Samsung s7 edge was just able to send short messages, but suddenly it failed to send them. What's the matter?

if the mobile phone can't send short messages, I suggest you check whether you can receive and make calls. If not, please check whether the machine signal is stable and whether the phone bill is sufficient.

if the mobile phone can receive and call normally, but can't send short messages, suggestions are as follows:

1. Check whether the information center number is correct (please contact the local network operator for the information center number, and the telecom card has no information center number setting)

2. Try to replace another SIM card.

3. Check whether the machine has a firmware/system update push notification. If so, please upgrade the mobile phone to the latest version.

4. if it doesn't work, please back up the data (contacts, multimedia files, etc.) in the mobile phone and restore the machine to factory settings.

if the problem still exists after the above operation, please bring the purchase invoice, repair card and machine to Samsung service center for inspection.