Why did it take so long to receive the text message, especially the verification code?

It takes a long time to receive short messages, especially verification codes. Reason: 1, which is related to the strong signal and fast processing speed of network operators.

2. The mobile phone is equipped with interception software.

3. The mobile phone is turned off, and there is no signal for the time being.

4. The user has set a blacklist on the operator side.

Mobile phones can't receive short messages of more than 70 words.

5. The SMS storage is full.

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Can prevent malicious verification code:

Malicious password cracking, ticket brushing and forum flooding can effectively prevent hackers from constantly trying to log in to specific registered users by using specific program violent cracking methods. In fact, verification code is a popular way for many websites (such as online personal banking of China Merchants Bank and Baidu Community), and we have also realized this function in a relatively simple way.