iPhone 12 requires speaker phone to hear callers

Hello~ Click on below and review as likely there is a hardware issue…

If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker - Apple Support

If the microphones on your iPhone aren't working - Apple Support

Also…

Genius Bar Reservation and Apple Support Options - Apple

Find Locations

~Katana-San~

Most likely a hardware issue that will require diagnostics by Apple. Before that is done, you can always try to do a Factory Reset to rule out the software as being a cause.

How to factory reset your iPhone, iPad, or iPod touch - Apple Support

Red_Flamezz12 wrote:

I’ve done all these things I’ve seen in the article above, still the same issue

Then it's time to have Apple look at the phone:

Genius Bar Reservation and Apple Support Options - Apple

Hello~ You can always let Apple know your thoughts as well by clicking on below…

Product Feedback - Apple

Apple doesn’t participate here in that way …it is mainly just us your fellow forum members.

~Katana-San~

OllieTheOctopus wrote:

Yes, using the volume control was the first thing I tried, during a call.

Then it's likely you have a hardware problem.

A 'me too' post. I've had this for a while on my iPhone 12 Pro. To be clear, it's not that there's no sound, or it's distorted. It's just really quiet, and I've tried all those things too, without success.

OllieTheOctopus wrote:

A 'me too' post. I've had this for a while on my iPhone 12 Pro. To be clear, it's not that there's no sound, or it's distorted. It's just really quiet, and I've tried all those things too, without success.

It sounds as if your problem might be different. However, the solution at this point may be the same: make arrangements with Apple to have diagnostics run.

Note that adjusting the volume while not on a call doesn't adjust the call volume. You can only adjust call volume while on a call.

Yes, using the volume control was the first thing I tried, during a call.

I had also worked that out.

Part of the point of community support forums is so the product manufacturers and users can get a feel for the size of the problem. That was why I posted.