hi, i updated an iphone 3gs with baseband 05.11.07, to iOS 5.0.1, i used redsn0w 0.9.10b4 to preserv baseband and it is old botroom; it worked just fine but like a week later when u disable 3g or data it loose the signal, and u had to restart multiple times to get signal back; would there be a problem with the baseband ?