Why is the Chinese mobile number 11? The Chinese mobile phone number in digital format can be divided into three sections: the first three digits are Internet identification numbers, 4-7 digits are telephone area codes, and 8-11 digits are customer numbers (randomly assigned). Therefore, the correct pronunciation of the 11 digit mobile phone number should be 1xx xxxx xxxx. It is said that two years ago, the mobile phone number was originally 10 tens of digits. Since then, the total number of mobile applications has increased significantly, and the number of 10 tens has been limited to 11 tens. According to the optimization algorithm of permutation and combination, there are 10 billion different data in China today! China's mobile phone number is the most