iPhone 7 plus no sound bottom.

[lolxxxx]

Hi,

I was swimming in the mean time I used my mobile to take snaps and videos.
But now I am having no sound from the bottom speaker.
Can you tell me how to fix it? I have put the mobile in non-baked rice lets see if it gives me something.
Also If I want to repalce it how much it will cost?

Regards