Speaker rattle When I take calls there is an annoying crackling/vibrating sound on the Galaxy Ace earpiece speaker, but NOT with the external speaker when I put it on speakerphone. It sounds like the speaker itself is rattling(like phar....phar.....phar sound) or something. This gets better if I lower the volume to about half volume, but then it is too soft to hear well. The external speaker is fine and bluetooth to the car is fine so I presume it is the speaker itself.

SOURCE: Nokia N73 speaker fault?

try cleaning the mic first before replacing it..this usually does the trick..theres probably dust on the mic.

SOURCE: Samsung u740 no caller sound

needs a new speaker. can be replaced for as little as $30. if you're in Sacramento, CA, you can go to Cellular Solutions in the Downtown Plaza. it should be a quick 20 minute fix.

SOURCE: no sound from earpiece speaker on nokia 6085 phone

You most likely need a new ribbon cable, which is the cable that connects the two halves of the phone. They are not expensive and can be ordered on eBay, and they come with the tools required to disassemble the phone and replace the cable. My 6085 did the same thing and replacing the ribbon cable fixed the problem.

SOURCE: env2 vx9100 call volume soft

We have 3 ENV2's in our family. None of them have volume problem. The speaker phone is especially loud when used in indoor environment. It is so loud that I have to turn the volume way down when used with good quality ear set. You probably are right about the phone being defective.

SOURCE: Iphone 3G speakerphone and headset volume is too low

Whilst on a call in bluetooth mode change the volume. It needs to be for each different "speaker" you use