We turn to BerryReview.com this morning to check in on a popular topic: Do your carrier and device support an upgrade to the newest BlackBerry OS? That question can be answered just by knowing your PIN. Head to https://www.blackberry.com/hhupgrade/, and enter it in the field. You’ll then be taken to your carrier’s home page, which will be waiting with further instructions.
From there, you can check out our guide to upgrading your BlackBerry OS for step by step instructions. Even if you’re not eligible to upgrade to OS 4.5, you might have have some kind of upgrade available.
BerryReview also provides a few other links, including an article on web-based device software upgrades, the restrictions thereof, and the system requirements.