One of the best things about an iphone in my opinion is the ability to customise it with apps. The O2 app is brilliant and allows me to keep track of my bills and allowances, ensuring that I am not overspending without realising! To begin with, you need to be a customer of O2 and also have an online account with them, through which you can also manage your bill. Once you have an online account, you then download the iphone app and use your login details from your online account to reigster that account to the app on your phone. A plus point for this app is that once you have intially linked it ...
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