Airplane mode hasn't been necessary for nearly 20 years, but the myth persists.
You Don’t Need to Use Airplane Mode on Airplanes | Airplane mode hasn't been necessary for nearly 20 years, but the myth persists.::Airplane mode hasn't been necessary for nearly 20 years, but the myth persists.
I read this years ago and it has always worked for me: sometimes your phone goes into a state where mobile data or even calls stop working (on android at least). Not often .. but it happens. I used to restart the phone, but then someone mentioned that turning airplane made on for a few seconds and then turning it off again restarts the whole mobile comms stack / services. And I can confirm that 99% of the time it fixes any 4G or 5G connectivity issues without needing a restart.