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Running the S4 Active on T-Mobile, anything else I should do?

Hi all.
I have been using my AT&T S4 Active on T-Mobile for the past week. I got it unlocked via an eBay seller and everything has been working great thus far. I had a question though regarding bands and whether or not all the bands available to me are unlocked. Right now where I live I pick up 4G/LTE (although not as strong in my apartment and cuts in and out periodically). I had read that when you unlock a phone via the code it automatically unlocks the bands that were previously not available (when locked to AT&T). Another thread I read that the user has to still unlock those bands. I was hoping someone could clarify this and point me in the right direction! Thanks guys!

jdminpdx said:
Hi all.
I have been using my AT&T S4 Active on T-Mobile for the past week. I got it unlocked via an eBay seller and everything has been working great thus far. I had a question though regarding bands and whether or not all the bands available to me are unlocked. Right now where I live I pick up 4G/LTE (although not as strong in my apartment and cuts in and out periodically). I had read that when you unlock a phone via the code it automatically unlocks the bands that were previously not available (when locked to AT&T). Another thread I read that the user has to still unlock those bands. I was hoping someone could clarify this and point me in the right direction! Thanks guys!
Click to expand...
Click to collapse
Are you able to use mobile data with only unlocking the phone? I am about to buy this phone but i heard after unlocking only call/sms will work and not data.
I read here that for data we need to do other stuff

This phone says " LTE Bands 2, 4, 5 and 17" on AT&T website and I'm wondering if this phone will work on other carriers LTE network(T-Mobile, Verizon, or others?)? I know Verizon is CDMA and at&t and T-Mobile are GSM but can anyone answer this?
Sent from my Xperia Play using xda premium

Works on T-Mobile LTE
cyrusalmighty said:
This phone says " LTE Bands 2, 4, 5 and 17" on AT&T website and I'm wondering if this phone will work on other carriers LTE network(T-Mobile, Verizon, or others?)? I know Verizon is CDMA and at&t and T-Mobile are GSM but can anyone answer this?
Sent from my Xperia Play using xda premium
Click to expand...
Click to collapse
I got the AT&T SGH-i537 model. Pay $15 to have it unlock. Now using it with T-mobile. I got LTE. In some area, I got 23mbps download and 3.6mbps upload. It doubled my Galaxy Nexus speed. The device status info said I am on LTE:14
However, my mobile tethering is disabled. Need to find a way to enable that. Stupid AT&T lock it.

As long as you have the correct setting input into your phone your data will work ( assuming you have a data plan). I remember when the original Iphone came out I unlocked it for T-mobile and had internet on it even though it was branded AT&T only. (EDGE lol 56kb speed) but still it worked...

Root

I unlocked mine with ATT and used it with TMobile while I was in Hawaii. I only had to put my SIM in and I got pretty fast speeds (around 22mbps from what I remember) I don't know if that's the normal speed but compared to the crappy speeds on Guam it was lightening speeds to me! No root or anything needed, no difference after rooting either.

i can confirm it works minus teathering due to att

This is interesting as I thought ATT phones cannot receive Tmobiles LTE.
Sent from my HP SlateBook 10 x2 PC using Tapatalk 4

Does this phone get T Mobiles HSPA+?
Sent from my Samsung S4 Active using Tapatalk 2

Avail211 said:
I unlocked mine with ATT and used it with TMobile while I was in Hawaii. I only had to put my SIM in and I got pretty fast speeds (around 22mbps from what I remember) I don't know if that's the normal speed but compared to the crappy speeds on Guam it was lightening speeds to me! No root or anything needed, no difference after rooting either.
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Click to collapse
tmobile hspa + can get up to 42mbps so that sounds about right.
Sent from my HP SlateBook 10 x2 PC using Tapatalk 4

[Q] flash AT&T on verizon note 3?

So my father in law pre-ordered a note 3 for me.
Yet I am not on Verizon. I am on AT&T.
I have been flashing for years on my androids, But, I am unsure if I can flash AT&T firmware to make it work properly on my network. (at least until I start flashing other roms!) Any help would be good.
I don't want to sell or trade it in, MY Wife would be sooooooo pissed!!! she would definately know.
So, can i just reflash AT&T firmware on the verizon phone?
Thanks in advance.

From my understanding nope. Something to do with the bootloader. To be totally honest I don't know the details, I just tried to find that out a year ago when looking for phones on craigslist.
Tell your wife there's nothing you can do and sell the thing. It's not that big of a deal really. You'll get a pretty penny for it and will be able to have almost the entire price of a new one from verizon.

Vzw is cdma and att is gsm the phone will not work. There is no fixing hardware in the phone
Sent from my SPH-L900 using Xparent BlueTapatalk 2

Yup, won't work. Even if you could flash the ATT ROM, the hardware is different.

I have a similar question. Can I flash international and other gsm roms on a tmo note.?
Like I can on my s4?
Sent from my SGH-M919 using XDA Premium 4 mobile app

Just switch to Verizon and cancel ur AT&T service. It is impossible to flash AT&T onto verizon device.
Sent from my SAMSUNG-SGH-I717 using xda app-developers app

erbch said:
I don't want to sell or trade it in, MY Wife would be sooooooo pissed!!! she would definately know.
Click to expand...
Click to collapse
what? Why? What kind of relationship are You in!?

The posts here are ALL INCORRECT...... YES Verizon is a CDMA carrier, But what does there LTE run on??? GSM....
NO you cant flash AT&Ts Note 3 rom on a Verizon note 3. Just pop your AT&T Sim card in, Set up your APN and set the phone to GSM only and BAM it just works no root no mod no nothing.
You WONT get LTE, Only 3G and Edge.
This works on the Verizon Galaxy S3 and the Verizon Galaxy S4....

Some necessary info . . .
"You WONT get LTE, Only 3G and Edge"
The S4 will work perfectly on AT&T, by simply calling them and asking for a free SIM card, assuming you are an AT&T customer. And, LTE works perfectly, as well.
~Speaking from experience.

the verizon note 3 is already factory unlocked all you have to do is go into the settings and click GSM and set ur apn settings and you will not get LTE but you will have hspa+ and full talk and text with no issues
Sent from my SAMSUNG-SM-N900 using XDA Free mobile app

AT&T on T-mobile S5

Hi, I got a T-mobile S5, and unlocked it. My 3G works but LTE won't register, I am 100% sure that the APN is correct.
Any ideas what I am doing wrong?

-You need an att modem file flashed on your device, but im not 100% sure. Ihave my stock rom files from kies and amoung them is my csc file. Keep reading. Get to know your phone.-
Someone please confirm this is the right route and I will share my csc file with you
Start by rooting your phone and getting a custom recovery (Philz). Check the tmobil section of s5 ...
Sent from my SAMSUNG-SM-G900A using xda app-developers app
EDIT: Thanks all for you input and pointing out the right solution. Always appreciate the fast responses.

Commodore 64 said:
You need an att modem file flashed on your device, but im not 100% sure. Ihave my stock rom files from kies and amoung them is my csc file. Keep reading. Get to know your phone.
Someone please confirm this is the right route and I will share my csc file with you
Start by rooting your phone and getting a custom recovery (Philz). Check the tmobil section of s5 ...
Sent from my SAMSUNG-SM-G900A using xda app-developers app
Click to expand...
Click to collapse
He does not need an AT&T modem flashed on his device. That would most likely result in a brick.
OP: Try dialing *#2263# and make sure automatic is selected. Also go into setting, mobile networks and set it to LTE/GSM/WCDMA

MattMJB0188 said:
He does not need an AT&T modem flashed on his device. That would most likely result in a brick.
OP: Try dialing *#2263# and make sure automatic is selected. Also go into setting, mobile networks and set it to LTE/GSM/WCDMA
Click to expand...
Click to collapse
I tried to do LTE only and it has the right network code, but it won't activate. I checked my ATT online profile and it doesn't have a "LTE" data plan and I think that is the problem. I'll try again tomorrow once it takes effect and report back

kamidake said:
I tried to do LTE only and it has the right network code, but it won't activate. I checked my ATT online profile and it doesn't have a "LTE" data plan and I think that is the problem. I'll try again tomorrow once it takes effect and report back
Click to expand...
Click to collapse
Ok you need to give ATT the IMEI number from one of their LTE android devices. Just go to the store to get one from one of the demo devices. Then your account will be provisioned for LTE.

kamidake said:
I tried to do LTE only and it has the right network code, but it won't activate. I checked my ATT online profile and it doesn't have a "LTE" data plan and I think that is the problem. I'll try again tomorrow once it takes effect and report back
Click to expand...
Click to collapse
The guy above is correct, you need at&t to register your imei into their network to access their LTE.... They should do it for you no problem, just give them a call....however I wouldn't be surprised if they don't! Another way is to find someone with an extra LTE phone and just activate that imei and your LTE should pop up
Sent from my SAMSUNG-SM-G900A using XDA Premium 4 mobile app

Simer03 said:
The guy above is correct, you need at&t to register your imei into their network to access their LTE.... They should do it for you no problem, just give them a call....however I wouldn't be surprised if they don't! Another way is to find someone with an extra LTE phone and just activate that imei and your LTE should pop up
Sent from my SAMSUNG-SM-G900A using XDA Premium 4 mobile app
Click to expand...
Click to collapse
If he registers his T-Mobile S5 on AT&T he will still have problems. AT&T won't recognize the T-Mobile IMEI number, and therefore it will list as a GSM device.
He needs to find an IMEI number of one of AT&T's LTE android devices. Once he has called AT&T CS and have had them provision his account for LTE, then he can just pop in his AT&T sim card to his T-Mobile S5. He'll get LTE then.

MattMJB0188 said:
If he registers his T-Mobile S5 on AT&T he will still have problems. AT&T won't recognize the T-Mobile IMEI number, and therefore it will list as a GSM device.
He needs to find an IMEI number of one of AT&T's LTE android devices. Once he has called AT&T CS and have had them provision his account for LTE, then he can just pop in his AT&T sim card to his T-Mobile S5. He'll get LTE then.
Click to expand...
Click to collapse
What he said.

What are your APN settings? I have T-Mobile S5 on AT&T and have LTE working.

dustintinsley said:
What are your APN settings? I have T-Mobile S5 on AT&T and have LTE working.
Click to expand...
Click to collapse
Just wondering where did you unlock the phone from and how long did it take to get the unlock code?

Thanks for everyone's help. I am good to go.
I took a SIM from another LTE device. I think it does need to be registered as a IMEI from an ATT device and that was the problem.

kamidake said:
Thanks for everyone's help. I am good to go.
I took a SIM from another LTE device. I think it does need to be registered as a IMEI from an ATT device and that was the problem.
Click to expand...
Click to collapse
Now that you are getting AT&T LTE on the T-Mobile variant, can you please comment on LTE signal strength? This is a deal breaker for me. When I had the TMO Note 3 on AT&T, LTE reception sucked. If you can compare it with an AT&T branded phone, that would be great.

Another person using the G900T. Congrats
My experience is that coverage is just as good if not better. Same radio, same antenna, I wouldn't expect it to be any different?

The TMO GS5 has all the needed ATT LTE Bands no need for a radio flash, I'm using one on ATT now, have gotten LTE from day 1, as stated only requirement is the sim has to be originally activated on a LTE ATT device and that the APN is set properly.

What kind of speed is everyone getting with the tmo s5 on att network? I have an att s5 next to a tmo s5 and att s5 is getting 50mbps vs tmo at 20mbps. I am wondering if I needed to configure something on the tmo devices?

vince2398 said:
What kind of speed is everyone getting with the tmo s5 on att network? I have an att s5 next to a tmo s5 and att s5 is getting 50mbps vs tmo at 20mbps. I am wondering if I needed to configure something on the tmo devices?
Click to expand...
Click to collapse
Check your APN setting. The T-Mobile S5 should have the same exact APN settings your S5 has. Can you also comment on LTE reception on the T-Mobile S5 using AT&t?

MattMJB0188 said:
Check your APN setting. The T-Mobile S5 should have the same exact APN settings your S5 has. Can you also comment on LTE reception on the T-Mobile S5 using AT&t?
Click to expand...
Click to collapse
APN is exactly the same as AT&T one. Reception is also same as AT&T one but the speed is a show stopper if it's half the speed. Any one have any ideas?

vince2398 said:
APN is exactly the same as AT&T one. Reception is also same as AT&T one but the speed is a show stopper if it's half the speed. Any one have any ideas?
Click to expand...
Click to collapse
I wouldn't sweat the speeds, unless you keep noticing it. Try again later. Perhaps the T-Mobile S5 needs a modem update? Keep us posted.

vince2398 said:
APN is exactly the same as AT&T one. Reception is also same as AT&T one but the speed is a show stopper if it's half the speed. Any one have any ideas?
Click to expand...
Click to collapse
Have the speeds improved?

MattMJB0188 said:
If he registers his T-Mobile S5 on AT&T he will still have problems. AT&T won't recognize the T-Mobile IMEI number, and therefore it will list as a GSM device.
He needs to find an IMEI number of one of AT&T's LTE android devices. Once he has called AT&T CS and have had them provision his account for LTE, then he can just pop in his AT&T sim card to his T-Mobile S5. He'll get LTE then.
Click to expand...
Click to collapse
I would also like to do this, but I just want to clarify something. I just bought an AT&T S5. Brand new, unopened, still in the box. I want to swap it for a T-Mobile S5, as the bootloader is unlocked. If I keep the AT&T SIM card before I sell it, and put it into the new Tmo S5, will I have any foreseeable issues? Will it work just like that, or will I need to retrieve something from my S5 before I swap it?
Thanks.
EDIT: I should clarify that the device is unactivated, and when I do activate it, I will be porting my existing number from Verizon.

Unlocked sprint note 4 sm-910p on tmobile

Wondering if there are any tmobile roms that work on a unlocked sprint version. I'm using a sprint rom now and it works ok. Just want to be the most compatible with tmobile as possible. I am a noob to using unlocked phones. I was with sprint for 10 + years and just switch to tmobile last week. Thanks in advance
Update- i flashed the the tmobile maximum ovrdrive n5 rom and its working great! Came from a sprint hybrid note 5 rom. Wiped and did a clean install and everything works great. Still no lte but my 4g has gotten better speeds. My new question is im still on my sprint ok1 modem should i try a tmobile modem or stay with it the way i have it?

I don't believe you can use a sprint phone on tmobile. Different network. And as for the rom. I don't think there are. I could be corrected but sprint phones are only good on sprints network and that's it.

macasus76 said:
I don't believe you can use a sprint phone on tmobile. Different network. And as for the rom. I don't think there are. I could be corrected but sprint phones are only good on sprints network and that's it.
Click to expand...
Click to collapse
Modern sprint phone support T-Mobile and ATT's HSPA network. Heck I used my unlocked Sprint S4 on ATT for about 5 months without any issues. Only thing was that I didn't get LTE.
Sent from my Nexus 6P using Tapatalk

using a sprint note 4 with tmobile rom just failed to get it passed edge network cant get 3G/4G

macasus76 said:
I don't believe you can use a sprint phone on tmobile. Different network. And as for the rom. I don't think there are. I could be corrected but sprint phones are only good on sprints network and that's it.
Click to expand...
Click to collapse
I already have my sprint note 4 unlocked and working on t mobile Just don't get lte. Was wondering if a tmobile rom with the right modem would allow me to get lte. Maybe if a dev can make one or something

How well does the Verizon S10-5G work on AT&T?

I've seen that people on here have been flashing the Verizon variant with the AT&T via odin. I was thinking of buying a Verizon Variant and flashing it with AT&Tas well. But I would like to get some opinions first and see if anyone has had any trouble.

I haven't flashed AT&T on it but using on AT&T and it works just fine....

I'm not using it on AT&T, but haven't had a single issue on my network.

From what I understand, you may be fine on LTE, but you will not be able to use the 5G from AT&T on the Verizon phone.

shollywood said:
I haven't flashed AT&T on it but using on AT&T and it works just fine....
Click to expand...
Click to collapse
S10 5G from Verizon without flashing on AT&T?
How? I put in my ATT Sim card, get signal but when I open Google chrome it turns into no signal or as if I didn't have a Sim in it. Frustrating.
Did you had it activated to Verizon at the beginning? I heard for it to work elsewhere it'd need to be activated with Verizon for 60 days, then I can be used anywhere. Not entirely sure. Can you confirm?