Do almost all modern smartphones use piezoelectric speakers for both the ear speaker and the speakerphone speaker?
The reason I ask is because I rinsed off my waterproof smartphone (which I've done dozens of times) and the speakerphone speaker now sounds horrible: the volume is very low and the sound is exceptionally "tinny".
Its done this before after rinsing it off, and I can usually just make a call on its speakerphone to resolve the issue. But this time, after making several speakerphone calls and letting a single bass-filled track of music play repetitively for an hour, the sound quality is still poor.
In order to determine how to hopefully resolve this issue, I first need to understand what type of speaker is likely involved. The brand is Samsung, if that matters. Is it almost surely piezoelectric?