Hi Friends,

I have jailbreak and unlock my iphone 3g with redSnow and UltraSnow application but still not not detecting any SIM card. When i inserted SIM card. it doing searching for long time and give No Service error. When i am going Setting-- Carrier. its giving me error "Unable to load network list". Currenctly phone is having ISO 4.2.1 and Modem Firmware 05.15.04.

eariler iphone had OS 4.0. I have upgraded it to 4.2.1 from Itune with downloaded IPW file(Using Shift+restore option).

Please suggest on this.