Unless you are a frequent flyer, there's a good chance that you don't use the airplane mode given on your phone. But if you do, you know what will happen, the
How to use mobile data in airplane mode [Guide]
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How To Use Mobile Internet On Airplane Mode? Step-by-step details given here. This trick can be only used on android mobile phones only.
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Why can the Wifi work when your phone is on the airplane mode? Is your device still transmitting signals and sending information on the location? - Quora