I've installed nAa-Kernel and later CM7.2.2. (step by step as explained in CM7.2.2 thread). I did this without SIM-Card (should have no influence - or?). Everthing seemed okay, but later I inserted SIM-Card - no GSM. Also in network-search no other operator (i tried this with two SIM / ePlus /Tmobile - normally good signal strength at home). Wifi is working.
I tried PC Companion and Seus without success. After flashing Stock-Rom didn't work. After boot and PIN insertion no launcher appers, no GSM, no functions. Only the blue background picture of Sony launcher, and notification slider works.
I tried to flash Stock kernel (Paul-xxx has uploaded long time ago), but it didn't help. And I found no other Kernel - al links are broken.
So at the moment I've installed XMP-Rom, generell function are okay but I can't call. This reduces the sense of a mobile phone a little bit ;)
Any ideas / solutions?