Unfortunately for some HTC EVO 3D owners, getting rooted isn't as easy as we all would like it to be. If you're rocking an hboot version that is 1.5 or higher, then you can only get fake root through the htcdev.com website, but not the full s-off, bootloader unlocked root that we'd all rather have. Of course, that doesn't mean that there aren't people working on that.
Well, Mobotniks, if you're rocking an HTC Evo 3D and you're on Vodaphone, there's a chance that you may yet be able to achieve full root with relative ease as there has been a method uncovered that will allow people to downgrade from the 1.5 hboot and achieve full s-off goodness.
First thing is first. You're going to have to check your CID. In order to do so, there's a simple application in the Android Market that will do it for you. The application is called CID Getter and if you're having problems finding it, simply click the link to go directly to its Market page.
Next you're going to need your Evo 3D rooted via the htcdev.com website. Lastly, you're going to need a Windows PC as this tool does not yet work on Linux or Mac computers.
Once that's done and you have your CID on hand, check it through this list of compatible CID's:
HTC__001, HTC__032, HTC__A07, HTC__102, HTC__304, HTC__203, HTC__E11, HTC__N34, HTC__405, HTC__Y13, HTC__016, HTC__J15, VODAP001, VODAP102, VODAPE17, VODAP304
If yours happens to be in the list above, then you've won the lottery. Well not the real lottery, sadly, but the one that will allow this tool to work. If not, then you cannot downgrade your HTC Evo 3D just yet. No worries, they're working on it for you folks.
Choose whichever one of these tools applies to you and download it - for unbranded Evo 3Ds and one for Vodaphone Evo 3Ds. Then, plug in your phone with USB Debugging on and charging only and run Step1.exe. If you are error free afterward, run Step2.exe to downgrade your hboot version. A note from the developer states that if it hangs at the end, then it's already done. Simply pull your battery and reboot the phone.
From there you are now working with an hboot version of 1.4 or lower, allowing you to get fully unrooted with the wonderful tools found at revolutionary.io. You may now set your device upon a solid surface and do the victory dance of your choice, because you are finished. Now it's simply following the instructions the good folks at Revolutionary have given us and you'll be all the way rooted. Until next time Mobotniks!
Source: XDA Developers