Apple's mobile phone mirror can't receive the verification code

Take iPhone 1 1 as an example. Under the IOS 13.7 system: 1, first check whether the mobile phone is down, because the mobile phone will not receive the verification code, so if the mobile phone is in arrears, just pay the phone bill and re-apply for the verification code. 2. It may also be a problem with the mobile phone system that causes the mobile phone to fail to receive the verification code. In this case, it is recommended to shut down and restart or clear the mobile phone data and try again. 3. Or check the blacklist settings of the mobile phone. If the other party's number is on the blacklist, you won't receive the verification code. 4. Because the SMS storage capacity is limited, if the SMS storage is full, you can delete unimportant SMS and try again. Explanation of terms: iPhone is a series of smart phones developed by Apple in the United States, which is equipped with the iOS operating system developed by Apple. Originally this system was called iPhone OS. Because iPad, iPhone and iPod touch all use iPhone OS, it was announced at the 20 10WWDC conference that it was renamed as iOS(iOS is the registered trademark of Cisco's network equipment operating system in the United States, and Apple's renaming has been authorized by Cisco).