I have an iPhone 3GS that I don't use anymore, and I was wondering if I could download the pre-release iOS 9 build to it so that it can be useful.
Can I download pre-release software to outdated platforms, such as the iPhone 4S or below?
The minimum phone requirement for iOS 9 is the 4s, so it would work on a 4s but not on the 4 or 3gs (or earlier).