OK, may have been covered but what exactly does this mean for us o2 customers?? Is it purely about keeping your phone number. Text from Apples web site. Existing O2 Customers If youre an existing O2 wireless customer on a qualifying tariff, you will have the option of keeping your existing phone number and upgrading your account to work with iPhone. iPhone plans include Visual Voicemail, SMS text messaging bundles and unlimited mobile data usage, which includes both email and web.