Apple has released a few hours ago the fifth beta of iOS 9.3.3 in the developer portal, which as you know, will not include any new feature or function as it is a minor update.
How I said, this is just a minor update which aims to solve some small problem that is still existing in iOS 9.3.2, so practically we can confirm that it will not add anything new.
On the other hand, I remind you that during yesterday Apple released the second beta of its new operating systems, ie, iOS 10 macOS Sierra, watchOS 3 and TVOS 10 so that iOS 9.3.3 has just time the quota of new betas.
As always, if you have installed an earlier beta you can upgrade directly from the device itself by going to "Settings -> General -> Software Update" while you have to use iTunes should have iOS 9.3.2 or previous.
Finally, seeing that we are already at its fifth beta, if there is any last minute problems, it is likely that the final version of iOS 9.3.3 is released next week.
Note: If you instaláis any of the betas of iOS 9.3.3 do not can return to iOS 9.1 or iOS 9.0.2, which prevents, at least for now, jailbreak the device.