Usb_modeswitch on air unit

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I’ve try few different props found around internet but no success yet

# getprop | grep dns                                                                                    
[net.change]: [net.eth0.dns1]
[net.dns1]: [8.8.8.8]
[net.eth0.dns1]: [8.8.8.8]
[ro.kernel.android.ndns]: [1]

I’m not a master of android (you probably guess it already)

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# ndc resolver                                                                                          
Error connecting (No such file or directory)

I have an issue with ndc calls (any calls with properly made params or not)