The problem might not be the earpiece speaker! I replaced mine and had no improvement in quality. After reviewing forums, I suspected the earpiece screen was dirty/plugged. I disassembled the phone again, removed the earpiece speaker, carefully scraped and poked at the earpiece screen until a flashlight revealed the holes were clear. After a quick reassembly, playback of a voicemail verified full volume has been restored. Since you’re in there anyway, whether the problem is the screen or the speaker, clean the screen and replace the speaker.
Lorsqu'il en aura reçu, il pourra afficher un graphique de sa réputation au fil du temps.
Voici un aperçu de ce à quoi ressemble ce graphique :
Aucun point de réputation obtenu pour l'instant.