Usually call waiting

Mobile phones are mobile terminals and are mobile phones that can be held in the hand. In the early days, it was commonly known as Big Brother because of its larger size. Now it has developed into the 5G era. In April 1973, American engineering technician "Martin Cooper" invented the world's first mobile phone for civilian use.

The sudden appearance of music during a mobile phone call is usually a sign of call waiting, that is, when two parties are talking, the other party hears system prompts or music. Call waiting means that when the mobile phone user is on a call, another call is sent to the user. At this time, the party initiating the new call is put on hold, and the new call will be connected after the original call ends.

Bad habits of mobile phone use bury "time bombs"

1. Use free WiFi at will

Although it is easy to connect to WiFi, it is even easier to lose money, so be careful when connecting. Criminals often set up free WiFi in public places to lure you in and steal important information, such as mobile payment usernames and passwords. Therefore, friends, it is better not to use free WiFi when using mobile phones to pay.

2. Use browsers to shop

Browsers have always been a breeding ground for viruses and phishing websites. It is easy to be "phished" when shopping online using a mobile browser, and the payment protection process is blocked. Simplification, if you are not careful, you will suffer heavy losses. Remember to use the official APP to pay for purchases, which is safer.

3. Applications are not completely exited

Apps on mobile phones like to stay in the background. Every time you think you have closed the program, in fact it is still running in the background. Anyone who touches your phone will Anyone can see it from the background management, and can skip verification and enter the application directly. If banking or other sensitive applications are not completely exited, it will be a disaster if the phone is lost.

4. No screen saver password

Many friends do not set a screen saver password, which is not only convenient for themselves to use, but what is even more frightening is that it is also convenient for others who pick up your phone. All can be seen at a glance.

5. Bluetooth is turned on for a long time

The Bluetooth of smartphones can also spread viruses. Through Bluetooth spy software, others can view your phone book, information, files, modify your phone settings, dial for you, etc. So when you are not using the Bluetooth function, be sure to turn it off.