Why doesn't the pop-up send a text message?

The mobile phone is not equipped with a mobile phone card, the mobile phone number is in arrears, and there is no signal. The mobile phone card is damaged.

2.

Whether security software is installed in the mobile phone or not, the blacklist setting of security software will intercept such short messages. We can check whether the short message with verification code 12345 is blocked.

3.

If we submit an application for SMS verification code through the website, but the security level of our browser is relatively high or "third party 12345 and website data" is blocked, the request for SMS verification code may not reach the other party's background, so we need to reset the security level of the browser or turn off the setting of "block third party 12345" in the browser.