The update is complete

[hampeh]

Dear teachers and friends,


I would like to know if the sentences below are ok or not.

1. I’ll let you know once the update is complete.
2. I’ll let you know after the update is complete.
3. I’ll let you know once the update has completed successfully.
4. I’ll let you know once the update has been completed successfully.

Thanks in advance.

[JohnParis]

They sound OK to me .