I have a jailbreaked & unlock (3g 8Gb iphone) to Vodafone using yellowsn0w. I always had good signal (5 bars).
Last week I dropped now my phone about 2 feet to the ground. Now it says "no service". When I go to Reset Network settings, I get 5 bars and then they drop off one by one to zero and then no service. Where the 3g symbol is I have a circle and I keep loosing the signal. When I go to network selection sometimes Vodafone is not there but Meteor and O2 is.
Currently I am on Version 2.2 (5G77) & Modem Firemware 2.28.00.
Did the drop cause the loss of signal, all other functions (ipod, internet work).