Login to your Account Zone and then go to "My Details". Please note that all the information in your profile, all contact details, must be accurate. When you fill in your phone number please make sure it is in this format +(country code).phone-number. For example +1.XXXXXXXXXX.
Tip: We do not share your personal details with anyone. If you have a domain name registered with us, you have to have true web address, because ICANN requires any domain owner to have correct details in their contact information.