Originally Posted by Trozzul
Would this work on System version 10.5.1? i saw in a q&a that it looks like i need to downgrade? can i do that at this point?
Actually, I was able to get the 2nd bootloader and everything to get CM 10.2 on my Kindle Fire 2(012) [basic version--speakers, 3.5mm jack, and power button and nothing else] running 10.5.1.
I rooted by using the browser and going to kingroot.net and downloading the app from there. It's a simple/auto-root thing so you just have to tap, tap, tap and it does it all for you. After rooting I was able to reboot into fastboot just fine. Followed the rest of this thread and luckily found a working mirror to download all the files Hashcode originally provided off an xda user--I don't remember who it was but maybe it was in this long thread? Or the "continued" discussion one? (Needless to say, the original download links don't work anymore).
NOTE: I wasn't able to install the latest CM (which is CM-11) off get.cm for Kindle Fire 2 (otter2). TWRP bootloader had some issue executing binary file within the .zip so yeah. 10.2 with appropriate GAPPS (old version, scroll down toward the bottom on the GAPPS download page) works fine and I'm running it now. You might have to install a newer version of TWRP in order to get CM 11 working instead of the one used in this original "HOW TO." Some bugs like Kindle app not working off the Play Store and being unable to unlink/sign out of my Google account but otherwise seems okay.
NOTE 2: It's nice to have it rooted and running a custom ROM for more versatility and customization, but Kindle's hardware is what it is--mediocre and/or slow. So, not an amazing improvement to the point where I'd use it everyday. At the end of it all, this felt more like just a project to see if I could--doesn't add any fundamental usability to me. Hope this was helpful.