Hi,
Thanks for the reply.
I'm using Xperia ZL (C6502). Not Xperia Z.
I did not backup my previous rom. Here is several rom that I try and doesn't work.
1. FTF] C6502 10.3.1.A.0.244 Unbranded MY 1270-1854_R6B
2. [FTF] Xperia ZL (C6502) - 10.1.1.A.1.253 - Indonesia 1270-1844 R9A Firmware
3. Xperia ZL (C6502) - 10.1.1.A.1.253 - Generic US 1270-7577 R7A -
4. [FTF] Xperia ZL (C6502) 4.2.2 - 10.3.1.A.0.244 - Generic US
5. 4.1.2 - 10.1.A.1.434 - GLOBAL
6. [ROM][LB][UB] eXistenZ v1 | Ultra Edition | 4.2.2 | 10.3.A.0.423 | FULL HONAMI
7. Xperia_ZL_C6502_10.1.1.A.1.307_tw.ftf
All the rom come from XDA forum. I ask for help there but 0 reply. I had tried previous 4.1.2 rom, both tw and indonesia version should be close enough to us. ( I couldn't find MY 4.1.2 rom). And still none of that work.
I even try existenz's rom, also same problem. but one thing to mention, when using this rom, on lock screen when signal lost, there is one line saying 'No Sim card. Pin1 Blocked. Enter PUK1 or please see the user guide'. However the phone will then detect the sim automatic. Its the same problem as other rom but with one line of explanation.
sound like hardware issue to me... try flash back to stock region firmware before send for warranty.