After following the guides of:
tRexDestroyer
gheylien
DirtyDan
And others.
RCS is still stuck at "Trying to verify your phone number..." With rooted graphene on 8 pro. Even with all permissions for play services, carrier services and messages. Device identifiers set with app ops and verified with adb/aShell. Reboot in between each step with version 242499063 with cleared storage. If anyone has any other idea, I'm all ears!