This is form just one part of the exptensive Ts and Cs

3. Use and Disclosure of Information

3.1 You authorise us to use and disclose, in the UK and abroad, information about you, your use of the Service (including, but not limited to, phone numbers/email addresses of calls, texts and other communications “Communications” made and received by you and the date, duration, time and cost of such Communications), how you conduct your O2 Calendar and/or O2 Joggler and your location for the purposes of operating your O2 Calendar and/or O2 Joggler and providing you with the Service or as required under law to our associated companies or agents, any telecommunications company, debt collection agency or credit reference agency. You agree that the information may be used by other parties in assessing applications for credit from you and members of your household and for debt tracing, credit management and may be used by us or other parties for crime and fraud detection and prevention.

3.2 You also agree to the information described being used, analysed and assessed by us, and the other parties identified in clause 15.1 and selected third parties for marketing purposes including amongst other things to identify and offer you by phone, post, the Network, your Mobile Phone, email, text (SMS), media messaging, automated dialing equipment or other means, any further products, services and offers which we think might interest you. If you do not wish your details to be used for marketing purposes, please write to us; c/o The Data Controller, Telefónica O2 UK Limited, 260 Bath Road, Slough SL1 4DX or you can email us at mycare@o2mail.co.uk stating your full name, address and Mobile Phone number.