Why does my Panasonic phone change some settings by itself?

Not new. Suddenly for no obvious reason, as soon as incoming call rings, states aloud details of the caller. Also, suddenly and for no apparent reason begun beeping for call waiting (not previously a feature of the phone setting). Panasonic and the service provider are naturally no help whatsoever. What causes this kind of uncommanded change of setting? Could it be an effect of the electric storm we experienced recently?  

Did you install or are you using any app that has something to do with ringtones? I'm thinking an app may be causing this.

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