More details emerge on Sidekick data wipeoutThis article contains unofficial information.
The plan now is to get those Sidekick users who still have some data on their device, to sync back to the servers to keep the data they have. Apparently, this series of events have been reported by a number of sources, according to Hiptop3. The bottom line, according to all of them, is that Microsoft failed to make a back-up of the data. Don't think that this is going to go away quickly. In this day and age of litigious people suing over too-hot coffee, losing important data from a network sounds like a class-action suit. And with deep-pocketed firms like Microsoft and Deutsche Telekom possibly involved, lawyers will flock to this case like bees to honey. The only good thing about that is the truth might come out and other carriers and network operators might learn a lesson so that this is not repeated.
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source: Hiptop3 via EngadgetMobile