What's the use of the asterisk and pound keys on the mobile phone?

Without the asterisk and pound keys, there are only 10 keys in total. Arranging in two rows is too long, and it looks narrow and ugly. Arranging in three columns will have one more key, and then you will ask, why can't there be two more keys, but it must have an order? ...

Just kidding, then why are there these two keys in the phone keys? These two buttons are used to call the customer service for the next operation according to the voice prompt, and also for bank withdrawal. In addition, in Android phones, these two buttons also have many hidden functions:

First, open the dialing menu.

1.(*#06#) Check the IMEI number of the mobile phone, which is equivalent to the ID number of each of us. Only genuine mobile phones will have such a string of numbers, remember! Don't send this string of numbers to any stranger at will. 2.(*#0000#) View mobile phone status information, such as mobile phone model, system development date, whether the current system is updated, update date and status, etc. 3. (* # * # 2846579 # * #) After input, you can enter the background of the mobile phone, check the network information, and restore the factory settings with one click.

4. (* # * #121314 # * *) Test the function of the mobile phone. It is best to use this function when there is no one after class or after class, otherwise it may suddenly start to vibrate during class, and carry out all-round detection on the mobile phone, such as keys, vibration, receiver, speaker and so on. 5.(*#6776#) Inquiring about the factory date and version of the mobile phone is just like inquiring about the hospital where the baby was born and who the parents are. The above buttons may not be applicable to all brands of Android phones. At the same time, people who are unfamiliar with mobile phones must use them with caution, especially to restore the factory settings. If the mobile phone is not backed up or ready for recovery, it is best not to put it anywhere.

Almost every day, we open the dial box of our mobile phone and call our friends. Now we usually use smart phones, and the dial box is on the screen of the phone. If you are good at observing the dial, you will find that in addition to the ten numbers from 0 to 9, there are two special symbols in the dial, namely the asterisk key and the pound key, so what are the specific functions of these two keys? Today, let's talk about the asterisk key and pound key on the phone dial box.

Since Bell invented the telephone in 1876, there has been a design of dialing keyboard for mobile phones. In order to facilitate our normal dialing and beautiful arrangement, the mobile phone dialing keyboard adopts a rectangular layout of 3 times 4, with the number 0 in the middle of the bottom row, the asterisk key on the left and the pound key on the right. This layout has been used ever since.

Function 1: In the period of mobile phone popularization, the asterisk key can save a lot of phone bills. 1996 to 2000, mobile phones became popular. At that time, it was very expensive to make a phone call by mobile phone, especially for long-distance calls, and the phone bill could even reach about one minute 1.6 yuan, almost ten times the current phone bill. However, if you know the skills of saving telephone charges with the asterisk key, you will save half the cost every time you make a phone call. Specifically, when you make a long-distance call on your mobile phone, put an asterisk in front of the other party's mobile phone number, so that the cost of subsequent calls will be reduced by 50%, and friends who make long-distance calls will often do the same to save telephone bills.

Function 2: An alarm can be set on the fixed telephone through the combination of the asterisk key, pound key and numeric key. On a landline, you can set an alarm for the landline by combining the asterisk key, pound key and special number. The general setting method is as follows:

First, pick up the fixed telephone receiver. After hearing the dial tone beep, press "*55*" on the dial pad of the fixed telephone in turn, then the alarm time you want to set, then press the "*" key, then press the alarm number you set, and finally end with the "#" key. For example, if you want to set the alarm clock at 10 in the morning and the setting period is 10 days, you can pick up the fixed telephone receiver and hear the beep, and then enter "* 55 * 0810 */kloc-0 #" on the dial. If you want to cancel the alarm clock, please enter #55#.

Function 3: The mobile phone can be unlocked by a special combination of the physical key, the asterisk key or the pound key. In the past, many push-button mobile phones, computers for the elderly, etc. , you need to unlock it every time you open the screen. The unlocking method generally depends on the asterisk key and pound key on the physical keyboard. For example, many old people's computers are unlocked by pressing the asterisk key and the menu key. At the beginning, this function was different from the screen unlocking of smart phones now. At the beginning, the old mobile phone was unlocked mainly to prevent the mobile phone in the pocket from touching by mistake, which led to various misoperation of the mobile phone. Nowadays, the lock screen of smart phones is designed for the safety of mobile phones.

Function 4: The asterisk key and pound key can also be used to make non-manual customer service calls. When we make some customer service calls, the system often asks us to press the asterisk key and pound key. For example, when checking the telephone bill, we often hear the prompt "Please press * to return to the next floor, and press # to return to the next floor", and we often do the same.

Function 5: Different brands of mobile phones can also play some special roles through the special combination of numeric keys, asterisk keys and pound keys. 1, query the IMEI code of the mobile phone.

First, open the dial-up interface of the smart phone, and then enter "*#06#" in turn, and then the page will pop up the IMEI code of our mobile phone for our inquiry.

2. Query the status information of the mobile phone.

Most Android phones can enter "*#0000#" in the dial box to query various status information of the phone, including the specific model of the phone, the date of system update, the date of development and other detailed information.

3. Mobile phone open engineering mode.

Some mobile phones enter "*#*#4636#*#*" in the dialing interface of the mobile phone, and the engineering mode of the mobile phone will open. Through the engineering mode, you can see all kinds of mobile phone information, battery information, mobile phone usage statistics and so on.

4. Enter the mobile phone background.

Some mobile phones can enter the mobile phone background by typing "*#*#2846579#*#*" in the dialing interface, and can query the mobile phone network information and restore the factory settings.

5. Test the function of the mobile phone.

Some mobile phones can start testing various functions of the mobile phone, such as the receiver, speaker or keys, by typing "* #121314 # * *" in the dialing interface.

6. Check the corresponding version and factory date of the mobile phone.

Some mobile phones can enter "*#6776#" in the dial-up interface to inquire about the corresponding version information of the mobile phone and the specific factory date of the mobile phone.

7. Test the Bluetooth of the mobile phone.

Some mobile phones can start the Bluetooth function test by typing "*#805#" in the dialing interface.

8. Check the electronic security card of the mobile phone.

Some mobile phones can enter "*# 12345#" in the dial-up interface to inquire about the registration information of mobile phone electronic cards.

To sum up, the functions of the star key and the pound key on the mobile phone are still very powerful. In addition, the above eight special code combination skills may not be available on all mobile phones, so friends who are unfamiliar with this aspect must use them with caution.

Whether it's the physical buttons of a function machine or the touch-screen buttons of a smart phone, you will find two special symbols, one is "*" and the other is "#", except the digits of 10 from 0 to 9. These two symbols are located on the leftmost and rightmost sides of the dial. If we don't mention them specifically, it will really make people ignore their existence. So, what is the use of these two seemingly useless physical buttons or touch screen buttons?

When it comes to telephone design, it can be traced back to Bell. The accidental leakage of sulfuric acid accelerated Bell's development of telephone. The "*" and "#" signs existed when Bill designed the telephone. One way of saying it is for the sake of beauty. No matter how they are arranged, simple combinations of numbers are not pretty. After adding these two symbols, it can be arranged more neatly. One view is redundant design. Although these two symbols had no specific practical function at that time, they were understandable from the perspective of industrial design in order to leave room for the future.

Personally, I prefer the second one. Beauty is dispensable, and what looks beautiful now is just a continuation of usage habits. There is room for product design, which will bring convenience to future upgrades, especially industrial products.

"*" and "#" are different from specific numbers, which provides convenience for the special application of telephone in the future. Different functions can be realized through special combinations. Let's see what applications there are in the future!

Someone mentioned mobile phones. It is said that adding "*" before dialing the number can save long-distance charges. Suppose the charge before adding "*" is $ 1.50 per minute, and it will be reduced to 70 cents per minute after adding "*". Mobile phones are too old for me, and even then, I can't seem to afford them. But in my personal memory, adding "*" can really save long-distance charges. At that time, flip phones were very popular.

Now that we have entered the era of smart phones, what special functions have been developed by "*" and "#"?

The combination of special symbols can help us to query some services, such as *#06#, and we can query the serial number of the mobile phone, IMEI, which is what we often call USSD code. Of course, the function of USSD code is not limited to this, but also has more applications, including querying mobile phone information, starting services, WLAN, Bluetooth testing and so on. Interested people can query the USSD code and try to use it.

With the development of mobile Internet, smart phones are becoming more and more popular, almost everyone has one, and even many people use two mobile phones at the same time. If the mobile phone is suitable for frequent use, we will find that there are two more keys on the dialing keyboard, namely the * key and the # key, plus 0 to 9, which is the 12 keyboard. These keys appear when we dial, but we seldom use them. So, why does every smartphone or function machine have these two keys? What do they do?

This should start with the origin of the telephone. At that time, when designing telephone dialing keys, there were only 10 numeric keys from 0 to 9, but three-thirds had one more and three-quarters had two less, which was not arranged neatly. In order to achieve the purpose of neat arrangement, that is, the arrangement of 3*4, the engineer added two keyboards * and #, which were also prepared for the following functions and were really used.

For example, in the fixed-line era, it is estimated that many young people don't know. At that time, it was necessary to insert a calling card in the telephone booth, and the function of the # sign was to confirm that the calling card was inserted. Moreover, * and # can also play a lot of roles in setting the keyboard, such as checking the call record/dialing back/redialing, setting the alarm clock, etc. Of course, this is only in the era of fixed-line dialing.

In the era of functional machines, that is, the era of Nokia mobile phones, the * and # symbols also play a huge role. For example, debugging the input method requires the * key. These two keyboards also play a huge role when calling operators or bank customer service, such as entering a password to end with the # keyboard, or pressing the * key to return to the previous menu. Without these two keys, it is difficult to do a good job of telephone customer service.

In the era of mobile internet, although the physical keyboard is no longer used, the virtual dialing keys still exist, and there are still * and # keyboards. Moreover, these two keyboards have played a huge role and can be used for quick operation. For example, to check the IMEI of a mobile phone, just press *#06#. You can also query the specific information of the mobile phone according to some characters and enter the engineering mode. You can also format the mobile phone, or perform communication operations such as call forwarding. Many of them are hidden functions that need to be explored step by step.

However, with the development of mobile Internet/cloud computing/artificial intelligence, people use smart phones to dial less and less, which means that the opening rate of these two keyboards becomes less and less. Moreover, many functions can be controlled only by the voice assistant, and there is no need to input so many codes to query. The voice assistant can completely free his hands, and the asterisk key and pound key will quit the historical stage sooner or later.

Many things we encounter in our daily life are often ignored because of high frequency, just like the * key and # key in mobile phones. It's interesting to meet someone asking such a question today. Let's find out. The origin of * key and # key should start with the invention of telephone. As we all know, Bell invented the telephone. At that time, when designing the telephone dial, the numbers of 0~9 10 were put on the dial, which was irregular. Finally, they adopted a 3x4 arrangement, and the two missing seats were occupied by the * key and the # key. At the same time, considering that these two master keys will be attached in the future design.

The * key and # key have been used all the time: in the early fixed telephone, the alarm clock function was set by the combination of * key and # key with numeric keys; In the past, there were also public telephone booths, and the voice prompt operation played a turning and pause role by inserting the * key and the # key, which is also the most important role at present; Usually when we connect to 10086 voice service, we need the * key and the # key to complete the operation. And the most commonly used input *#06# to query the IEMI code of the mobile phone to identify the authenticity of the mobile phone. Although we don't use many of these uses, it's really hard to use without the * key and the # key. Of course, not only mobile phones, bank ATMs and ticket vending machines, but also many instruments with digital dials have * keys and # keys.

With the increasingly powerful functions of smart phones, when the physical keyboard is transferred to the screen of smart phones, the * key and the # key are not abandoned, but play more roles. The "master key" originally designed began to be truly universal.

See this question and say an interesting thing. I happened to be with my girlfriend at that time, and when I sent her back to the dormitory at night, my mobile phone suddenly shook. I opened it and took a look. At first glance, it was pushed by an APP in Guancun. Pushing messages is disgusting. Is there anything in it? I can't remember exactly what it is.

I didn't care at the time. I clicked on the notice of taking off the shelf and put my mobile phone in my pocket. When I sent her to the dormitory downstairs, I found that she gave me a lot of cold shoulder. I said, I'll go back first and turn around and leave me in the wind. I felt puzzled at that time, and so did monk Zhang. How did I make her angry?

With doubts, after I returned to the dormitory, I sent a message asking her what was wrong. She didn't say anything at first, but she was unhappy. I felt something was wrong and gradually became angry. What have I done? What is this?

It was not until we were about to quarrel that she vaguely said that she saw the night chat on my mobile phone ... I thought I was not serious and secretly played behind her back. I was cheated at that time and then I was speechless for a long time.

I said it was a push message from the APP. You didn't see the icon, so cut out the picture and send it to her. However, she said that she only saw the word "night chat". . .

I thought about it for a while, but I don't think so. I can't be misunderstood like this. I have to prove myself. So I said to her, wait a minute, I'll try to prove it to you.

After hanging up the phone, I quickly searched on major websites for how to find the push history of mobile apps. I looked for it for a long time, but I couldn't find it. I didn't find it.

After thinking and thinking, I finally thought of the skills of dialing the keyboard on the mobile phone I had seen before, so I came up with the following method.

Enter * # * # 4636 # * * on the mobile phone dial pad to view the usage statistics of the mobile phone application, and you will jump to a page with the usage statistics of the application. When you click on it, you will see very detailed information, including the name of the application, the last use time, the use time and so on.

So, things are solved happily. Sure enough, the next day, this app pushed the same message, and I decisively uninstalled it.

Now it is more convenient to check the usage of mobile phone applications. MIUI and EMUI have done this function separately.

Anyway, the * and # on mobile phones are generated for specific services. For example, when making international calls, the plus sign of the extension number was changed to * or #, and there were public telephones with IP cards. * and # have the function of pausing and changing characters.

At present, * and # are mainly arranged and combined by numbers, so that mobile phone manufacturers can customize various functions, which is convenient for developers to view mobile phone information or test mobile phone functions.

Come uninvited! Let me "have fun" to answer this question for you!

I think everyone should know that the asterisk key and pound key originated from the telephone invented by Bell. At that time, the asterisk key and pound key were added to telephone dialing.

In fact, when designing, the designer couldn't figure out what to do with it, just wanted to keep it for future development. It turned out that these two keys really played a great role. For example, in the eighties and nineties, when mobile phones were not so popular, most people used public telephones to make calls and needed IP cards. At this point, each operation step needs to use pound key to indicate pause or conversion.

Later, with the popularity of mobile phones, these two keys have more functions. For example, Nokia at that time, right? The function key+asterisk key was used to lock and unlock the screen.

Now, with the increasingly powerful functions of smart phones, when the physical keyboard is transferred to the screen of smart phones, the asterisk key and pound key play more roles.

Because of this, and now there are many mobile phone brands, the TIC-tac-toe and M-tac-toe keys on different mobile phones have different functions:

1, which is mostly used for auxiliary functions, such as checking the serial number of a mobile phone, pressing *#06*, and pressing *#7370* for a smart phone.

2. Generally, the tic-tac-toe key is a long press to switch the scene mode. As for the miter key, the general mobile phone just uses it to check the serial number of the mobile phone or just lock the keyboard.

3. Some miter keys and tic-tac-toe keys have special uses. Tick-tac-toe game can quickly adjust the silent mode or normal mode. In the calculator, tic-tac-toe key can press decimal point, and m-tac-toe key is used to select punctuation.

4. A small miter key is the screen lock key. When sending a text message, the pound key is the spelling switch key and the herringbone key is the punctuation key. Wait a minute.

From this point of view, the "master key" originally designed is really omnipotent.

Thank you for sharing what you like!

The largest one is used for auxiliary functions, such as pressing *#06* to check the serial number of the mobile phone, pressing *#7370* to make the smart phone soft, or other hidden functions of a specific mobile phone, and can also be used for advanced calls, such as checking the phone bill, pressing the numbers+* or # and so on.

Many people may be curious, the mobile phone number only consists of 0-9 digits, why should the # key and * key be designed on the dialing key? You don't need it when dialing, so what are these two keys for?

Actually, I don't want to know either After understanding it, I found that the * key and # key on the original mobile phone also hide many functions, which will make us feel completely enlightened. Let's have a look!

The landline era helps to set and cancel some functions:

I remember that when I first used the landline, I could set the alarm clock function. Operation is inseparable from the * and # keys.

For example, some are *55*, and you can set the alarm clock time according to the prompt. For example, if you get up at 7: 30 in the morning, you can press * 55 * 0730 #. The phone will ring at the set time.

If you want to cancel the alarm clock, you can also cancel it by adding some numbers and the combination of these two keys. Of course, the operation of each mobile phone may be different, and the buttons used are naturally different.

Besides the alarm clock function, there are other functions, such as checking the phone and dialing back. In these settings, you need to use the # key and the * key to complete.

"Pause" function in calling card:

In 2000, when smart phones were not so popular, it would be very popular to call family and friends with calling cards in public telephone booths. It is the kind of 20 1 card and IP card (exposure age), which should be familiar after 8090.

When using this kind of calling card, you will generally be prompted to press the "#" key to finish and continue to the next step.

It can be said that at this time, the # key and the * key on the mobile phone play the role of pausing or switching.

Transfer function when dialing at ordinary times:

Up to now, in the era of smart phones, in fact, the most direct function of the # key and the * key is to transfer.

For example, when we call some operators' customer service, bank customer service and other officials, we need to use these two keys to switch, confirm, end, and interval various businesses and inputs, or when we call the official company, we also need to use these two keys to go to the extension number and so on.

Special codes in the era of smart phones:

With the development of the times and the continuous progress of technology, many manufacturers have also designed these two buttons for some special codes, which is convenient for us to enter the system settings more quickly.

Or you can make some in-depth inquiries, settings and other operations on the mobile phone.

For example, different types of mobile phones mentioned at the beginning can quickly test the functions of mobile phones by inputting different codes;

For example, enter some specific codes (for example, most Android users enter * # * # 4636 # * *) to see what others have done with your mobile phone;

For another example, most Android phones can check the IEMI code of the phone by entering *#06#.

Nowadays, the functions of # key and * key are constantly improved with the constant changes of smart phones, and the more powerful functions of mobile phones are met through various combinations of manufacturers.

Besides these functions, what other functions do you know about the # key and the * key?

The origin of * key and # key should start with the invention of telephone. At that time, when designing the telephone dial, the numbers of 0~9 10 were put on the dial, which was irregular. Finally, a 3x4 arrangement is adopted, and the two missing seats are occupied by the * key and the # key. At the same time, it is also considered that these two master keys will add special functions in the future design, and then they are actually widely used.