3.6.1 Log in option on mobile RCS clients

On the first screen of the mobile client are two options – sign up and log in. When Log in is chosen a screen appears asking for entering phone number or username. By default a user has to enter his password even though the selected public ID is phone number.  

Another option, which can be enabled on request during the customization of the RCS clients is that a user enters phone number used during the registration. The EMCD sends then an SMS with code to that number. The user will have to type the code received on another phone into the one he wants to log in.