Why did the time pass before the verification code was written?

The verification code has passed before it is completed, which may be due to the following reasons:

1. network delay: when entering the verification code, the network delay may delay the submission time of the verification code, resulting in the expiration of the verification code.

2. Incorrect mobile phone time: Some mobile phones may be inaccurate, or the verification code may expire.

3. The short message receiving time is too long: If the short message receiving time is too long and exceeds the effective time of the verification code, then the verification code will also expire.