Custom roms - no mobile network

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http://forum.xda-developers.com – Hi, I cant get any mobile network on any custom rom. It does work on the ICS beta but its not a great rom imo. I have flashed jellybean, xpress ics rom, dark ics rom, and ICS 4.04 all from Shadowsnipers tutorials on youtube. Roms work perfect but never any signal - im with Meteor in Ireland. I tinker with the settings GSM only etc or wcdma or both but I get error when looking for mobile networks. Another problem I have is any custom kernel I use to flash a rom ( Lupus, Doomlord ). It installs the rom, but instead of rebooting, It always boots into recovery. The only way I can install a (HowTos)