Dual-card mobile phone, telecom has SMS function. Why didn't Unicom?

Mobile terminals with dual cards and dual standby generally do not limit the SMS function of the main and auxiliary mobile phone cards.

If the Unicom mobile phone card used can't send and receive short messages, the following methods can be used for investigation:

1, you can change your mobile phone to see if you can send and receive short messages;

2. If you can send and receive short messages, it is recommended to re-insert the card into your mobile phone and send yourself a short message to see if you can receive it;

3. If not, it is recommended to check whether there is a problem with the sim card;

4. Check whether the number of the SMS center is set correctly;

5. Bring the mobile phone card to the local business hall for testing or replacement.