If you lose your speaker again try playing music then pressing on the speaker to see if it starts working. This happened to me and it was the result of a loose speaker connection. Replaced my Maxx under warranty. Good luck!Today my speaker gave out, weirdest thing, it just doesn't play any sound anymore. Tried phone call, music, power down, reboot, wipe cache/dalvik etc and still nothing. I then reverted back to previous version and voila, sounds again. I seems to run into too many weird issue with this version so I guess I'm sticking with previous one, havent ran into any weird issue with that one yet (knock on wood).
Sent from my Droid Razr Maxx using TapaTalk 2