Agree with the "throw it away" crowd - they're so cheap these days that you can pick them up from friends for free when they upgrade, or off ebay for a few quid if you just want a phone and not the latest all-singing gadget.
It would be worth keeping the SIM card and checking to see if that still works in another phone, but if not just restore your phone numbers from your SIM backup ... you do keep a backup, don't you?
