I Own the Tmobile Blackberry Javelin 8900 Unlocked, and use it in my country the Dominican Republic (Latin America).
My Current OS is V4.6.1.114 and reading in the forum i noticed that there are a lot of OS upgrades that my Desktop Manager wont notify me.
Im kinda new on the BBworld, so please help me downloading and installing the latest OS and telling me if it can damage my device, which i got with a lot of trouble since in my country wont sell it directly from the carrier.