What is the reason why whatsapp can't send verification SMS?

Whatsapp cannot send verification SMS Reason:

1: Interception software is installed on the mobile phone, and the verification code cannot be received. I suggest you unseal the SMS of the application software or try to change your mobile phone.

2. The mobile phone is turned off, and there is no signal for the time being. Due to arrears or shutdown, the verification code and SMS cannot be received. It is recommended that you stop working due to arrears, and take it back 24 hours after payment, basically within 24 hours. I suggest you change your mobile phone number or pick it up the next day.

3. If you use your mobile phone abroad, or if you can't receive the SMS verification code by using your mobile phone abroad, it is recommended that you get it as soon as possible in the case of signal network delay.

4: The SMS is full, and the SMS verification code cannot be received. It is recommended to clear the message and try again.

5. Some areas have mobile phone network fault lights, and the verification code cannot be received. Port 10085 may be closed. Suggestions can be sent to111to 10085 to open it.

If you can't complete the verification, try the following methods:

Reboot (shut down, wait 30 seconds, and then power on).

Remove and reinstall the latest version of WhatsApp.

Enter the full phone number you use in WhatsApp on any mobile phone, including the country code, to send a test message to your own phone number.