Apple has released iOS 10.3.2 beta 4 to developers for testing. The build number is 14F5086a. Members of the Apple Developer Program can now deploy iOS 10.3.2 beta 4 (build 14F5086a), macOS Sierra 10.12.5 beta 4 (build 16F67a), watchOS 3.2.2 beta 4 (build 14V5485a) and tvOS 10.2.1 beta 4 (build 14W5583a) through the Software Update mechanism.
If you were looking for big feature additions or huge differences in how iOS 10.3.2 beta 4 looks when compared to previous iterations, then we are afraid you are going to be sorely disappointed. You can view the full release notes highlighting changes, fixes, and known issues below.
On your fourth-generation Apple TV set-top box, tvOS 10.3.2 beta 4 can be installed in Settings → System → Software Updates → Update Software.
On your Apple Watch, watchOS 3.2.2 beta 4 can be deployed in the Watch app on your iPhone by tapping My Watch → General → Software Update.