I have an Unlocked/Jailbroken 2G iPhone that currently has Carrier version 2.9. I am a T-Mobile customer and I am using firmware 2.2.1 and the latest iTunes. I know there was an carrier update released this month, but iTunes is not notifying me for installation. I need to update because it is supposed to resolve an issue with connecting to Garmin GPS systems via bluetooth. Is there a way to download and manually install the update? Thanks in advance for any help. It is greatly appreciated.