Warning: It may be difficult for some to go back to iOS 6 (Apple says it can’t be done). iOS 7 is still a beta–it’s buggy. Update your iPhone at your own risk. Don’t say you weren’t warned. We suggest using an old, unused iPhone if you truly want to see how it works.
Apple released iOS 7 beta for iPhone yesterday right after WWDC. The company only released the iPhone build, and other versions, such as the iPad will be available in the coming weeks, says Apple.
It’s possible to install it, but you must be a registered developer. That’s $99 a year. If you are okay with parting with that money, and you’re not a developer. Then there you go. Also, keep in mind that this is beta software. It’s bound to have bugs, glitches and bad battery life. Don’t be surprised if things are bad. Still, if you want to risk it, you can. Just be prepared for the worst. We advise using it on an old, unused or backup iPhone if you have one. Otherwise, it’s probably best to wait a while. Apple does say that you won’t be able to go back to iOS 6, however we were able to revert to 6.3.1 on an iPhone 4S. We will post instructions for that soon. (Edit: Here it is)
Before anything, make sure you are running the latest version of iTunes (11.0.4) if not. Simply update through the Mac App Store.
1) First, go to Apple’s developer portal. If you are a registered developer, you have the link. It’s also available through torrents. Again, do any downloading at your own risk.
2) You must download the firmware for the beta out of the following models. It must match your device (note: below are not links, they are just reference so you can know what’s available at the site):
iPhone 5 (Model A1428)
iPhone 5 (Model A1429)
iPhone 4 (GSM Rev A)
iPhone 4 (GSM)
iPhone 4 (CDMA)
iPod touch (5th generation)
3) Connect your device to your computer and perform a backup. We suggest you encrypt your local backup. This should take a few minutes, so just let the computer do its thing.
4) After you back up, hold “Option” and click “Restore” on iTunes with your device selected. You must then direct the computer to the IPSW you need to install. (It’s the one you downloaded in step two)
5) Install the IPSW. This will take a few minutes. Grab a sandwich or something.
Your iPhone will restart:
You now have iOS 7:
6) Now, you must restore from your original backup. The purpose of this is to reinstall your apps and your settings, etc. Things are very different in iOS 7, so it will be interesting to see how well these things carry over.
You’re done. You now have iOS 7 beta on your iPhone.