Here How I Activated my Mobile Data in Airplane Mode on Android.

In doing this you don’t need any apps to be installed in your mobile from Play Store or third-party apps installation.
You can do this using your dial pad on your mobile.
1.Enable Airplane mode on your mobile.
2.Open your Dial pad on your mobile.
3.Type “*#*#4636#*#*” or “*#*#4838#*#*.
4.You will get the Testing screen. Select “Phone Information.”
5.Scroll down and enable Mobile Radio Power.
6.You won’t get the mobile data indication. But, you can use cellular data on your mobile.
7.To check whether it is working or not, Open your mobile browser and check with some random pages. You can also use any apps that work with the data connection.
8.You will get the same data speed on your mobile.

LEARN MORE