When you enable Airplane (Flight) mode, all wireless radios on
HTC Desire 820G+ dual sim
are turned off, including the call function, data services,
When you disable Airplane mode, the call function is turned back on and the previous state of
Wi-Fi is restored.
If USB tethering is turned on, enabling Airplane mode turns it off. You need to manually turn USB tethering on after you disable Airplane mode.
Press and hold Airplane mode.
, and then tap
When enabled, the Airplane mode icon
is displayed in the status bar.