O2 Pay & GO GO GO £10 for iPhone

For the price this looks unbeatable. £10 per month cap, which gets better over time. The best thing is (unlike most rewards), O2 reward customers after 3 months, then 6 months, then 9 months put you on the best deal at the same price.

How the deal works.
75 mins, 500 texts, 250MB +5% back on Top Ups.

After 3 months 02 double your allowance:
150 mins, 1000 texts, 500MB.

After 6 months 02 double your rewards: 10% back on Top Ups.

After 9 months 02 add unlimited texts: 150 mins, Unlimited texts, 500MB.

This is the only £10 per month iPhone sim in the UK, making O2 by far the cheapest and best!