I have Marvel Naida SP 90 and have trialed Paradise Naida UP aids and I had trouble with phonecall static and disconection in my home and hospital situation.
My audio had me reset Bluetooth by removing then repairing the Phone, no good. Total reset of phone, no good,. Reinstalling MyPhonak, still no good.
While inspecting the phone I noticed it was conected to Wifi for calls, this eas the problem.
Wificalling sends data in packages not a constant fluid flow and this can cause jumble and stuttering.
I removed the Wifi calling a week ago and now no drop out.