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The only way to get signal to make texts and phonecalls is to turn 3G off, then I'm on 2G... It was fine the other day and now its like this, it's shocking...
Settings > General > Reset > Reset Network Settings.
Reseat/replace the SIM.
Contact the carrier.
Settings > General > Reset > Reset Network Settings.
Reseat/replace the SIM.
Contact the carrier.

Reply something about I'm on an iPhone 4 and every time I enable my 3G my phone loses total signal first searching then no service. After while it finds 1 bar and '3G' but no internet works no texts can be sent no phone calls can be made. or Post a New Thread