This Samsung Galaxy S II deal is ideal for light users, or you could effectively grab the phone SIM free and pay it up over two years. According to my calculatrix, £15.50 per month for 24 months works out at £372.
The monthly T-Mobile allowance includes 100 minutes, unlimited texts, and 250MB of data.
We gots Samsung Galaxy S II specs.
(Thanks to zyany at HUKD)