Cool 7295+3g Unicom card can't send or receive SMS. What's the matter?

There are the following reasons for not receiving the SMS or verification code: 1. You can check whether the mailbox is full first, and if so, please delete some information; 2. If you still can't receive it after deleting it, you can change the machine or card to see if it is a hardware factor. 3. After eliminating the above reasons, you can try to test whether it can be received in other places to see if it is the reason for the weak local signal. If the above problems do not exist, please contact the local manual customer service to deal with this problem. If your mobile phone can't send short messages, you can try to restart or change your mobile phone for testing, and check whether there are the following situations: 1. The number of the short message center is set incorrectly, please re-enter the correct number of the short message center; 2. There is no signal or the battery of the mobile phone is low; 3. The system is busy due to the peak period of holiday SMS sending, so it is suggested that you try again later or avoid the peak period of sending; 4. The sending format is incorrect. If you send SMS to PHS users, you need to add the area code before the number; 5. The short message sending time exceeds 24 hours; 6. The mobile phone shields the short message sending function; 7. Being blacklisted by SMS; 8. The number balance is insufficient; 9. SMS inbox and outbox are full. If the above reasons cannot be solved, you can contact the local manual customer service or go to the business hall to confirm whether the SMS function is enabled and hand it over to the staff for handling.