What mobile phone functions are actually very useful, but many people are useless?

As the name implies, it is a function that is only used during flight. In order to ensure flight safety, this mode is available. In fact, flight mode has other uses:

The cell phone suddenly lost its signal.

Turn on the flight mode at this time and turn it off later. This process is equivalent to restarting the phone, helping you check the network and regain the network connection. This is very practical!

The cellphone will be out of power soon

Most of the power of the mobile phone is consumed in the signal. Turn on the flight mode, and the power can be saved by more than half! 10% power can last for an hour or two!

The second one: the camera

The camera can be used as an infrared detector in addition to its own photographing function.

Infrared rays invisible to the naked eye can be detected by the camera of the mobile phone! Turn on the camera function and aim the camera of the mobile phone at the infrared remote control of the air conditioner or TV. When you press the remote control, you can see purple light through the screen of the mobile phone, and you can check whether the remote control has electricity.

Third: mobile phone power saving mode

In order to keep the power of the mobile phone, try to use it when it is not used often.

Turn off WiFi function, Bluetooth function of mobile phone and GPS function; Reduce the brightness of the screen and turn on the power saving mode; Turn off App notifications that are not commonly used; Clear the application cache; Exit the App correctly. Sometimes, after using the App, we will directly press the back or Home button. In fact, this operation did not completely close the program, but switched to the background of the mobile phone. Residual processes will not only occupy our valuable memory, but also continue to cache data, so you need to manually exit the App. Users are advised to get into the habit of manually closing the sliding taskbar, or "Settings >"; The "Apply" operation ends.

Reprinted to-in fact, you don't know your mobile phone because you haven't used some functions.