[Q] I can't unlock my S4 AT&T (MK2).

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Thanks Meter: 0
By IagoFontana, Junior Member on 14th May 2014, 09:44 PM
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I used this thread ( for update my S4. And now i can't unlockt my S4. Can you give a hand?

I searched for it but did found. It's my third day without my cell.

I can: Root and install Safestrap, with it i dont have problem.

I try, but did not work: - Codes like *#27663368378#, *#0011#, *#197328640#*.
- RegionLockAway
- Change de modem to MF3,MDL.

Model: SGH-I337 (AT&T)
Android Version: 4.3
Baseband version: MK2

I buy this S4 in EUA and now i need use in Brazil. :/
19th May 2014, 09:29 PM |#2  
Senior Member
Flag Odessa
Thanks Meter: 26
I have an AT&T S4 with MDL baseband that I bought a year ago.
I rooted the phone after I received it.
After the root I tried free sim unlock methods that posted on the net and none of them work for me.
Finally I bought the code (I think it cost around $30 and I had to provide the IMEI number of my phone).
It may or may not answer your question but I just want you to know what did work for me.
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