Question [Q] Xperia U always Died After inserting Sim Card

Hi i have an Xperia U now loaded with thebrainsROM i noticed there is a problem after i inserted the SIM Card then it will hang or simply turn off by it self..first i thought it was because of the ROM or kernel so i tried to install several other ROM (with no success got a message of error code 7 when flashing using CWM Touch 5) so it is still stuck on the thebrainsROM, but if i put the Phone on Flight Mode or i simply put the SIM Card out of the phone then it will works fine...does anybody have some similar problem?...