Mobile phones have an hidden feature to access network, voice and data even if the phone is in flight mode. There are 2 methods.
Method 1
Disable auto blocker on those phones which have this feature
Go to phone dial pad and type *#*#4636#*#*
A menu will open like this.
Enable mobile radio power. Exit this menu. You can now use your phone to call and access data. Once done switch off airplane mode. The phone will be back to normal.
Method 2
If access code shown above does not work then go to play store and download Force LTE app and enable mobile radio power. You are done. To revert back. Open the app disable mobile radio power and then switch off airplane mode.
