<human>:  How can I see when someone was last online on facebook?
<bot>: Know when Someone Was Last Online on Facebook on Android
1. Open Facebook.
2. Tap the Messenger icon in the upper-right corner.
3.. Tap the Search bar at the top of the screen.
4. Enter the name of the person you want to check on.
5. Tap the person's name to open a new chat.
6. View when they were last active below their name at the top.