The beta version of iPhone OS 3.0 (build 7A238j) was made available on Apple’s Developer Connection website yesterday. Here are the steps to install the new OS (as tested with an iPhone 3G):
- Sync the phone to iTunes and backup all data! Subsequent steps will wipe out the iPhone and you will need a backup to restore from.
- On a Mac which has your iPhone SDK and Xcode, download the OS 3.0 build. It’s about 229 MiB.
- Connect your iPhone to the Mac.
- Drag and drop the downloaded file iPhone1,2_3.0_7A238j_Restore.ipsw onto Xcode.
- The Xcode Organizer should open up and display your phone with multiple firmware choices – the existing firmware on the phone (I was using 2.2.1) and the new 3.0 firmware. Select the new 3.0 firmware and restore it to your iPhone. This will wipe out all data on the phone! The process takes about 12-15 minutes to flash the phone and update the baseband. At the end the phone will reboot and ask to be connected to iTunes.
- Connect the phone to iTunes. At this point, iTunes will ask you if you want to setup as a new phone or restore your existing backup. Choose to restore the backup and let iTunes restore the data on the phone. It took about 30 minutes to do this with my phone.
- Again, the phone will reboot and sync with iTunes. At this point, a normal sync will happen and install all your original applications.
Feature hands-on reviews in a subsequent post.