Recently got a Samsung S4 (SGH-1337M) running 4.2.2. This is a provider 
locked phone (don't have intent yet on rooting/unlocking). There seems to 
be a security flaw at the moment - there is virtually unlimited access via 
USB even when the phone is password/PIN/etc locked. Is there a way to 
either 1) prevent USB access; or 2) add protection. I've gone through 
developer options and my screen doesn't show a "Protect USB" but instead 
shows "Protect SD."

Any help would be greatly appreciated! Thanks!

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