My mobile phone is Samsung dual card dual standby. If both cards are installed, I can't send a message. If I remove a card, I can send a message. What happened?

According to your description, I suggest you try the following methods:

1. I suggest you go to Settings-Applications-All-SMS-Clear Data.

2. Restart the phone to see if there is a signal problem.

3. Check whether the number of the information center is correct: Information-Menu button in the lower left corner-Settings-Information Center.

4. Try to replace another sim card, or wipe the contact point between the mobile phone card and the mobile phone (whether the SIM card is in poor contact).

5. It is recommended that you try to upgrade the firmware. (Settings-About Equipment-System Update)

If you still can't send and receive SMS through the above methods, please bring the purchase invoice, maintenance card and machine to Samsung Service Center, and the engineer will check and handle the machine. Please click the following link to find out the specific location of Samsung Service Center:.

If you have any comments, suggestions and comments, please click: support.samsung.com.cn/survey.