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Why not join lots of existing O2 customers who already use the My O2 app to access their mobile accounts quickly and easily?As a pay monthly customer you get access to:•A full itemised bill including your most expensive, longest and most frequent calls•Fully itemised recent charges to your account since your last bill•All syncing with your phone book contacts so you can see who you’ve called and texted•Six months detailed bill history •Notifications on the homepage to let you know when you’re running low on minutes, messages and data•View your next upgrade date•Add data Bolt Ons when you’re running low on dataAs a Pay Monthly or Pay & Go customer you can view:•Tariff details and calling plan costs•Allowances of minutes, messages and data•Bolt Ons (value added extras)•Top Up or pay your bill using our automated call services•Comprehensive help and advice at the touch of a buttonAccess to the My O2 app is simple. If you're a Pay Monthly customer just use your My O2 online credentials to sign-in or get a reminder of these at http://www.o2.co.uk/myo2. Pay & Go customers can sign up at http://www.o2.co.uk/register. A four digit PIN keeps your account secure. Need help signing in? Click ‘Forgotten sign in details’ or click for help at any time in the My O2 app.Please note:-The My O2 app is not available to O2 business and corporate customers. -When using this app abroad, data roaming charges apply.