T-Mobile Releases BlackBerry OS 4.0 Upgrade

T-Mobile BlackBerry Upgrade Page

I noticed this afternoon that the long-awaited OS 4.0 (from 3.8) upgrade for my Blackberry 7100t is now available from T-Mobile.

I downloaded and installed the update (both the Desktop Manager and the Blackberry itself), and things went quite smoothly. The update process can take quite a while (restarts of the device while it’s updating can take upwards of 20 minutes, so be patient), but all of my emails, contacts, and settings were preserved.

Read on for my initial impressions.

Overall, the new OS feels snappier and quicker. No major new features were introduced, except that you’re supposed to be able to view images in email attachments now (haven’t tested that yet). Besides that, I’ve only noticed a few slight UI changes (the Browser now gives more status detail while it’s loading a page, etc.).

One big bug I really hope they fixed is the Bluetooth problem where every few hours, the Blackberry would lose pairing with my headset, then hard reset itself (and take 5 minutes to come back after the reboot) when I turn Bluetooth off to fix the problem. Annoying. It hasn’t happened so far, but I’ve only been running the update for a few hours.

Anyway, if you’re feeling adventurous, go get the update. There’s lots of discussion on it over at