If you’re using a T-Mobile BlackBerry 8900 with an OS lower than 4.6.1.231 – then head to the T-Mobile site and grab this latest operating system update. Sadly the over-the-air upgrade capabilities of the BlackBerry 8900 are not available for this upgrade (why do carriers and manufacturers advertise capabilities such as this if they’re not going to be active?!!). New features include better UMA, better battery life and an improved MyFaves experience. Whatever that means.

BlackBerry 8900 OS 4.6.1.231 via CrackBerry