How to use the 4G self-service card replacement service to replace the 4G card? What are the precautions?

through the 4G self-service card replacement service, it is convenient to replace the 4G card by yourself without going through business acceptance. The specific steps can be divided into four steps: step 1-insert the special card for self-service card replacement into the 4G terminal, and insert the original 3G card into the 3G terminal; Step 2-Use the 4G terminal to edit the short message and send it to 1659157, with the content of "HK original 3G number", and initiate the self-service card replacement process; Step 3-Check the verification code of the short message received by 3G terminal and send the verification code to 1659157 using 4G terminal, and the content of the short message is "YZ verification code"; Step 4-Restart the 4G terminal. The original 3G card is deactivated and the 4G card is enabled. (Note: 1. There is no need to add double quotation marks, the letters are capitalized, and there is a space between the word code and the number or verification code; 2. Users who are in arrears, have downtime, are connected to the mobile phone, and have handled the business of mutual exclusion with card replacement cannot change their cards by 4G self-service. For more service offers, click on the "official website" customer service 219 below to answer your questions.