If you took a contract with O2 when the iPhone 3G first came out, it is very likely that you are coming to the end of your contract right about now. I was in the same position and was getting increasingly annoyed at what I was getting out of my £35 a month. Instead of going with what o2 would like us all to believe, I decided to look around for the possibily to pay less while maintaining the features I regularly use.

The biggest problem in finding a cheaper tariff was keeping the unlimited internet use within the UK. I don't want to pay seperately for this as I use it more than I phone with the iPhone 3G. After much searching, I managed to find that O2's Online Simplicity 20 tariff currently comes with a bolt on bonus for free. By default this is set to unlimited O2 to O2 calls but by pressing an obscure 'change' link you can actually add this to unlimited web - perfect for iPhone users.

What you end up with:

• 700 Minutes
• 1400 Texts
• Unlimited Web (UK)
• 30 Days Notice (No long-term contract!) 
• All for £20 / Month - £15 less than the contract most iPhone users pay!