Sending text messages on my mobile phone always shows that it has not been delivered, no matter who I send it to, what should I do?

If your mobile phone cannot send text messages, it is recommended that you check whether you can make and receive calls. If not, please check whether the signal of the machine is stable and whether the phone bill is sufficient.

If the mobile phone can receive and receive calls normally, but cannot send text messages, it is recommended:

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

2. Try changing other SIM cards.

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

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

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