How to test ear speaker on iOS 12 revamped voice memo app?

"Hi,

I found a solution call emergency services with one this numbers 911 or 112 or 000.

I succeeded to test the ear speaker and the proximity sensor but, for the ear speaker test, it’s only 3 beep when, the call end automatically.

PS : Don’t worry, you don’t call emergency without cellular network."

Phone call is the only other quick option I could think of :(

You can buy a cheap pay as you go sim for £1. Don’t credit it. Put it in the phone and call that number from another phone. You can answer using the earpiece.

I found a solution for this. There is a free app called Test M. It tests everything on the phone. You don’t have to do all the tests if you don’t want to. You can just select the hardware icon and then test the ear speaker. A voice will say three numbers thru the ear speaker. They then want you to put the numbers in so the app knows it worked, but of course if you hear it, then your test is over.