How do I install/upgrade to iPhone OS 2.0?
Just one day in advance of the sale of iPhone 3G models which will come pre-loaded with iPhone OS 2.0, Apple has publically released the new iPhone operating system/firmware to the public. Owners of the existing, first generation, Apple iPhone are now free to upgrade their iPhone to OS 2.0 and start enjoying the new features, including the iPhone AppStore.
Upgrading is very easy. Simply follow the steps below and you'll have your iPhone up and running with the latest and greatest iPhone operating system.
Note: unlike traditional iPhone firmware updates, updating from pre-2.0 to 2.0 will result in the erasure of the media (songs, photos, etc) from your iPhone. Thus, for those of you that have performed an iPhone restore before, the process will be more akin to such. Once you have upgraded, you'll need to re-sync all of your media and information. As such, we strongly recommend you sync your iPhone before upgrading.
1) if you haven't already, upgrade your iTunes to version 7.7.
2) connect your iPhone to your Mac/PC and click the Update button on the iPhone tab
That's it. (Yep, really).
If you want to download the firmware manually, and use the force iPhone firmware method to ugprade your iPhone to OS 2.0, you can do that to. You can download the OS 2.0 firmware from Apple via this link.