No data after sim unlock - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

Hello, after unlocking my i337m i have no data, has anyone run across this before?
Need some help if you could. Thanks

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Network unlocking window not displaying anymore

Hi everybody,
I need some help with myTouch 4g. When I insert a different carrier SIM card the unlocking window is not displaying as normal. The phone is brand new, with default software and it is not root-ed.
Do you have any suggestion of how to solve this? I need to use the phone in other country so I need it unlocked.
Thanks!
The complete procedure to unlock & root is explained in this post.
Just go through it & do accordingly.
Hope this help you out.

Cannot Unlock Sim Samsung S4 Rogers

Hey Guys,
I have had one heluva time trying to unlock my Rogers Galaxy s4. I purchased an unlock code, which did not work. I tried through service mode. Then I tried flashing the rom to a factory rom, which has now disabled my cellphone reception. At this point I am trying to put the stock rom back just get my phone working. Is there anything else I can do?
FastGSM.com has been the "last resort / saviour" for many here when service menu didnt unlock nor purchased-code.
fastgsm
I also used fastgsm to unlock mu i337m using the usb unlock method
Never try it but it could maybe help you out ;
http://forum.xda-developers.com/showthread.php?t=2285431

[Q] Network Unlock

Hi there,
I'm having some trouble trying to unlock my samsung s4 (gt-i9505) and was wondering if anyone knew how to help.
I've tried using the FastGSM samsung client several times but that hasn't worked and then I tried unlocking via IMEI using a network unlock code but it still keeps saying unsuccessful. I've tried restoring the phone and still nothing
I've heard it could have something to do with the NVRAM but for some reason I can't access the main menu of the service mode to try and change anything.
Has anyone else had this problem or know what else I could try? I would appreciate it.
Many thanks.

Need help with removing SM-S550TL network lock

Anybody know of a free way to unlock this thing?
On5 SM-S550TL UNLOCKING
I have the same problem. Kingroot succeeded rooting it, but now how can I kick off Tracfone and use my ETECSA sim card?

How can I add my device for bootloader unlocking without mobile data?

Hey guys, so I accidentally locked my phone, and to unlock it again I need to add the device to my account then wait. But here's the thing, it won't let me do it on Wi-Fi, for some stupid reason it needs me to do it on mobile data only, which I no longer have, and i'm not gonna get mobile data just to unlock it.
Can anyone help me bypass this? I really wanna get rid of MIUI, it's so bad.
Thanks in advance for all the help!!
Bane1020 said:
Hey guys, so I accidentally locked my phone, and to unlock it again I need to add the device to my account then wait. But here's the thing, it won't let me do it on Wi-Fi, for some stupid reason it needs me to do it on mobile data only, which I no longer have, and i'm not gonna get mobile data just to unlock it.
Can anyone help me bypass this? I really wanna get rid of MIUI, it's so bad.
Thanks in advance for all the help!!
Click to expand...
Click to collapse
Nevermind!! I figured it out!! the device is registered even if it says it's not, so I just tried the usual bootloader unlock program and it worked!!

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