Sina mailbox can't receive Twitter verification code.

Using Hong Kong IP, some Hong Kong IPs can be tested. Don't use free IP cable, it is better to use native IP. The abused IP has long been blacklisted by Twitter officials, so it cannot be used.

Solution ②:

Buy a Twitter account from the website, and the website provides various types of Twitter accounts (email accounts are bound to mobile phones, email accounts are not bound to mobile phones, and email accounts are bound to mobile phones to open dual authentication accounts); Most of the purchased accounts can be bound to domestic mobile phones, but a few mobile phones still can't. The reasons for it were not known Special reminder is that the mobile phone must be replaced in the normal state of the account, otherwise the mobile phone must be verified before it can be replaced.

Solution ③:

Buy a Google GV phone number and receive Twitter verification code. After testing, most GV mobile phone numbers can receive Twitter verification code.

Some IP with problems in this method may not receive verification code, so it is recommended to use clean American IP when using GV mobile phone number.

When binding, you are prompted that the mobile phone number is unavailable, or you can try to use the above solution.

As for the prompt that the mobile phone number has been used when binding, this situation can only be changed. Twitter stipulates that a mobile phone number can be bound to at most two accounts, and sometimes it is not allowed to bind only one.