iPhone 3g, 4, 4S signal problem on 3g

Hello friends,

I have this bad problem with my new iPhone 4S that the signal keeps coming and going and 3g is bad…

signal goes every now and then… I restored it few times…. same problem…

so if you have the same problem, then try this..

Get your SIM card changed
or
cancel the SIM PIN lock
or
restore to factory settings and set up as new iPHone.

or

go to apple store..

if any of you have the same problem.. please share with us what you did to get it right??

Share in the Comments please….