So, a Nokia 130 for 0.79p. Great for nights out, festivals and other drunken occasions where your likely to lose it anyway and be glad it wasn't your more posh smart phone. Also good to suprise the children on their birthdays when they thought they were getting an iPhone and is even different enough to use to strike up conversations with girls and grannies who might think you are "Retro" and therefore trendy.
If you don't have an EE account, it looks like costs £10 for a top up (no you cant buy a week top up) and unlocking appears to be free through EE. So, worst case is it might cost you £10.79http://ee.co.uk/help/getting-started/joining-ee/unlocking-your-device