Apple has been working on iOS 10.3.2 for some time now and it has reached the iOS 10.3.2 public beta 3 of the release including some minor bugfixes and improvements.
Apple released iOS 10.3.1 at the end of march containing some improvements to the introduced 10.3. But the update contained some serious security issues such as the code (793) which could shutdown and corrupt your device if entered into the messaging. Apple is working on iOS 10.3.2 also to bring some improvements to the newly introduced Apple File System (APFS).
According to Apple’s changelog, nothing much has change in this beta release so perhaps all the improvements has been done under the hood.
According to Apple’s pattern in beta releases, we are still far away from a final release. And we could expect another 3 or 4 betas to come.
You can go ahead and download the new releases of iOS 10.3.2 Public Beta 3 by going to Settings -> General -> Software update.
Ofcourse you have to be a participant in Apple beta program first.