The mobile phone can't access the 4G network, and the short message can't be sent out.

1. According to the information you provided, if you mean that you can't use our 4G network, you can't rule it out because it doesn't meet the use conditions. At present, Unicom's 4G network can only be used if the following conditions are met:

1 The mobile terminal supports Unicom's 4G network;

2 The current location covers Unicom's 4G network;

3 use Unicom USIM card;

On the 4th, the 4G Internet access function was launched.

2. If your mobile phone can't send short messages, you can try to restart or change your mobile phone for testing to see if there are any of the following situations:

1 SMS center number is set incorrectly, please re-enter the correct SMS center number;

2 No signal or insufficient battery power;

3. Because the system is busy during the holiday short message sending peak period, it is suggested that you try again later or avoid the sending peak period;

4 The sending format is incorrect. If you send a short message to PHS users, you need to add the area code before the number;

5 SMS sending time exceeds 24 hours;

6. The mobile phone shields the short message sending function;

7 blacklisted by SMS;

The balance of number 8 is insufficient;

9 SMS Inbox and Outbox are full.

3. If this is not the case, please contact Unicom's manual customer service for details. The actual situation is subject to local policies.

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