The camera mirroring function of iPhone 4 is usually related to the front camera. Turning off this function requires operating in the phone settings.
1. Open settings

- On the home screen of your iPhone 4, find and click the "Settings" icon.
2. Find camera settings
- In the settings interface, swipe down the screen until you find and tap the "Camera" option.
3. Turn off the mirrored front lens
- In the camera settings interface, find the "Mirror front lens" option.
- If the switch button on the right side of this option is green, it means that the mirroring function is on.
- Click the switch button and adjust it to gray to turn off the selfie mirroring function.
Through the above steps, you can successfully turn off the camera mirroring function of your iPhone 4 phone. Please note that different versions of iOS systems may have slightly different interface layouts and option names, but the basic steps are similar.