Problem to re-unlock
Sorry for my bad english.
I have in hands a SGH-M919 (Galaxy S4 T-Mobile).
A uncle bought it in USA, locked in T-Mobile. In another place he unlocked it with the free method what we can found in Internet, and it works perfectly. A weeks later, by things of warranty, him had to re-lock the phone.
Now i'm trying to re-unlock phone with the same method and it doesn't works, SIM card requests me a "unlock code" (My SIM doesn't have PIN Code, i use it in my GS3) i push "Discard", and in the notifications bars shows me "Invalid SIM Card. Insert a valid SIM Card"
I was doing the method 2 or 3 times, to verify, but i can't re-unlock the phone.
What i can do?
Flash the phone with Stock ROM?
En caso de que al flashearlo me siga pidiendo el código, ¿Vuelvo a ejecutar el tutorial con el teléfono recién flasheado?
If the phone requests me the unlock code after flashing, i could try to make method again with phone flashed?
Another think that i was thinking is root phone, and use GalaxSim Unlock. But unroot and relock in case of warranty..
I hope you can help me!
Regards, a new user of the community. Juankox.