The sixth beta of iOS 9.3 has just been seeded to developers. This comes one week after the last seed. There are many new features with this version of iOS. We see 3D Touch on some of Apple’s other apps, better recommendations with the News app, a Night Shift display mode, and more. Since these betas are coming so close together we’re guessing that we’ll see this version release very soon.
For registered developers, you can go to Settings > General > Software update > iOS 9.3. From there you can download the latest build of iOS on your compatible devices.