Took my phone into an Apple Store this afternoon for a screen replacement. When the specialist found it had the current beta installed, she said it had to be erased and reinstalled with the non-beta OS before they could do the hardware repair. Turned out they couldn't replace the screen anyway due to the crack location interfering with the suction cups. Gave me a new phone, but I couldn't restore it from icloud backup at the store due to non-beta operating system, plus needing a verification code from my device back home. Returned home and am nstalling the beta now as part of setup, hopefully the backup works properly. Knowing now about the gotchas, I'm staying with regular OS 15.5 when it drops and from here on out.