Customer site has a dozen or so 2170’s and 2160’s.
All phones have custom ring tones.
All phones have been working for a couple years with no complaint.
One phone decided to starting using the original factory ring tones. Even if I log into the phone and change the ring tone, it’s always using the "You have a call from … " ring tone with is awful for the professional environment it’s in.
I’ve factory reset the phone and, frankly, I’m not sure how to trouble shoot this. At the time the ring tone changed, no firmware updates had been made for weeks, possibly months. I could updated firmware but, I’m not sure that’s a solution either.