Two weeks after it was published the third, Apple has just released the fourth beta of iOS 10 in the Developer Portal.
As usual, the Cupertino have not made it clear what their new, limited only to report that "solves problems and improves overall system performance" are.
In this way, we will have to wait several hours for developers to check Apple itself has included some new matter how small.
As for downloading, all that you have installed a previous beta can upgrade directly from the device itself by going to "Settings -> General -> Software Update."
Finally, I remind you that once installed the beta can return to iOS 9.3.3 version on the other hand already has a public jailbreak, so if you are curious can install it without any fear.
Do any of you are testing the betas of iOS 10?