How to use AT&T S4 on International Network?? - Galaxy S 4 Q&A, Help & Troubleshooting

Hi guys one of my friends bought a S4 in the US, It's AT&T locked SGH-I337 so can't use it with sim in our country (South Africa)We have two models of S4 here, the I9500&I9505. Was wondering what the right steps is to get the phone working? Must I root the phone and flash custom Rom & kernel or just unlock sim card? I'm not new to Rooting or flashing Roms but haven't fidled with carrier locked phones before [emoji3] [emoji2]
Send from my UNBENDABLE NOTE 3 ?

Leonidas300 said:
Hi guys one of my friends bought a S4 in the US, It's AT&T locked SGH-I337 so can't use it with sim in our country (South Africa)We have two models of S4 here, the I9500&I9505. Was wondering what the right steps is to get the phone working? Must I root the phone and flash custom Rom & kernel or just unlock sim card? I'm not new to Rooting or flashing Roms but haven't fidled with carrier locked phones before [emoji3] [emoji2]
Send from my UNBENDABLE NOTE 3 ?
Click to expand...
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Unlock it
There us a guide out there . just google it
"If someone helps, never forget to hit thanks ? "

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Samsung Galaxy S4 SCH-R970 US Cellular

Hi, i've purchased an Galaxy S4 from the Usa but I live in germany. I need to know, if there is an way to unlock the simlock of the us cellular.
thaitanium2012 said:
Hi, i've purchased an Galaxy S4 from the Usa but I live in germany. I need to know, if there is an way to unlock the simlock of the us cellular.
Click to expand...
Click to collapse
Have you read THIS ?
Yes, i'ved read this before. But what would you like to tell me? I've got a sim slot so there must be a way to unlock the simlock. Is there a method or not?
CarlM34 said:
Have you read THIS ?
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Click to collapse
Hey there..sir i check all thread but nowhere i cant found about uscc s4 sch-r970 for sim unlock..maybe we didnt figure out how to unlock it??i contact uscc and they told me that there is a code but theres not s4 time to get released..now what we do??

[Galaxy s5] Verizon - unlocked - can I install a different ROM?

Hey guys, so I bought recently a galaxy s5 in USA (I'm not living in USA).
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Right now its unlocked and I can use my own SIM card and it works just fine but I'm worried about the fact that I don't know how is unlocking works.. I don't want to install a different ROM and then my SIM won't work..
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[Q] Model # on AT&T question

Understand that AT&T has locked bootloader on S5.
Can anyone tell me which model I should buy that will work on the AT&T LTE network but has an unlocked bootloader and can be rooted ? Also understand that there seem to be several variants of S5 available like G900F G906S etc....
Anyone tell me which one to buy ? want to use AT&T but have full control on device.
Thanks
You should but the one from T-mobile it will work with AT&T but you will have to Sim unlock it and you will be able to install roms on it.

How to use AT&T s4 on international network

Hi guys one of my friends bought a S4 in the US, It's AT&T locked SGH-I337 so can't use it with sim in our country (South Africa)We have two models of S4 here, the I9500&I9505. Was wondering what the right steps is to get the phone working? Must I root the phone and flash custom Rom & kernel or just unlock sim card? I'm not new to Rooting or flashing Roms but haven't fidled with carrier locked phones before. And is it possible to use custom Roms from At&t in other countries thanks in advance [emoji2]
Send from my UNBENDABLE NOTE 3 ?<br/>
Send from my UNBENDABLE NOTE 3 ?
Leonidas300 said:
Hi guys one of my friends bought a S4 in the US, It's AT&T locked SGH-I337 so can't use it with sim in our country (South Africa)We have two models of S4 here, the I9500&I9505. Was wondering what the right steps is to get the phone working? Must I root the phone and flash custom Rom & kernel or just unlock sim card? I'm not new to Rooting or flashing Roms but haven't fidled with carrier locked phones before. And is it possible to use custom Roms from At&t in other countries thanks in advance [emoji2]
Send from my UNBENDABLE NOTE 3 ?<br/>
Send from my UNBENDABLE NOTE 3 ?
Click to expand...
Click to collapse
The Sgh-i337 is basically the same as the gt-i9505 EXCEPT for ATT locking the bootloader on that model.
You CAN Sim unlock it so you can insert your Sim into it. You will have to reach it a bit though. It helps if you know what firmware is installed on the phone. If it is MDB, MDL, or MF3 it would be easier to do I believe. Either way look for the threads about unlocking.
If you have NEWER firmware then there are separate threads for it, and it will more than likely need to be rooted, flash a older modem, then perform the Sim unlock from the menu. If you cannot find the correct post I can help look for it later.
Just reply back with WHAT firmware and Baseband you have installed on the phone and we should be able to help you further.
If you do have MDB or MDL firmware do NOF update it...
RockRatt said:
The Sgh-i337 is basically the same as the gt-i9505 EXCEPT for ATT locking the bootloader on that model.
You CAN Sim unlock it so you can insert your Sim into it. You will have to reach it a bit though. It helps if you know what firmware is installed on the phone. If it is MDB, MDL, or MF3 it would be easier to do I believe. Either way look for the threads about unlocking.
If you have NEWER firmware then there are separate threads for it, and it will more than likely need to be rooted, flash a older modem, then perform the Sim unlock from the menu. If you cannot find the correct post I can help look for it later.
Just reply back with WHAT firmware and Baseband you have installed on the phone and we should be able to help you further.
If you do have MDB or MDL firmware do NOF update it...
Click to expand...
Click to collapse
Thanks for reply ,I have NC1 firmware and I used Method 3 on this guide http://forum.xda-developers.com/showthread.php?t=2595457 .SUCCESS!
Could you recommend a modem I could try other than MF3 as the signal isn't that great ?
Leonidas300 said:
Thanks for reply ,I have NC1 firmware and I used Method 3 on this guide http://forum.xda-developers.com/showthread.php?t=2595457 .SUCCESS!
Could you recommend a modem I could try other than MF3 as the signal isn't that great ?
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Not sure which would work best for your area. You can download and try any/all of them until you find one that works best. You can switch back and forth with no issues without worries

help on my s4 will it get locked if i root and install custom rom

i got a galaxy s4 gt i9505 and i had it unlocked from 3 to any network in the uk and wanted to know if i was to root it and install custom rom will it be locked again to that one sim or will it still be unlocked thanks
badboy2a1n7867 said:
i got a galaxy s4 gt i9505 and i had it unlocked from 3 to any network in the uk and wanted to know if i was to root it and install custom rom will it be locked again to that one sim or will it still be unlocked thanks
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Click to collapse
Hi
If is factory unlocked or with IMEI code once is unlocked it stays unlocked....

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