If you buy or upgrade with T-Mobile between November 1 and Christmas Eve, the network is offering £20 of free Android apps. Appy Christmas indeed.
Apps can be downloaded from now till 31 January 2012, and included are Doodle Jump (normally £3), Call of Duty Black Ops (normally £5) and PDF scanner (normally £3).
Maximum seven apps.
(Thanks to Obiwan at HUKD)