How to disable Bluetooth ON pop up in IPhone 6 and IPhone5 through Info.plist?

Hi,


In My app developement, I have enabled the "Bluetooth ON" feature through "Info.plist" (<key>NSBluetoothPeripheralUsageDescription</key>), this switches on Bluetooth in IPhone7 and IPhone8 without any popup.


But with same app settings , it opens up a pop up for confirmation to switch on "Bluetooth" in IPhone 6 and IPhone5.


PLease advise on this. Why this happens, what is the difference in terms of UI implementation.



Regards,
Raja