I recently bought a used XT926, rooted it and unlocked the bootloader flashed the radio for ATT/TMobile GSM and installed CyanogenMod 11. Then I put the SIM card in and it won't read it or a few other good (and bad) sim cards I have in my possession. I have access to a few other XT926's and these same sim cards do work in the other phones. (These phones range from set up just like the one above to an unlockable but rooted phone with latest OTA). Back to the phone I am having problems with:
When I put the phone into airplane mode and back out, the phone temporarily shows signal (not data though) but won't make calls and after a few seconds shows no sim. A couple of Sim card reader apps show card not inserted. I popped the LCD off and looked at the reader, no apparent damage. I have reflashed the phone using rsdlite back to 4.4.2 183.46.10 as well as 4.0.4 still nothing.
Could this be software related? I am in the process of returning the phone, but the seller has not responded so I imagine it will take a good week so until ebay steps in. So I figured I'd put this post here to see if anyone has any suggestions. If I can get the phone to work I'll keep it. I've searched the forums and not found anything useful to try.