After trying all of the KitKat roots out there I finally found a root for the Kyocera Hydro Vibe (KYC6725) running KitKat 4.4.2 (at this time the latest version for the phone). I personally am using it on Virgin Mobile, but I assume it would work on Sprint as well.
In any event the root is called Kingroot 4.0. It's available at:
http://www.kingroot.net/root
You don't need a PC and it's basically a one-click root program. So, it's an APK you download and that you can run by enabling "unknown sources" in the security settings. Once you have it running you click on a few blue buttons and it does its thing in a minute or two. For me I had to reboot before the root took effect and Rootchecker verified that it had worked.
It should be noted that the root is in Chinese and no-one knows how it works.
This YouTube video goes over it pretty well:
In any event the root is called Kingroot 4.0. It's available at:
http://www.kingroot.net/root
You don't need a PC and it's basically a one-click root program. So, it's an APK you download and that you can run by enabling "unknown sources" in the security settings. Once you have it running you click on a few blue buttons and it does its thing in a minute or two. For me I had to reboot before the root took effect and Rootchecker verified that it had worked.
It should be noted that the root is in Chinese and no-one knows how it works.
This YouTube video goes over it pretty well: