Hope Everything is going cool in your life.
so i am here to present you a small idea that how can we hide last seen online status to others on whatsapp. to do so follow the steps below
1. First of all, you need to Open whatsapp app in your iPhone.
Go to whatsapp Settings.
Now go Chat Settings > Advanced > Last Seen Timestamp Off
Now this feature take 24 hours to effect, also take 24 hours to toogle it back. After that no one trace your last seen time. If you are online that it appear as Online.
Now if want to hide Online Status, follow simple steps
When you open whatsapp your online time is saved by app, and it appears your whatsapp profile to your friends or other user account, So basically you need to do following,
-> First you want to Disable your Data or any other internet connaction
-> Now Open whatsapp app and read message.
-> Now Exit whasapp app completely
-> Enable your Data or any other internet connection.
Now your Last Seen will never update to others, Enjoy