You can deregister or unbind any registration information with us on BoC Pay 's "FPS Registrations" function (Select "Settings" in the Menu. Select "Payment Settings" then "FPS Registrations"). You can also deregister / unbind any other bank's registration information by enquiring about the FPS system's record on "Enquire registration records". After deregistration / unbinding, you will no longer be able to receive funds with the previous mobile number / email address. If you have deregistered / unbound your registration with us but have kept the registration with other banks, you can still receive funds at other banks with your mobile number or email address.