Can not access to USB Switching menu

Hi all!

I'm newbie on PDA's area . I have just up my LG KS20 to WM 6.5 build 21193.5.0.0 PV. Now, I want to use other version. But when I using 2676625720# then it show Engineering Menu. I can not setting USB Switching to "LG Composite -DUN, DIAG" because that menu can not access. Anybody can you help me?

So let me know which version of WM 6.5 is ok. My camera is not work on my version.

Thanks

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