No service after reflashing to stock

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http://forum.xda-developers.com – Had my nexus rooted since day 1 and never had any issues. Lately i've been trying to use Barclay's Pingit app which doesn't work on rooted devices. So i reflashed to stock through the galaxy nexus toolkit. I did get service on the stock rom, but i've since tried a nandroid restore of my CM10 and it appears to have screwed something up. First off, the restore completed in 4 seconds, so it obviously didn't work. I'm using TWRP if that makes any difference. So i tried a wipe and flash other roms, but still no service. Even after going back to stock, still no service. I'm assuming the botched (HowTos)