Source
Verizon 3G iPad 2 owners have a reboot issue
Ever since Verizon rolled out their CDMA iPhone 4, it has certainly impressed in terms of sales, but not everything is fine and dandy for the Big Red camp since there are growing reports that Verizon's native iPad 2 gadget is experiencing reboot issues – users have complained that their magical tablet need to go through a reboot process if they want to hook up to a 3G network after turning that feature off. While Wi-Fi works just nice, 3G connections will take at least a few minutes – and in some cases, not at all. No idea on what's causing this, and even making a trip to the Genius Bar has failed to yield any working solution. So far, we do know that the most recommended procedure would be to turn the cellular data switch on, power the iPad 2 down, power it up, and turn on cellular data since the data switch is already on. The grass isn't really greener on the other side now, is it?
Source
Source