sim manager not recognising sim and no data roaming or access to apn settings Galaxy S21 Ultra 5G SM-G998B/DSID sim is in sim #1, nothing in sim #2When I pull down quick links from top it does show ID Sim manager says nothing in sim #1 or sim #2 (cannot check under preferred sims as calls, messages, mobile data not selectable)Under Mobile Networks Data Roaming is not selectable, neither is Access Point Names or Network OperatorsSoftware is up to date & I have tried rebooting. Have tried turning on Flight Mode for 1 min. Other than mysteriously loosing internet for few minutes at a time last few days, able to access mostly. Not had any problem making calls except again few odd times last few days in places never normally an issue Anyone any ideas?