Can you please specifically list the steps that occur and where it "fails" for you? There are many ways to invoke the payment flow and many different screens, some of which are customer facing and some which are not.
Yes, on a sandboxed Flex, from an app in customer mode:
Dip a card invoking the sale app.
Press "1", ringing in $0.01.
Press "Cash"
Press "$0.01"
Press "Continue" causing the "All Done" screen to appear.
Touch the screen, and at this point you can see the customer mode lock disengage and you can use the Android navigation bar to close out of the Sale app and the original customer mode locked app.
You then have full access to the device with whatever permissions it was currently punched in with.
Thanks, Heath
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