If the holiday season didn't manage to bait you into a new phone, this might be your chance: T-Mobile is having a three-day "New Year, New Phone" sale this weekend only, beginning on Friday, January 6.  Sure, there are mail-in rebates involved, and you'll have to make a monthly payment ranging from $10 to $20 on the device itself, but a $49.99 down payment on a Galaxy S II or an Amaze 4G is hard to pass up. Other Android devices pegged at the $49.99 sweet spot include the Sensation 4G, the myTouch 4G, the Springboard, and the G-Slate. The source link has a full list of devices on sale, along with the corresponding mail-in rebates and monthly payment information. 

Source: T-Mobile