What does it mean to add 86 before the mobile phone number?

+86 is the international area code of China (in other words, a "+86" before the mobile phone number indicates that the mobile phone number is Chinese mainland).

Domestic mobile phone numbers are charged the same regardless of whether there is "+86" in front of them.

The international area code related to China is:

China +86

Taiwan Province Province, China +886

China Hongkong +852

China Macau +853

Extended data:

1. area code refers to the telephone area code commonly used in the administrative areas of major cities in the world. These numbers are mainly used for domestic and international long-distance telephone access.

2. Chinese mainland international area code 86, Beijing area code 0 10, Guangzhou area code 020, etc. When using domestic long distance calls, dial 0 before the area code.

3. Because 0 is the only long-distance access code in China, it is often used in parallel with the following area code, so it has become a habit. In fact, when calling back to a domestic city from abroad, the local international long-distance telephone access code is added after the China country number 86, and there is no 0 in front of the city area code.