Samsung note 3 mobile phone suddenly can't send short messages, and it fails to send them every time. There is also an exclamation point, please help God.

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. Only GSM mobile phones can modify the information center number, CDMA mobile phones do not support it. The number of centers in different operators and regions is different. Please contact the network operator for confirmation. The number of the information center must be preceded by "+".

4. Try to replace another SIM card.

5. It is recommended that you try to upgrade the firmware. (Settings-General-About Devices-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:.

Welcome to Samsung service to make an appointment:

. Samsung . com/support