[Q]Sony LT28i AT&T SIM card problem
Sorry if there're any similar posts (couldn't find the exact same problem).
My phone is Sony Ion LT28i (bought in Taiwan), and I just got a new AT&T micro SIM card 2 weeks ago. Everything went well until yesterday, when I found my phone couldn't dial out or receive any calls. Occasionally
, there're AT&T signals, but everytime I tried to dial some phone number, this just won't work.
Here's what I've tried so far, but all not working:
1.plug the AT&T SIM card to my HTC wildfire S, and it functioned; plug in other micro SIM cards to my LT28i, still not working. So I guess the problem is not the SIM card but my LT28i.
2.guessing it's a software problem, I flashed to LT28h JB 4.1, and flashed back to LT28i ICS 4.0.4. Both can't solve the problem.
Could someone please help me solve or explain this problem? Thank you!!!