No cell network

Hi mefernandez,

sorry about this problem. I'm pretty sure, it's very annoying.

Did you already backup/recover your iPhone via iTunes?
Again, before restoring your iPhone, create a backup to safe all your informations saved on your iPhone.

Be sure to restore to factory settings first (no backup) and find out if this problem is still present.

If not, you can transfer all your informations from your backup back to your iPhone.

If this signal problem still appears, it's a hardware problem -- so you need to call AppleCare for help to get a replacement product or you just to a GeniusBar at nearby Apple Retail Store.

Good luck,

--sebastian