in reply to: GSM signal is weak
i used to have this problem before
in my case , when signal lost i switch to airplane mode and switch back then the signal ‘ll recover
another solution is download https://market.android.com/details?id=com.homer.signalreset&feature=search_result this app , it’s automatically switch to airplane and switch back to normal when the signal loss
may this app help you 🙂
sorry for my bad english