What is the final SMS verification error?

Generally speaking, the correct format of verification code SMS is: signature+SMS text or SMS text signature. SMS cannot be sent without signature verification.

Correct example: Dear user, your registration verification code is: 1589, which is valid within 3 minutes.

Error example: Dear user, your registration verification code is: 1589, which is valid within 3 minutes.

Second, the Chinese and English symbols in the group

You must use Chinese format, not English [], and the channel does not support [] as a signature symbol.

Correct example: Dear user, your registration verification code is: 6356, 10 minutes.

Error example: Dear user, your registration verification code is: 6356, 10 minutes.

Third, the SMS signature should be correct.

In principle, SMS signature requires 3-8 characters in Chinese, involving business license, company name, keywords or related business. For example, if the bank verification code is replaced by an irrelevant supermarket signature, it will not be sent out.

That's about it, for your reference.