I can't send the text message, but it keeps showing that the text message is delayed. What should I do?

If there is a delay in sending and receiving SMS or MMS, it is suggested that:

1. If you try to change other geographical locations, the signal strength may be weak.

2. Take out the SIM card and insert it again; Or try to change another SIM card.

3. Try again after upgrading your phone.

4. If it is invalid, please back up the information (contacts, text messages, pictures, etc.). ) and restore the factory settings.

If the problem still exists, it is recommended to take the purchase invoice, maintenance card and machine to the local after-sales service center for testing by professional engineers.