Enable USB in Android 4.2

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Hey guys, so I found this cool fix to change the function of the USB to mass storage instead of MTP.

Open up terminal emulator and enter in:

su
setprop persist.sys.usb.config mass_storage,adb
reboot

If you want to go back to MTP, open terminal emulator and enter:

su
setprop persist.sys.usb.config mtp,adb
reboot

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Does it change between (USB) | (MTP/PTP) modes?
Could you compare setting to find which on was changed?

Looks like for ICS it should be:
adb shell setprop sys.usb.config mtp,adb
adb shell setprop sys.usb.config mass_storage,adb
or with persist (after reboot)
adb shell setprop persist.sys.usb.config mtp,adb
adb shell setprop persist.sys.usb.config mass_storage,adb