In an open letter Roz Ho, VP of Premium Mobile Experiences at Microsoft, apologises for the “recent problems”. She then claims that “most, if not all” of the data has been recovered and will be restored to the servers over the next couple of days.

Since the beginning of October, Sidekick users have had problems retrieving their data, leading up to the complete failure of the cloud-based service. Customers were advised to switch their Sidekicks off to prevent synchronisation attempts.