Hi
The deal of the day from Tescos is that if you buy £20 airtime for tesco mobile (pay as you go) you get a free motorola F3 phone (including a tesco mobile PAYG sim)
Its not exactly a feature rich phone (the usual price at tesco is £19.97) but would do if you don't need the extras like bluetooth, camera, etc etc. Or as a spare phone in case your proper one breaks! I think it looks nice at least, not a big brick like the more simple phones used to look like.

I can certainly recommend Tesco mobile as a PAYG provider, they are ace.

http://direct.tesco.com/promo/?id=S00004065

Check for discount codes to use at direct.tesco.com