- 1). Press or tap the "Menu" key. The Home screen displays all icons on the BlackBerry.
- 2). Scroll to and select the "Options" icon. Tap the icon on a touch screen device, or press the trackball or trackpad on non-touch screen BlackBerries.
- 3). Scroll to and select the "Security Options" link. Tap the entry, or press the trackball or trackpad.
- 4). Scroll to and open the "Firewall" option. The Firewall configuration page opens.
- 5). Check the check box in front of the "PIN" option.
- 6). Press or tap the "Menu" button. Scroll to "Save" and tap, or press the trackball or trackpad. The firewall is configured to disallow communications from other BlackBerry PINs.
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