Mine is doing the same. Go to make a call, press phone icon and get white screen and then it freezes. App eventually snaps close. Then the phone becomes unresponsive and won’t open any apps. Then eventually it goes to the phone screen but won’t connect.
It drops my Bluetooth connect/ reconnect.
My network signal also fluctuates. Randomly.
When I check my voicemail it freezes.
Text- screen stalls and hangs up, then crashes.
Phone calls go straight to voicemail. Never hear it ring, no alert notification.
Safari- Stalls and Lags to open
What I have done so far:
I have shut the phone down.
I have restarted multiple times.
I connected to iTunes and redid the update /restore
I have reset all network settings
I have done the most recent patch.
I did the accessibility- motion reducer -enable