Why is there no SMS in Xiaomi's mobile phone SMS recycle bin?

Short message storage time setting, unable to open the cloud synchronization function and other reasons.

1, SMS save time is too short: in Xiaomi mobile phone, you can set the save time of SMS. Set the save time to be short, and only keep the messages in the last few days or hours. Old information will be automatically deleted and cannot be found in the recycle bin.

2. Cloud synchronization function is not enabled: millet cloud service is used to synchronize mobile phone related data (including address book, memo and calendar). ) has been enabled. When one or more pieces of information in the local storage are deleted, corresponding operations will be performed in the cloud to keep the data synchronized. After deleting the local storage, the corresponding content in the cloud will also be deleted.