[Blu Vivo Air] Ilxaot:
Alright, so following some prodding, searching, and questioning, I flashed MIUI V6 to my BLU Vivo Air alongside TWRP.

I will update this post with a detailed, step-by-step guide including my own personal mirrors for your convenience and those of you without 4PDA accounts, which is the Russian equivalent of XDA.

Upon booting, I noticed apps force closing without being launched. Namely Hangouts and Newsstand. I'm sure reinstalling them will resolve the issue rather quickly.

Stay tuned for updates.

Update 1:

TWRP had difficulty mounting data and cache for me, and was unable to format them. This led to applications force closing, window mishaps, and accounts glitching out. I just flashed Carliv recovery, and flashed MIUI with it. Flashing gapps at the moment, and will update you on my progress.

Update 2:

Currently attempting to format data (success), cache (success), and dalvik (success).

Update 3:

Rebooting into MIUI V6, checking if I've entered a bootloop.

5 seconds - Boot animation reached, "MIUI Pro."

165 seconds - Still booting.

180 seconds - Setup screen reached, MIUI V6 flashed successfully.

Update 4:

Google apps flashed successfully, no redraws or force closes this time. Had an issue with the keyboard not registering as being selected, Google voice typing appeared as the default. Pull down notification shader and "choose input method" to select MIUI Smart Keyboard. Signed into Google successfully. Will run preliminary tests on video playback, camera, and multitasking.

Guide:

If you mess up your phone, it is on you, and I am not to be held liable for your actions. This is your responsibility. A lack of planning on your part does not constitute an emergency on mine. With that out of the way, if you encounter troubles, I am more than happy to help you. (:

Step 1:

Root your phone using one of the links provided. Click HERE for method 1, or HERE for method 2. I personally used method 1 because it was the first I saw. They both get the job done.

Step 2:

Install THIS application (Settings -> Security -> Unknown Sources), and install a recovery. I installed Carliv recovery, and had no problems with it. You can also install TWRP, however, it had issues mounting data and cache. This left it unable to factory reset when I flashed MIUI, which subsequently led to problems. I do not recommend flashing TWRP - You have been warned. Carliv recovery says it can't "mount" cache, although when formatting it does so without a problem. I believe Carliv is supposed to be touch-based, although the touches weren't responding for me. The controls are as follows: Volume +/- for navigating, Power for selecting, and the Back key for, you guessed it, going back.

Step 3:

Install MIUI V6, located HERE, and then install Google Apps, located HERE. After installing, factory reset the device from recovery and reboot into the system. I posted my timestamps at the top of the post, so you can get an idea of how long your flash/boot process should take.

Step 4:

Basic setup. Be ready to fix your keyboard if you had the same issue I did, which isn't even necessarily a problem. Choose WLAN network and sign into your accounts, then you're good to go.

To root the ROM, I recommend finding "iRoot" for your computer. Then boot to recovery and install the SuperSU zip, as it's better than the root app which comes with the iRoot method.

Enjoy your ROM, and be sure to thank our Ruski comrades over at 4PDA!

Special thanks to [MENTION=5359685]DvDwx.[/MENTION] (research), [MENTION=5516090]itsJohnuno[/MENTION] (answers), and [MENTION=3082108]Milly7[/MENTION] (testing).

All download links are being hosted by me, and I recommend creating mirrors of your own as safety precautions in the event that the files are removed or become unavailable.

Have a phenomenal day or night, possibly even both. If you have any questions, I'll do my best to answer them.