Att iphone 4 (#1)

[iZIGGA]

I put my old sim card in my att version of my iphone. Im in a 4 bar area but im only getting 1 bar. Ive already sprayed air duster in it, nothing what else may be the problem?

 

[willerz2]

May be an old baseband problem. Upgrade your iOS to upgrade the baseband

 

[iZIGGA]

Solved! It was a loose antenna