How To: Set Security on Your iPhone
So you have your KLZ E-Mail working nicely on your iPhone but you need to secure your device, incase you lose it, it is stolen or even someone wants to take a look at your device when you have left it on the side...
By default we do not enforce any security policies on your devices as they belong to you, but we can set up policies centrally for your school if you wish.
To enforce an auto lock and PIN number on the iPhone follow these simple steps.
Press Settings and then General

Press Auto-Lock and change it from Never to about 2 or 3 minutes.

This means the device will lock automatically after 2 minutes, or whetever time you define, of inactivity.
Now back at the General screen press Passcode Lock and enter a 4 digit PIN

You'll be asked again to verify it.
Now here are the settings to tweak the passcode.

It may seem a little annoying to enter this PIN most times you want to use the iPhone but it is important for the security of your e-mail and data.
The PIN settings do not interfere with receiving calls.