Follow these steps if you don’t know how to unread a message on ig in airplane mode:-
1. First open your smartphone’s Quick settings or control center.
2. Then tap on the airplane icon to activate the airplane mode.
3. Now make sure that your Instagram app is closed and not running in the background after turning on the airplane mode.
4. Then you can simply open the Instagram app and read the unread message without notifying the sender.
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