T-Mobile offered a hope to Sidekick users who’ve been unable to access their address books and other data following a server failure at Microsoft subsidiary Danger. "Regarding those of you who’ve lost personal content, T-Mobile and Microsoft/Danger continue to do all we can to recover and return any lost information." "Recent efforts indicate the prospects of recovering some lost content may now be possible. We will continue to keep you updated on this front; we know how important this is to you." “T-Mobile’s promising a $100 "customer appreciation card" to anyone whose data can't be recovered, in addition to the month's worth of free data service already extended to Sidekick users,” explained Microsoft.