Some users maybe have met such problem that can’t hear the phone calls unless put it on speaker, but everyone can hear you fine. You take really good care of your iPhone 6 without any drop, impact and break. So how to fix the problem?
There are kinds of methods to fix iPhone 6 no sound problem. They Try to find the one suit your phone.
1. Clean the earpiece speaker mesh, blowing with mouth or just soak a piece of cotton ball with petrol and gently clean.
2. Just push the top area (near the speaker and front camera) by your thumb gently.
3. Sweet a little compressed air in the earphone jack.
4. Try to record a voice memo and play it back over the earpiece speaker as opposed to the speakerphone speaker.