I'm not sure if this works on the Pearl however on previous models you would hold down the Alt key and the CAP key, then press H. If that does not work you can find that information on the FCC label on the inside of the device's battery compartment.
Dont for get about 'sig' as a shortcut. It will populate with your owner information. You have to set your owner information under "Options > Owner" in order for it to populate.
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~Sent from my BlackBerry Wireless handheld~