Answer to "Ear speaker low sound when making calls"This may sound a little awkward and problaby a bit unhygienic but ive had serveral phones with low/rattling earpice sound. This universal quickfix have worked everytime for me. No need for tools at all and you dont risk to destroy you phone due to opening it. Use the tip of your tongue and lick the net. Then suck the net and after that clean the net with something small. Repeat 3 Times. The earspeaker sound will be as new.