What is FQC(##372733##)"FQC" test app in Nokia 6?

I've foundThere are some secretdialer codes in Nokia 6, e.g: *#*#4636#*#*,*#*#2486#*#*, *#*#372733#*#*. LastThe last one starts an application named "FQC", in. In this app, there is a menu contains "receivercontaining "Receiver test","led "LED test", etc.

I think this is for factory testtesting, but after startedstarting this test mode, did my device changedchange to a test device? If yes, how can iI stop and exit this test mode? Do iI need to factory reset?

edit: Device is nokia 6

What is FQC(##372733##) test app?

I've found some secret codes, e.g: *#*#4636#*#*,*#*#2486#*#*, *#*#372733#*#*. Last one starts an application named "FQC", in this app there is a menu contains "receiver test","led test" etc. I think this is for factory test but after started this test mode, did my device changed to test device? If yes, how can i stop and exit this test mode? Do i need to factory reset?

edit: Device is nokia 6

What is "FQC" test app in Nokia 6?

There are some dialer codes in Nokia 6, e.g: *#*#4636#*#*,*#*#2486#*#*, *#*#372733#*#*. The last one starts an application named "FQC". In this app, there is a menu containing "Receiver test", "LED test", etc.

I think this is for factory testing, but after starting this test mode, did my device change to a test device? If yes, how can I stop and exit this test mode? Do I need to factory reset?