Blackberry - "My Number" is "Unknown"

When you go to make a call, you notice that "My Number" doesn't actually list your number, it just says "Unknown".  You can manually add this by doing the following:

Go to Settings > Options > Advanced Options > SIM Card

Click the button just to the left of the trackball to bring up an options menu and select "Edit SIM Phone Number".

Enter your phone number and press the trackball to save the number.

Done!

Blackberry Won't Turn On

I've seen it several times:  a user's Blackberry stays powered off with a black screen.  This likely happened after you disconnected your phone in the middle of an update.  The only indication of life is the blinking red light in the corner.  Nothing seems to wake it up and the Desktop Manager doesn't recognize that anything is connected.  What do you do?

This:

1)  Make sure you have Blackberry's Desktop Manager installed.
2)  Go to Start > Run and copy and paste the following line exactly (meaning with the quotation marks):

"c:\program files\common files\research in motion\apploader\loader.exe" /nojvm

3)  The Application Loader Wizard will appear -- click "Next."
4)  In the "Connection:" drop-down menu, you should see "USB-PIN: UNKNOWN".  Click the "Next" button.
5)  You should then see a list of applications ready to be installed for your Blackberry.  Hit Next and Finish and you are well on your way to getting your Blackberry back to life. Congrats!  Just don't disconnect anything and let the lengthy process finish completely.

NOTE:  If you do not see a list of applications mentioned in step 5 and instead see the message "The Blackberry Desktop Software does not have Blackberry Device Software for the device that you have connected to the computer.  Contact your wireless service provider or system administrator," then you must download Blackberry's Operating System for your carrier and device.  Just select the appropriate carrier and network type, select your Blackberry model from the list and download the latest version.  Install this download and follow the above steps again and you should be on the right path.

Duplicate Contacts on Blackberry Using Blackberry Enterprise/Professional

If a Blackberry isn't wiped out prior to configuring it for use on Blackberry Enterprise Services, then duplicate contact can appear, causing a frustrating need to delete the unwanted entries one by one.  Sometimes this can also occur if a user attempts to synchronize from the Blackberry Desktop Manager on their computer.  Two "Desktop" contact lists are shown on the device and one of them is configured for wireless synchronization.  You can't clear out an address book database on a BE blackberry because it's marked as read-only -- what do you do?

You reset the address book from the device, which completely clears the address book and repopulates it based on the Blackberry Enterprise Server information:

1.  On the Blackberry device, go to Contacts and open Options.
2.  Type:  rset (there isn't a field to type it in, just type it while Options is open.)
3.  Confirm that you want to wipe the contacts.

The address book will then appear blank, but will soon repopulate with the current contact information.