How to use internet in flight mode

Hello Everyone ! In this blog I am sharing how to use internet in flight mode ! 

At first enable data connection & next turn on flight mode ! 

Next open phone app

Dial this *#*#4636#*#* ( noraml android ) 

Vivo *#*#4838#*#* 

*#*#4636#"#" 

Asus ( stock android ) 

*#*#4636#"#* 

Huawei 

*#*#0000#*#* 

*#*#6130#*#* 

*#*#225#*#*

Redmi / Mi / Xiomi 

*#*#4636#*#* 

*#*#426#*#*

*#*#6484#*#*

Otherwise 

Go to settings / phone about / find hidden settings device information 

Oppo 

*#899# 

*#*#4636#*#* 

Realme 

*#*#4636#*#*  

Search google testing menu for realme secret codes 

Thanks !