I recently bought an S4 from Sprint, but I'm working overseas in Vietnam. They assured me that they had unlocked the phone, but, well, it's Sprint and the phone wasn't unlocked when I put my SIM in. Therefore, I rooted and downgraded my baseband to MDC and did the unlock method, which worked. However, ever since then I haven't been able to receive calls (I can still make them though).
When people call me, the phone rings on their end but nothing shows up on my end.
Here are solutions I've tried:
- Various Roms (Jellybean & Kitkat)
- Upgrading the Baseband to MJA
- Clearing the Cache
Anyone have any ideas what the problem is? Thanks!