This is a hidden mobile phone feature, very useful\February 15, 2012, 13:08\1. When you don't want to be disturbed by others, but don't want to turn off your phone, here's a way to make your number appear as unavailable. Enter *21*13800000000# and press the call button. When someone calls your number, it will show as unavailable. Enter #21# and press the call button again to return to normal.\2. Identify the quality of your phone. First, press *#06#, then a serial number will appear on your phone. Count the 7th and 8th digits. If these two digits correspond to the following, you can determine the quality of your phone.\0,2 or 2,0 - a very poor phone\0,8 or 8,0 - a slightly better phone\0,1 or 1,0 - a very good phone\0,0 - produced by the original manufacturer, the highest quality (original phone)\1,3 - produced in Azerbaijan, a very very poor phone\3. Invisible backup battery. If your phone's battery is low and you want to continue using it, press *3370#. The phone will restart, and after restarting, you will find that the battery has increased by 50%. After this hidden backup charge is used, you must charge the phone. When recharging, the hidden backup battery will also recharge, and the next time the battery is low, you can use this method again. This is very useful in emergencies when the phone battery is low.\4. Did you leave the car remote in the car? Can your car remote unlock the car? If yes, and one day you leave the remote in the car while the spare remote is at home, you'll find a phone very handy. Use your phone to call someone at home, hold your phone about one foot from the car door, while the person at home presses the unlock button on the spare remote near their phone, your car door can be opened. This method works no matter how far you drive from home.\5. Emergency situations. The universal emergency number all mobile phones can dial is 112. If you find yourself in an area with no mobile coverage and encounter an emergency, using your phone to dial 112 will work, because your phone will automatically search all available networks and make an emergency call.What's particularly interesting is that even if your phone's keyboard is locked, you can still dial 112. Give it a try!\4. What if your phone is stolen?\There's a way to make it unusable for the thief, hehe! Check the serial number of your phone by simply typing *#06#. A 15-digit serial number will appear on the phone screen. Every phone in the world has a unique serial number, so record it and keep it safe. If one day your phone is unfortunately stolen, call your service provider and provide your phone's serial number. They will help you block your phone, so even if the thief inserts a new SIM card, it still won't work. Your phone will become useless to the thief. If every phone owner in the world did this, stealing phones would be pointless. In Australia, the police even have a database of stolen phones, and if your phone is found, it can be returned to you.\Everyday maintenance essentials:\1. Don't wait until your phone battery is completely drained to charge it.\We generally have the idea that it's better to fully drain the battery before charging. This used to be mostly correct because older rechargeable batteries were nickel-hydrogen (NiH) and these batteries had a so-called memory effect. Not fully discharging them before charging would rapidly reduce battery life, which is why we used to charge them only after complete discharge. But nowadays, most phones and general IA products use lithium (Li) batteries, which do not have a memory effect. Waiting until the battery is completely drained to charge it can actually reduce life because the chemical reactions inside the lithium battery may be incomplete. The best method is to charge it at any time, keeping it fully charged whenever possible, which helps your battery last longer and remain more reliable. This information comes from manufacturers and has been personally tested.\2. Do not answer calls while the phone is charging!\This is because answering a call while the phone is charging may pose potential danger.\3. Do not use your phone when the signal is down to one bar\Compared to full signal, when only one bar remains, the transmission strength can differ by more than 1000 times. So... people who frequently use their phones... take note... ^0^\4. 12593 phone number = trap\Are you storing your out-of-town friends' numbers in the 17951 phone number format in your contacts, instead of dialing them individually?Then the charge will change from 0.39 yuan per minute to 1.3 yuan per minute. I also checked with 10086, and their explanation was that if it is stored in the phone number book, the system will not recognize it. Therefore, you cannot get the discounted rate and must dial 12xxx directly on the keyboard each time. For Shenzhouxing users, the same applies to M-Zone and Global System users. If you are a China Mobile user, once you know the following traps China Mobile has set for you, you will no longer be surprised at why your phone bill seems to fly away like it has wings. Using the 12593 number allows discounts, but if you save the '12593 number' in the phonebook in advance, then recall it to make a call, China Mobile will not recognize that you are using the 12593 discounted dialing method and will charge you as a regular call. If you are roaming, the two billing methods can differ by up to seven times! When I learned about this billing method, I really didn't know how to express my anger. Later, when I called 10086 for consultation, if I hadn't proactively asked about this issue, the staff member with ID 6608 would not have told me about this billing method.
5. Parasites on mobile phone bills
Mobile phones inexplicably subscribe to useless messages. I strongly suggest everyone check whether they have been affected. The simplest way is to unsubscribe from the parasites that steal your mobile phone fee every month! China Mobile was forced to launch a new service on March 15. If you are a China Mobile user, type '0000' and send the message to 10086. Within seconds, you will automatically receive a list via SMS showing what SMS services are subscribed on your phone and which providers are deducting your phone fee every month, either overtly or covertly. Type '00000' and send it to 186201 to unsubscribe from all SMS services.
6. Don't rush to end a call exactly at 1 minute
When we make calls, we often try to end exactly before 1:00 and feel relieved, but that is not the case. According to a China Mobile staff member, when your call reaches 0:55, it is already counted as one minute. So the call time from 0:55 to 1:00 is actually charged as 2 minutes.
7. If your phone gets wet, do not press any buttons, especially to turn it off (pressing any button will immediately allow water to flow along the circuit board). The correct method is to immediately open the back cover, remove the battery directly, and force a power cut to protect the mainboard from water damage.8. How to Revive a Dead Phone Battery
Next time you encounter this situation, save your money and try this very effective method:
1) Wrap the battery in newspaper, then put it into a plastic bag, seal it well, and place it in the freezer for three days (the newspaper can absorb excess moisture).
2) After three days, take it out and leave it at room temperature for two days.
3) After two days, charge the battery fully, then put it back into the phone and test it (it is estimated that 80%-90% of batteries can be restored).
9. Give Your Phone a CPR!
Does your phone frequently power off? Or does it run out of battery shortly after charging fully?
Don't worry, it's just a temporary “heart stoppage,” and you can revive it with just an eraser!
Remove the battery and use an eraser to clean the battery contacts (copper contacts).
10. How to Remove Scratches from Your Phone Screen
Here's a useful tip to share...
Squeeze a small amount of toothpaste onto a damp cloth, then rub it back and forth on the scratched area of your phone screen, covering all directions and applying some pressure...
You will find that the scratches on your phone screen disappear... isn't that amazing?! After wiping it clean with a dry cloth or tissue, your phone screen will even become brighter.
