For iOS/iPhone Devices
First find and open the Settings app on your device.
Confirm Airplane Mode is Disabled if it is green then tap the slider 1 time to turn it off.
For Android Devices
First find and open the Settings app on your device
📝 There are many different style of icons, but it will generally look similar to those pictured, with a gear or cog wheel in the center
From the settings menu, select Airplane mode or if you do not see it Network & Internet or Mobile Network and then Airplane mode
Once there just confirm Airplane mode is OFF, if it is ON tap the toggle switch 1 time to turn it off.