Give advice on how to implement this feature using id_token_hint
I don't understand this topic.
Is this really about the id_token_hint or is this a typo?
If login_hint_token was meant: We currently discuss the next version of Mobile Connect Profile with GSMA. In this version login_hint_token will be incorporated.
pcr as login hint is no longer necessary as Mobile Connect profile upgraded to use login_hint_token.