The Microsoft servers keep Sidekick users' data because when the device is turned off, the battery is pulled or the unit reset, the memory on the device is cleared. The servers copy the data so that the info can be restored to the phone when it is turned back on. With the servers not working correctly, owners of the phone are told not to turn off or reset their machine or cut the power to it. If the servers are not working, any info left on the phone may not be saved when the power to the handset goes off. But the good news is that T-Mobile and Microsoft now have given a little more than a glimmer of hope to Sidekick users that all of that data-once thought to be permanently lost-will be back right at the fingertips of Sidekick owners. If data is returned, we are not sure how this will affect the $100 credit and one free month of service that T-Mobile was giving to users of the device. It also isn't known when or if the carrier will resume offering the handset for sale. As we reported, T-Mobile has currently pulled the Sidekick from its line-up.
T-Mobile Sidekick LX 2009 Specifictions | Review