How to retrieve deleted messages? Oppo has no backup.

I'm sorry to hear the news. Don't worry, you can try the following methods:

1. If you turned on the cloud backup function before deleting the notifications/messages in the Info APP of your mobile phone, please click the usage method of cloud backup and recovery data to try to recover the deleted notifications/messages.

2. If you don't turn on the cloud backup function before deleting the notifications/messages in the Info application, the deleted notifications/messages will not be retrieved.

Tips:

In order to avoid the inconvenience caused by data loss, it is recommended that you back up important data on your mobile phone regularly.