I just bought the Auto 3G app from Cydia after hearing it was a must have app for saving battery life. However when my phone has been idle for a while and auto 3g kicks in, when I unlock the carrier logo disappears for about a minute and I have no signal in this time. This means that any phone calls that I answer are cut off and it means I cannot quick reply texts as fast as I would like to. I have tried playing around with the settings but nothing seems to fix this. Does anybody have any ideas?