Twitter can't send the confirmation code at this time.

There are other reasons why domestic mobile phones can't receive verification codes. Recently, Twitter has increased its restrictions. The area where your mobile phone is located is inconsistent with the area where your IP is located. In this case, you may not receive the verification code. Everyone knows that Twitter can't be accessed normally in China, which leads to the fact that the IP on Twitter is not a domestic IP, so many people will encounter the situation that domestic mobile phones can't receive the verification code.

Solution: Use Hong Kong IP. After testing, some Hong Kong IPs are OK. 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.