Hello, Jin Li. What is the situation that message w909 cannot be deleted?

1. Confirm whether to back up the SMS to the cloud, and investigate the reasons for restoring SMS in the cloud after deleting SMS;

2. Confirm whether the SMS is backed up to the SIM card, and check whether the SIM card of the mobile phone backs up the SMS;

3. Confirm whether this phenomenon occurs in individual text messages. If so, please delete individual contacts and add them to the action again. If not, check whether there are two points 1 and 2, and then press 4 and 5 to operate.

4. It is suggested to clear the data of SMS, and go to Settings → Advanced Settings → Application Management → All → Find SMS, and clear the data and cache;

5. If the problem cannot be solved after the above operations, you need to back up the data, and choose to restore the factory settings before observing. If the fault still exists, it is recommended to send the mobile phone to the local after-sales inspection with the purchase invoice and warranty card.