I purchased my Blackberry Curve 8520 about 18 months ago on an O2 contract at The Carphone Warehouse. I got it at a bargain price of £15 a month (without any extra payment for the handset), for 24 months, with unlimited texts and 100 minutes. I also got the option for an extra £5 a month to have unlimited data (internet). As far as I know this is the cheapest contract you can get for this particular phone, and I have found it perfect.

The handset itself is very good, with a lot of useful features. The QWERTY keyboard is excellent in writing text messages and emails, and it allows you to do this very quickly. The Blackberry messenger is also excellent in keeping in contact with friends. You can download different Apps from the Blackberry App World (many apps are free) and this is excellent for upgrading your phone, and keeping up to date with new games etc.

The phone is very durable and should last you a long time. Mine has even survived a trip into my friends hot tub!!

On the other hand, the camera on this phone isn't excellent, and the phone can sometimes freeze or crash which can be very annoying.