Why does the OPPO R7 phone often fail to receive text messages and some verification codes?

It may be caused by the following situations:

1. The verification code cannot be received if the interception software is installed on the mobile phone. It is recommended that you unblock the text message interception of the application software, or try to change the mobile phone.

2. If your mobile phone is turned off, has no signal, is in arrears, or is down, and you cannot receive verification codes and text messages, it is recommended that you stop the phone in arrears. It will usually be restored within 24 hours after payment, basically within 24 hours. It is recommended that you change your mobile phone number or obtain it again the next day.

3. If the mobile phone is used overseas or the SMS verification code cannot be received when using an overseas mobile phone, it is recommended that you try to obtain it again later if the signal network is delayed.

4. The SMS verification code is not received when the SMS storage of the mobile phone is full. It is recommended that you turn your phone on and off to try.

5. In some areas, if there is a mobile phone network failure and the SMS verification code cannot be received, it may be that port 10085 is closed. It is recommended that you send 11111 to 10085 to open it.