With the Guide Access feature in the iOS operating system, you can prevent others from exiting the current app or accessing anything else besides that app.
GUIDE TO DISABLE APPS ON IPHONE
Step 5: On the Guide Access screen, select Options to customize the iPhone app disabling options.
Volume Buttons: Disables the volume buttons.
Motion: Prevents swipe gestures on the screen.
Keyboards: Disable keyboard functionality.
Touch: Disable touch interactions and selections on the screen.
Time limit: Limit the usage time of the application.
Once you have finished setting up, press Done to finalize the options.
Step 7: Tap Start on the Guide Access screen to begin disabling, you need to set a password to turn on/off the Guide Access feature on the app.
Once you've started disabling the iPhone app using Guide Access, users will only be able to browse Facebook without being able to press the Home button or exit. To turn off Guide Access, simply re-access this mode on the app by triple-clicking the Home button then select End and enter the password to disable the disabling feature on that app.
Disabling iPhone apps with Guide Access is a very useful feature for those who lend their phones to others for web browsing, gaming, etc., just limit them to using a specific app only. Avoid installing, accessing other private information.
Currently, there are many counterfeit iPhone models on the market, before buying a used iPhone, you need to carefully check to avoid buying fake iPhones, one of the best ways to detect this is to check the iPhone's IMEI, just a few steps and you can determine whether the iPhone is genuine or not.