Will pi's mobile phone verification code always fail?

Solution:

Ensure that the mobile phone number is correct when registering (someone entered the wrong mobile phone number when registering and failed. After all the following numbers fail to authenticate, you can log out and log back in to your account to check whether there is this error)

(2) Whether the mobile phone number has opened international business, because the SMS sent is an international SMS (generally, the mobile phone number has been opened, and if it has not been opened, it needs to be opened on the corresponding operator APP).

(3) Whether there is a phone bill balance in the mobile phone account (some people failed to send it many times because of the arrears of the mobile phone, and it was finally found that it was due to the arrears), because it usually takes a few cents to send it successfully.

In addition, please note that the following numbers containing+or//+cannot be deleted. If one number is not authenticated after 20 seconds of sending, replace it with another number, and do not send it repeatedly.