If you have a registered ID which is not authenticated (not active) so you wouldn’t be able to use that ID for chatting but you have an unregistered number and you don’t want to change your ID and want to keep the same user name. Don’t worry; here is the solution to active your ID. Log in from that inactive ID ->> Select the [Resend code] option, type your unregistered number in the box ->> Then press [Continue]. After that an authentication code will be sent to that number you just provided ->> Now select [Enter code] option and put that code in the box and press [Continue]. A confirmation message will appear of your successful authentication. In this way you can active your inactive IDs.