If you are looking for a new mobile phone then you would be silly not to consider a 12 month free 12 month contract.
As the name implies, with a 12 month free 12 month contract you get 12 months free line rental, including a free handset, free air time and free text messages all in one bundle.
The name is a little misleading, as you od actually have to pay for your line rental in the initial months, and claim it back at a later point, however if you follow the instructions and terms of the contract, make your claim properly and on time, then you can get a free line rental deal no problem!