Iphone 3Gs "weak signal' hlp pls..
 

Hi brothers , i got Iphone 3Gs just upgrade iOs 4.1 (Firmware 05.12.01) jailbreak&unlocked, everything work great , but the signal is so weak, when i go at basment of house i left with no service.

Anyone have any idea where is the problem. thnx for support.

I have the same problem, any ideas?

try changing antenna (it is located on the bottom of the dock assembly)