well I just wanted to re affirm to him, that his aids can be locked.
I he can’t find an option in his target to factory reset, he might have to send them in, or ask help elsewhere.
I only found this and can’t confirm:
All trial devices must be reset to factory settings at the end of each trial period. You can achieve this through the fitting software by going to [Trial & tools] > [Reset to factory settings] > [Reset].
If the hearing instrument cannot be connected to the fitting software or fails during fitting, send to GC for repair (repair fee applies if not in warranty, country specific) or, if not needed anymore, discard.
there’s also a “reset” my holding down the bottom rocker switch for 20sec. then putting them in a charger for 3 sec and taking them out. not sure if that helps with the PW.