Q: Call Volume Low Issue

Hello ramjas1309,

Thanks for that info and choosing the Apple Support Communities. I know how important having the volume work properly on phone calls is to you!

Based on what you stated, it seems you may be having the issue following an update. Good news is there are a couple of steps that can help.

1. Restart your iPhone, iPad, or iPod touch

2. Clear the receiver and microphones to make sure they are not blocked or dirty.

3. Test volume, also plug in headphones and test the volume issues.

4. Remove screen protectors, films, or cases that cover the microphone, iSight mic, or iPhone receiver.

5. To test the primary microphone on the bottom of your iPhone, open Voice Memos and tap the record icon. Then speak into the microphone and tap the play icon to play back the recording. You should be able to hear your voice clearly.

Get help with the microphones on your iPhone, iPad, and iPod touch
If you can't hear a person on a call or voicemail or if the sound isn't clear on your iPhone

If you're still having issues after these steps, you would want to have your iPhone serviced by an Apple repair tech. 

Cheers!