s4 pin phone lock

[Bacchus17]

My crazy office mate got my s4 and was just wondering if there is a way for him to bypass my pin without loosing the data stored on the phone (l'm pretty sure he doesn't know the pin coz it's at least 8 characters long)

Thanks in advance

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[UJ95x]

Duplicate post. Replied to the other one here: http://forums.androidcentral.com/showthread.php?t=433635