Hi all,

I've got a Sidekick LX 2009 that I'm trying to use with a T-Mobile prepaid sim. When there's no sim in the Sidekick, it displays a message saying a T-Mobile sim is needed for service. When I insert my sim into the Sidekick, the phone does not display this message... but instead flashes "SIM?" where the signal bars should be. The sim is good and works fine in all of my other phones.

I've tried hard resets to no avail. While searching the net, it seems like other Sidekick owners have also had this problem when swapping sims from one phone to another. The Sidekick works fine until they swap the sim into another phone... then when they put it back into the Sidekick it flashes "SIM?".

Any ideas? Thanks much!