hi! i recently had my phone jailbroken when i started to notice that my iphone 3g(6.15.00 bb) would not pick up wifi signals in range. my girlfriends ipod touch would pick up the signals but mine wouldnt. so i tried to restore it and it gave me a problem, but i got it restored and downgraded to 3.1.3ios. but after all that my iphone still will not pick up signals in range. could it be the 6.15.00 baseband? or could there be another problem behind it? please help!