Can't people work stuffs out themselves, or do you just like giving me little jobs to do?
Okay, I'll take the 16Gb iPhone 3GS as the base example to work it out.
Monthly (24 month contract)
£29.36 / month
£125 phone cost
150 minutes
250 texts
750 Mb internet usage
Total cost over 2 years:
£829.64
Pay as you go
Unlimited Texts £10 /month
Calls 20p per minute (sorry, only you can work out how much you use the phone).
12 months free internet usage
12 months internet usage at £2 per day (I'll say maybe you use it half the time)
£440 phone cost
Total cost over 2 years
£1045 + you calls
That's if you were to use the iPhone in the same manner you would pay as you go and contract. It's not a 100% accurate costing, but it does show that really, you're much better off on a contract.
Sources
http://interest.orange.co.uk/#iPhonePAYM
http://www1.orange.co.uk/service_plans/ ... 918%29.pdf