This is what I found.
To obtain an unlock code for your BlackBerry:
You will need to know your IMEI number for your BB. Look at Options, Status. The IMEI may also be found on the white sticker under the battery (sometimes hard to read--make sure you read it right!).
Most carriers will give you the unlock code for your BB. Some have policies that vary from having an active account in good-standing (good payment history) to having been a customer for 90 days or more.
You can purchase the unlock code from various vendors. These listed below are reputable vendors with good feedback from users.
1. HorizonWirelessOnline <<--$5.00 BlackBerryForums member discount for unlocking.
2. GSM PhoneSource
If you purchase an unlock code from an Ebay seller, review the seller ratings.
Unlock codes are particular to each BlackBerry. They cannot be used from one BB to the next. Do not purchase your unlock code from a friend who has one and says the code was for his BB.
Unlock codes can take anywhere from 4 hours to 10 days to obtain.
Some BlackBerrys simply can't be unlocked for various reasons: The IMEI number cannot be found in the RIM database, or the device was a pre-release, not-to-be-sold device.
It is understood that Rogers Wireless (Canada) will no longer give unlock codes (as of July 10, 2007)
Don't know if this will work.