1, port number transfer is not only beneficial to consumers, but also to optimize the market structure. Through market control measures, effective competition can be achieved and consumer welfare can be improved.

2. For consumers, port number transfer can reduce the transfer cost of users. For a country, number portability can save number resources.

3. Number portability can break the dominant position of existing telecom operators, thus promoting market competition and optimizing market structure.

4. After the implementation of port number transfer, the number resources are usually managed centrally by the third party, which also saves social resources.

Disadvantages of port number transfer:

First, because the signal coverage area of operators is different, the signal after network transfer may be different from that of the original operators;

Second, in the process of network transfer, the mobile phone number can not be used normally;

Third, after changing operators, SMS channels will change, and it is very likely that SMS messages such as bank cards, WeChat and Alipay will not be received.

Port number forwarding is not supported:

As of 20 19, 1 10, 17, the following numbers do not support port number transfer at this stage:

1, satellite mobile service number: network number 1349, 174, etc.

2. Mobile communication resale number: the network numbers are 170, 17 1, 162, 165, 167, etc.

3. Internet of Things number: Internet of Things private network number (such as 146, 148, 149, 140- 144, 1064, etc.). ) and other common public mobile communication network numbers for Internet of Things applications;

4 other circumstances that do not meet the requirements of national policies.