What are the hidden functions of mobile phones?

1, invisible backup battery, mobile phone battery is insufficient. To keep it in use, press the *3370# key and then press the dial key, and the phone will restart. After starting, you will find that the battery has increased by 50%. When this hidden spare battery runs out, it must be recharged. When charging, the invisible backup battery is also charged at the same time, and this method can be used again next time the power is low. If the battery of the mobile phone is low, it is very useful to know this in an emergency.

The mobile phone has been stolen, and there are ways to prevent thieves from using it. To view the serial number of the mobile phone, just enter * # 0 6 # and the serial number of 15 will appear on the screen of the mobile phone. Every mobile phone in the world has a unique serial number. Write down this serial number and keep it well. One day, if the mobile phone is unfortunately stolen, call the mobile phone provider and provide the serial number of the mobile phone, and they will block the mobile phone, so that even if the thief changes the SIM card, it still cannot be used, which becomes useless to the thief. If every mobile phone holder in the world does this, there is no point in stealing mobile phones.

3. Don't use a full battery when there is only one battery left. Compared with the left side of the cell, the transmission intensity is more than 1000 times.

4. In the standby screen (when the music player or radio is turned on), press and hold the on-hook key to turn off the music player or radio.

5. In the standby screen, press and hold the right soft key (you can also press and hold the answer/end key on the headset when connecting it) to start speech recognition.

6. On the standby screen, press and hold the * key to connect to the Nokia homepage, press and hold the 0 key to connect to the homepage, and press and hold the # key to switch between the number 1 and the number 2.

7. In the standby screen, press and hold the 1 key to enter the voice mail, and press and hold the 2-9 key to speed dial.

8. After entering the menu, when ... is displayed in the upper right corner, you can press the number keys to quickly enter the menu, for example, press 1 to enter information, and press 2 to enter the address book.

9. When entering the folder, press the left arrow key to enter the next menu, and press the right arrow key to return to the previous menu.

10. In Materials, press and hold the # key to view the list of this folder or file.

1 1. When viewing multimedia files (such as pictures or music, which can be sent by MMS), press the dial key to enter the MMS sending interface.

12. Press and hold the # key to mute the video.

13. When taking photos or videos, you can use the volume adjustment button to zoom.

14, displaying serial number and imei code. If you want to buy a genuine mobile phone, you must learn various methods to check the mobile phone, and the method of checking the serial number and imei code is one of the commonly used methods. So how do we display and read these identification codes? Actually, the operation is very simple. You just need to directly input the key combination of "*#92702689#" into the mobile phone, and then the mobile phone will pop up several screens to display information, in which the folding top shows the factory time of the mobile phone, the second screen shows the serial number and imei code of the mobile phone, the third screen shows the purchase time of the mobile phone, and this information can be changed once, and the fourth screen shows the last maintenance time.

15. Make full use of key combinations. There are many key combinations in the mobile phone that can achieve many functions. If we can make full use of these function keys in the process of using the mobile phone, the efficiency of using the mobile phone will be greatly improved. Here are a few examples: use the "*77#@" key combination to allow caller ID; Use the "#43#@" key combination to turn off the call waiting function; Use the key combination of "**03*330*" to modify the network restriction or password ban; With the key combination of "#3 1# opposite number @", you can dial the other party's phone and disable the display function. As we all know, when using a mobile phone, it will consume the battery power of the mobile phone. On the premise of a certain amount of electricity, how to improve the standby time and talk time of mobile phones has become a topic of great concern to everyone. Here, from the perspective of operation, the author provides you with a small skill to save battery power. When we don't use Nokia mobile phone for the time being, we can input a series of numbers like "*#746025625" to realize the function of turning off the clock in the sim card, thus saving more power on the battery. After practical testing, it is found that using this technology can save 20%~30% of battery power.

16. Make good use of voice dialing function: supporting voice dialing is a more practical function in new mobile phones at present. For example, when using the Nokia 33 10 mobile phone, you can make full use of the voice dialing function to improve the dialing speed. The so-called voice dialing means that the dialer can dial the telephone number by saying one or more words related to the telephone directory, for example, the name of the owner of the telephone number. Before using voice-activated dialing, you must record voice-activated tags, which means recording voice-activated tags for 8 numbers in the phone book. The specific operation steps of recording voice-activated tags are as follows: first, select the "Add Voice-activated tag" button in the mobile phone panel, then select the required name and phone number in the pop-up interface, then press "(-)" with the mobile phone, and then put the mobile phone close to your ear. If you want to record, it means that you have finished voice-activated recording. When using voice function to dial a number, just set the phone to standby state, then press "(-)" for a long time, put the phone in a normal position near the ear, and clearly state the voice tag to be dialed, and the phone will play the voice tag and make relevant calls. If no matching tag is found or recognized, please press "(-)" to repeat it, or press the C key to return. When using this function, we must also pay attention to that the voice-activated tag has nothing to do with language, but depends on human voice; In addition, try to use the voice-activated dialing function in a noise-free environment, because voice-activated tags are very sensitive to noise.