[Q] Tips for running AT&T GS4 on Tmobile - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

Gentlemen,
I currently got myself an AT&T model galaxy s4 and Im looking to run it on Tmobile. My question is what advice do you guys have for a noob like me?
Do I need to unlock the bootloader?
Is there a specific ROM I should use?
How do I get MMS and group text to work?
What's the best method to unlock my GS4?
Thanks!

The best method to unlock your GS4 is to request the code from AT&T if you have an account with them.
To get MMS to work you need to edit the APN settings to t-mobile's configuration. You may need to copy this from a t-mobile phone, ask a friend, or Google it.

The instructions to change the APN are on the T-Mobile website. Just Google it or fish around on their site. I found it somewhere under the bring your own phone options.
Sent from my SPH-L720 using Tapatalk

Related

[Q] Samsung S4 SCH-R907C unlock

Wasn't sure where to post this as there wasn't an option for Cricket S4. I am however trying to switch this to Bell so i thought this may be best.
Hello folks, I recently purchased a Samsung S4 from Cricket Wireless. I need to unlock this unit to work on Bell Canada which runs CDMA and GSM technologies. After alot of discussion with Cricket they did end up giving me a 8 digit unlock code. The problem is it runs on CDMA and when I take the Cricket sim out to install the Bell sim it doesn't give me the option to enter an unlock code. I did the dialer option and that didn't work either. All the phone says is invalid sim.Thank you all in advance.
Any luck unlocking S4
HI, I know its been a while since you posted this thread but I just came across it. I am trying to get a Cricket S4 onto the bell network and need to unlock it. Did you ever have any luck unlocking yours? I would greatly appreciate it if you have any advice for me. Thank you very much.

Unlock Samsung S4 i337 without SIM

Hello guys,
newbie here, just got the s4... The S4 is locked to AT&T and i am on ROGERS (canada) however I do not have the AT&T sim, what is the procedure i need to follow to unlock this phone. Do i need to purchase a unlock code or is there a free method available?
Thanks guy
I switched over from a blackberry z10, that phone was like a iphone3 compared to this s4
Please read forum rules before posting
Questions and Help issues go in Q&A and Help section
Thread moved
Thank you for your cooperation
Friendly Neighborhood Moderator
Also this is not the I337 section. I will move you to the correct device as well
If you put a att sim card it will just work so no need for unlocking, but if you put a Rogers sim card then the the phone will ask for a unlock code
Sent from my Ssamsung Galaxy s4
beginner09 said:
Hello guys,
newbie here, just got the s4... The S4 is locked to AT&T and i am on ROGERS (canada) however I do not have the AT&T sim, what is the procedure i need to follow to unlock this phone. Do i need to purchase a unlock code or is there a free method available?
Thanks guy
I switched over from a blackberry z10, that phone was like a iphone3 compared to this s4
Click to expand...
Click to collapse
You could try this unlock method posted earlier.
http://forum.xda-developers.com/showthread.php?p=41585780
I need help to unlock sim carrier on i337M
Hey maybe you could help. I tried everything. I downlaod the Odin, CF file and root the phone. also try to figure out and unlock my samsung S4, but it still locked and ask for code. I also got the REgionLock away app and it does'nt work. Well it does but at the end my phone still locked by the carrier : BELL Mobility
My mom gave me this phone as a gift and I want to use it with my actual carrier ''FIDO''... I do not want to paid 50$ for that..
Is there any way that i could get a code or unlock the pĥone?
What rom is on the bell phone? Did you downgrade the modem before running regionlockaway?
what is a rom?
What do you mean by rom and downgrading the phone? I got the lollipop version 5. 1. 0.
Model SGH i337m. I tried most everthing including dialing codes (*#0011* follow step by step).. but its not working. Each time i put the sim card from my carrier (Fido) it asked for a code to unlock the phone. Im not an expert in that kind of stuff either but i tried to get my phone unlock whithout paying if i can. Could you helped me? Did you need my IEMI number?
http://forum.xda-developers.com/showpost.php?p=66051022&postcount=726

Convert to i9500?

A friend of mine got a Sprint S4 but he wishes to use it with a GSM Carrier.
First couple things I noted are:
1) No SIM Card Contact Management, had to use an App to copy all to phone
2) Cannot find GSM APN settings to manually enter
Is it possible to flash a stock International i9500 ROM over this to alleviate the issues with using a mainly CDMA version?
Technoboi said:
A friend of mine got a Sprint S4 but he wishes to use it with a GSM Carrier.
First couple things I noted are:
1) No SIM Card Contact Management, had to use an App to copy all to phone
2) Cannot find GSM APN settings to manually enter
Is it possible to flash a stock International i9500 ROM over this to alleviate the issues with using a mainly CDMA version?
Click to expand...
Click to collapse
I do not believe you can flash an international ROM to this phone unless you want a pretty paperweight. But there are some tutorials to unlock your SIM to be able to use on other carriers, here is where I'd start. However if he's on a Knox bootloader I think the chance is next to zero for using it on GSM because you have to 'go back' to MDC to do some required stuff.
If he wanted to use a gs4 on a GSM network he should have gotten a GSM version not a CDMA
Sent from my SPH-L720 using Tapatalk
It is actually already unlocked as he can use Voice etc just a bit tricky to get the APN settings to work for 3G...

SPH-L720 into SGH-M919

Someone commented about turning their Sprint GS4 into a T-Mobile GS4 running a google edition rom.
i have been searching and cant find anything about this but i remember reading it makes it easier to domestic unlock with tmobile and att since its a tmobile firmware
does this firmware go on the sprint GS4 easily or is their custom firmware about this?
thanks
There is already a discussion about unlocking the SGS4 to work with T-Mobile.
You can do it! Use that search tool.

[Q] replace ATT S5 with T-Mobile

I think I can get a T-Mobile S5 and a SIM unlock and use it on AT&Ts network. Is this correct? I really want an unlocked bootloader and the abilty to run non touchwiz roms. Also, is it possible to create a hybrid kernel gto support AOSP roms under touchwiz. Never mind, locked boot loader can't change the kernel anyway, can I?
The other option may be the verizon dev edition phone. Is it possible to unlock it for ATT Network use? I'm a developer myself but just into android and cell phones in general, and I do not yet know what parts fit togrther
dposea123 said:
I think I can get a T-Mobile S5 and a SIM unlock and use it on AT&Ts network. Is this correct? I really want an unlocked bootloader and the abilty to run non touchwiz roms. Also, is it possible to create a hybrid kernel gto support AOSP roms under touchwiz. Never mind, locked boot loader can't change the kernel anyway, can I?
The other option may be the verizon dev edition phone. Is it possible to unlock it for ATT Network use? I'm a developer myself but just into android and cell phones in general, and I do not yet know what parts fit togrther
Click to expand...
Click to collapse
The T-Mobile S5 is capable of being unlocked and used on at&t's network.
I use a T-Mobile variant on AT&T and love it.
All the required bands, excellent speeds and plenty of ROM options.
Unlock G900A
seanpr123 said:
I use a T-Mobile variant on AT&T and love it.
All the required bands, excellent speeds and plenty of ROM options.
Click to expand...
Click to collapse
I have an ATT SM-G900A S5 that is locked. I have the unlock code but don't know how to enter it. I have an old T-Mobile Sim but it is deactivated so it wont trigger the unlock fields. is there a code( *#xxx#) I can use to allow me to enter the unlock code?
Do I have to find an active T-Mobile sim?
Thanks for the advise. I just got this S5 and can do all but use it as a hot spot! ugh HELP!
MWTTRON said:
I have an ATT SM-G900A S5 that is locked. I have the unlock code but don't know how to enter it. I have an old T-Mobile Sim but it is deactivated so it wont trigger the unlock fields. is there a code( *#xxx#) I can use to allow me to enter the unlock code?
Do I have to find an active T-Mobile sim?
Thanks for the advise. I just got this S5 and can do all but use it as a hot spot! ugh HELP!
Click to expand...
Click to collapse
First of all don't just randomly post in other peoples threads. Do you have a question? Thoroughly use the site's search function and search google. If, and only if, you haven't found your answer you start your own thread (not just randomly post in other peoples threads).
As far as I know you need a working sim card of another operator. I'm sure you can order them for free online.
Don't post in this thread no more. Make your own instead.
Here is a really good start for you. Good luck. :good:

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