problem hearing phone calls on my iphone 6

Howdy himanshumarothi,

Thanks for using the Apple Support Communities.

I see from your post that your headset plugged into the iPhone is not functioning properly. To help troubleshoot this issue I'd like you to please follow through the steps outlined below.

You can fix most headset issues with a few steps. Try these first:

1. Make sure that the headset has a built-in microphone.
2. Unplug the headset and clear any debris from the headset jack. Then plug it back in.
3. Make sure the headset is plugged in all the way. If you’re using a case, remove it to make sure it’s not getting in the way.
4. Check the headset cable, connector, remote, and earbuds for damage. Make sure they’re not blocked or dirty.
5. Try using another headset. If the issue happens with the other headset, contact Apple Support for help. If the other headset works, contact the headset manufacturer.
6. Try using a different iOS device with your headset. If the issue happens with the other iOS device, contact the headset manufacturer. For Apple headsets, contact Apple support.

If your headset still isn't working, follow the steps below for the issue.

If you can't hear through your headset

1. Adjust the volume on your iOS device. Try using the volume buttons and the Volume slider in Control Center.
2. Unplug the headset to check if you can hear from the speaker on your iOS device. Can't hear from the speaker?
3. If you can hear from the speaker and you still can't hear from your headset, contact the headset manufacturer. For Apple headsets, contact Apple Support.

If your headset isn't working - Apple Support

Have a good one.