Apple iOS developer team has been quickly working around with the latest iOS 9 update and it looks like that at this rate we might have iOS 10 going official at this year’s fall event. As of in the first week of May Apple has seeded fourth beta for both iOS 9.3.2 and OS X 10.11.5 El Capitan to registered Apple developers and the public testers. Although iOS 9.3.2 might be a minor update moving from iOS 9.3 it includes significant number of bug fixes and features.
You can get iOS 9.3.2 Beta 4 on your device via over the air or you can go to Apple developer center to download it. Similarly OS X 10. 11.5 can be updated through software update mechanism via the Mac App Store. Alternatively Apple developer centre is the way to go.