Address Book</b>. You can use the contact upload feature and provide us, if permitted by applicable laws, with the phone numbers in your mobile address book on a regular basis, including those of both the users of our Services and your other contacts. Learn more about our contact upload feature here.</p> <p> <b>Age</b>. You must be at least 13 years old to register for and use our Services (or such greater age required in your country or territory for you to be authorized to register for and use our Services without parental approval).