button cant be seen i tried switching sims but everytime i switch sim the volte button will transfer leaving me a sim card tray with no volte does this mean that it is the carrier needs to enable volte? others say that i need to wait for update on my mobile device

My device has a model CLT-L29 Global version for Huawei P20 Pro EMUI version is 10.0.0 Android 10 and it says for this version there is no update for EMUI 11 so does this mean i can not use volte anymore or do i need to contact carrier for the volte to be enabled?

thanito said:
If the carrier supports it, then you should have the option in settings. In my case, when I bought the phone only one of the two carriers that I have in each sim card was supporting WiFi calling. Now that both support it, I have it in the settings. The problem that I have found with WiFi calling though is that if you start a phone call through WiFi and you move to a place with bad reception, then the call is dropping. Also, if you are on a WiFi call and you go to a place where the wifi has no reception whatsoever, then again the call drops, instead of switching to normal call. In other words, whatever the way you make the call, you have to finish it. There is no switching during the call; this became really frustrating, so I now switched it to mobile network preferred
Sent from my CLT-L29 using Tapatalk
Click to expand...
Click to collapse
I am also using CLT-L29 GLOBAL however only one sim has the wifi calling radio button enabled and hd calling but on sim 2 there is no volte calls radio button both sims are set to 4G i have tried switching sims but everytime i switch sims the sim that has volte calls radio button and wifi calling will move if i switch the sim cards the other sim tray no volte radio button will appear

mobile network not available

My P9 have problem with network (mobile network not available).
I don't get any message and calls, also can't call and write messenge. But mobile internet working fine 4G.
I found that, then i switch sim card slot in 2G option (dual card management) phone works. But problem is mobile internet now just 2G.
p.s. not using 2 sim card.
Build number: EVA-L19C432B166
Android 6.0
No Updates
Any idea???
I'm new there so ....

rokazas001 said:
My P9 have problem with network (mobile network not available).
I don't get any message and calls, also can't call and write messenge. But mobile internet working fine 4G.
I found that, then i switch sim card slot in 2G option (dual card management) phone works. But problem is mobile internet now just 2G.
p.s. not using 2 sim card.
Build number: EVA-L19C432B166
Click to expand...
Click to collapse
Test if calls and SMS work in the following scenarios (Settings/Wireless & networks/Mobile network)
1) Preferred network mode: 4g/3g//2g auto
If you have VoLTE settings, try VoLTE enabled and disabled
2) Preferred network mode: 4g/3g//2g auto
Disable: Mobile data
3) Preferred network mode: 3g only
Mobile data enabled and disabled

Nothing, still same problem
Then I set in 2g works, like in photo
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rokazas001 said:
Nothing, still same problem
Then I set in 2g works, like in photo
Click to expand...
Click to collapse
And with Preferred 3g only, does Mobile Internet work, and how the connection icons in the Status bar (top left) look like (see a screenshot)
Also, install apps like:
Network cell info lite
Net monster
Net monitor lite
and check for Preferred 3g only, do they show 3g band (cell, etc) the phone is attached to - see my screenshots
And go to:
https://willmyphonework.net/
fill your phone (Huawei, P9, L19), your country and operator and check under 3g does it show green checkmark
PS: I cannot open your Photo in the last post
Edit:
Check your operator's 3g bands (find on the Net or ask them), specially for 3g band(s) available where do you live, against the 3g bands supported by P9 L19:
https://consumer.huawei.com/ph/phones/p9/specs/

now then i updated to EVA-L19C432B399
Apear messange in top "no service" - Selected network .... 4G unavailable.
Then using both cards manualy selected use only 2G, no message warning, but no call and message. Signal indicators both cards almost full.
And then i go back to 1 card message apear again Selected network .... 2G unavailable.
If i restart phone no message warning. And Signal indicators almost full
https://pasteboard.co/IH53BvP.jpg
So 4G available. And on another phone working fine.
https://pasteboard.co/IH550YU.png
https://pasteboard.co/IH57ilO.png
Then i set main card like this in 2G its works call and internet, but another card not. But if i switch them one card will work who is in 2G slot.
It's looks like 1 card for calls 2G and another for internet 4G ....

rokazas001 said:
now then i updated to EVA-L19C432B399
Apear messange in top "no service" - Selected network .... 4G unavailable.
Then using both cards manualy selected use only 2G, no message warning, but no call and message. Signal indicators both cards almost full.
And then i go back to 1 card message apear again Selected network .... 2G unavailable.
https://pasteboard.co/IH53BvP.jpg
So 4G available. And on another phone working fine.
https://pasteboard.co/IH550YU.png
https://pasteboard.co/IH57ilO.png
Then i set main card like this in 2G its works call and internet, but another card not. But if i switch them one card will work who is in 2G slot.
It's looks like 1 card for calls 2G and another for internet 4G ....
Click to expand...
Click to collapse
You have Dual SIM settings to choose which SIM will be 4g/3g, the other will be 2g only.
Also, which to use for Data - see the screenshot.
Set accordingly (4g and Data to one SIM, default for calls the other SIM)
But did you check about 3g bands, as in my previous answer - apparently you cannot attach to 3g at your place. Supposedly, no 3g band to match between your operator and what the phone supports
Because, when you are on 4g (for Data), then it must switch to 3g for calls and SMS (and it cannot if it cannot attach to a supported 3g band)

Main card is card for calls and internet.
Now checked with 3G same problem.
Signal intication almost full. Tryed with mobile data on and off nothing.

Problem solve.
Phone blocked by imei ... Dam how simple to check

Wi-Fi Calling in India?

Jio and Airtel seems to be enabling Wi-Fi calling in India. On the list of supported handsets Android One handsets like Mi A1, A2 and A3 are missing.
Is this hardware issue (Xiaomi is just not having the right hardware)? Or a software issue (wi-fi calling not supported by Android One software)? Or it's just that Jio and Airtel has not started support for these devices.

WiFi calling is supported on the Mi A2. But even if those carriers don't support it on the Mi A2 (some carriers support features on a limited range of devices) you can probably still use it.
First you need to find which devices are supported. Then find a friend who has one of those devices, take out your sim, put it in his/her phone, and enable the service (usually through text?).
When you put the sim back to your Mi A2 the service will still be enabled. Dial *#*#869434#*#* on your dialer to disable wifi calling check, then open Phone, go to settings, Calling accounts, select your operator, and you should get a Wi-Fi Calling Option.

akpe said:
WiFi calling is supported on the Mi A2. But even if those carriers don't support it on the Mi A2 (some carriers support features on a limited range of devices) you can probably still use it.
First you need to find which devices are supported. Then find a friend who has one of those devices, take out your sim, put it in his/her phone, and enable the service (usually through text?).
When you put the sim back to your Mi A2 the service will still be enabled. Dial *#*#869434#*#* on your dialer to disable wifi calling check, then open Phone, go to settings, Calling accounts, select your operator, and you should get a Wi-Fi Calling Option.
Click to expand...
Click to collapse
Thanks for detailed explanations.

akpe said:
WiFi calling is supported on the Mi A2. But even if those carriers don't support it on the Mi A2 (some carriers support features on a limited range of devices) you can probably still use it.
First you need to find which devices are supported. Then find a friend who has one of those devices, take out your sim, put it in his/her phone, and enable the service (usually through text?).
When you put the sim back to your Mi A2 the service will still be enabled. Dial *#*#869434#*#* on your dialer to disable wifi calling check, then open Phone, go to settings, Calling accounts, select your operator, and you should get a Wi-Fi Calling Option.
Click to expand...
Click to collapse
Thanks for the detail explanation.... Did you try and this worked? I checked with Jio and there is no activation needed (like Text message that you mentioned)
Also how to disable the WiFi calling check in *#*#869434#*#* this Code doesn't work for me.. Did you mean *#*#4636#*#*
Can you share more details as would love to have this working

eabhi said:
Thanks for the detail explanation.... Did you try and this worked? I checked with Jio and there is no activation needed (like Text message that you mentioned)
Also how to disable the WiFi calling check in *#*#869434#*#* this Code doesn't work for me.. Did you mean *#*#4636#*#*
Can you share more details as would love to have this working
Click to expand...
Click to collapse
Hello, sorry for the late reply.
I'm not in India, I just followed the same instructions and it worked for me.
The only way to disable vowifi/wifi calling check is by dialing *#*#869434#*#*. You don't get another screen after doing this, just a quick notification in the bottom of the screen indicating that wifi calling check is disabled. You can miss it if you don't know where to look. Dialing the number again will enable the check. Dialing a third time will disable it again, and so on.
*#*#4636#*#* just gets you into the advanced phone options menu. Do this, dial *#*#4636#*#* and when the menu appears go to the top option, should be phone options. Then scroll down and look at the checkbox next to "wifi calling". It should be like my screen here:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Text is in Greek, sorry about that, but the option is the fourth from the top. It should be greyed out, but enabled (slider to the right).
If it's not like that, dial *#*#869434#*#* one more time and check again.

Update: I was able to enable VoWiFi using the *#*#869434#*#* code after the Android 10 update for Jio.
But when on VoWiFi call, my voice does not seem to reach the other end, so I have disabled it now.
Wish there was a way to fix it.

bluishguru said:
Update: I was able to enable VoWiFi using the *#*#869434#*#* code after the Android 10 update for Jio.
But when on VoWiFi call, my voice does not seem to reach the other end, so I have disabled it now.
Wish there was a way to fix it.
Click to expand...
Click to collapse
Well that sounds good, maybe something to do with enabling from Operators end.
Would recommend that you check after some days or a month or so to see if it is working better
BTW how did you enable WiFi calling, using the process suggested in the thread or it directly appeared after Android 10 update?

eabhi said:
Well that sounds good, maybe something to do with enabling from Operators end.
Would recommend that you check after some days or a month or so to see if it is working better
BTW how did you enable WiFi calling, using the process suggested in the thread or it directly appeared after Android 10 update?
Click to expand...
Click to collapse
Using the process mentioned.
BTW I also think since my voice was not going, it might be because of the asymmetric Upload and Download speeds of most service providers.
Not sure if there is a minimum speed requirements over WiFi.

bluishguru said:
Using the process mentioned.
BTW I also think since my voice was not going, it might be because of the asymmetric Upload and Download speeds of most service providers.
Not sure if there is a minimum speed requirements over WiFi.
Click to expand...
Click to collapse
Facing the same issue. I don't think it has anything to do with asymmetric internet bandwidth. The issue is on the Jio side, which they need to fix. As I understand, Mi A2 WiFi calling works fine on Airtel network.

RLOA said:
Facing the same issue. I don't think it has anything to do with asymmetric internet bandwidth. The issue is on the Jio side, which they need to fix. As I understand, Mi A2 WiFi calling works fine on Airtel network.
Click to expand...
Click to collapse
Yes, I heard the same thing and switched networks from Jio to Airtel. If a provider does not want to support my phone, I cannot support the provider. WiFi calling does work on Airtel, most of the times, sometimes it gets stuck (voice not clear even with perfect WiFi network), I simply reboot the phone and it works again.