What is the function of the mobile phone key, and what is the use of the and key on the mobile phone

*"Generally the pause button, most of the basic pulse buttons ** machines are attached to this kind of "*" button. When the user makes an external call, if it cannot be connected, use the "*" key, and wait until the dial tone (secondary dial tone) of the public network is heard and then released, so that the automatic switch of the public network can operate correctly. If you only use the " " resend key according to the above method instead of pressing the "*" key to pause, in case the dial tone of the public network switch comes slowly, an incorrect action will occur.

** " " " key on the machine.

On the old Pulse Machine, the key was used to redial the previous number. When you hear a busy tone due to a pause, put on the microphone and take it off, after hearing the dial tone, press the " " button, you can automatically send the ** number that was pressed last time again, if you still can't get through, you can press it many times. It should be noted that this kind of machine may only be seen in museums and collectors.

However, with the upgrading of the machine, the key of the dual audio machine that is now commonly used has been given a new purpose, because the dual audio machine has a dedicated "redial" key. **There is one more on board"*"Key, when you use the first machine to call the user or the answering party of the automatic pager is a computer operator, and the key plays the role of interval, conversion, confirmation, end dialing and so on according to the requirements of the other party when dialing, in addition, and the key is also used for program control ** new business, such as the registration and cancellation operation when handling the service items such as busy memory, transfer call, reduced dialing, etc.

In the ** machine produced by different manufacturers, some special functions may also be arranged for the key, such as the long press key in the Siemens mobile phone to operate the keypad lock, etc., please refer to the manual of the ** machine.

Press and hold the button in standby and it will turn into P*, and then there is the button used to return to the menu when you call some help desk**.

In standby mode, long press is muted.

Press * and then right button to lock the keyboard.

In the SMS state, long press is to change the input method.

Press * to be the symbol and long press to switch between pinyin and strokes.

It's useful, at least you can press *

: Inquire about ID cards.

Every mobile phone on the market will have an IMEI**, which can prove that your phone is real or fake or whether it is repaired, there are fewer fakes, but there are still a lot of repaired goods, and if one day your phone can't be found, mobile operators can also track the location of the phone through IMEI. The operator mainly uses this code to record your mobile phone dialing**, sending SMS to the Internet, and the pollen that needs to be queried only needs to be entered in the dialing interface *, and you can know the ID card of the mobile phone.

Test the functional integrity of your phone.

There is also a hidden engineering menu under the dial key, which can be convenient for you to test the mobile phone network information, battery temperature, sensor, camera problems, if you feel that the mobile phone has a similar problem, you can try to test it, find the right problem to repair and are not afraid of being charged indiscriminately, just enter * *, test it!

View your phone usage history.

I believe that many times, colleagues and friends borrow a mobile phone, or a girlfriend checks the post, if you are curious to know what they have seen, you can enter * * in the mobile phone dialing interface, and then the usage statistics will appear, clear. Don't tell anyone.

This is because mobile phones have become an indispensable part of our lives. But because of the popularity of chat software now, few people will call ** directly, so have you noticed the and* on the mobile phone dial keypad? What do they do?