An orange point appears in the top of the phone when I make a-call
What’s (An orange point appears in the top of the phone when I make a-call)?
Beside the network signal
What’s (An orange point appears in the top of the phone when I make a-call)?
Beside the network signal
It means an app is using the microphone.
Your friends are wrong, see this > Status icons and symbols on your iPhone - Apple Support
If you see orange or green indicators in the status bar
With iOS 14, you might see an orange or green indicator in the status bar on your iPhone. These indicators appear when the microphone and/or camera are being used by an app.

An orange indicator
means the microphone is being used by an app on your iPhone.

A green indicator
means either the camera or the camera and the microphone are being used by an app on your iPhone.
Some friends say that means some app are hacking my iPhone?
thanks in advance
An orange point appears in the top of the phone when I make a-call