[Droid Ultra Q&A, Help & Troubleshooting] Psychlone:
Hi guys.

So I purchased 2 of the Droid Minis for my kids. They are both on 12.15.15 (camera update) 4.2.2 and started bugging them to take the update to 4.4

Before letting them take the update, I wanted to root them both so I could install tracking software on them, so I followed the thread here: http://xdaforums.com/showthread.php?t=2509590

(for RockMyMoto)

PwnMyMoto never did anything but error, so I figured it was because of the camera update.

I successfully rooted BOTH XT1030 phones following the RockMyMoto OP, verified by installing SuperSU and double verified by installing TiBU from my license. Both phones are truly rooted as both asked me to grant or deny root access, and I've even checked via RootManager and it does indeed allow access.

So after following the link above and successfully rooting both phones, I started the 4.4 update on the first one and waited for it, but it just rebooted over and over, which made me stop in my tracks on the second phone.

Right now, the phone that was supposed to be taking the 4.4 update will boot all the way to a usable homescreen, but it reboots after about 20 seconds of having hit the homescreen. It's been doing this for about an hour now.

I've gotten enough time to get into Settings > About and check, and it's still on 4.2.2 (12.15.15), and even allows to check for updates before rebooting again (if I'm quick, I can even push the button to check for updates, but the device only lasts for 20 seconds before it automatically reboots.

I've tried booting into Recovery, but it just reboots into normal mode, lasts 20 seconds and reboots again.

I'm stuck, and would appreciate some help here. I'm not new to flashing, having been a crackflasher since the OG D1. Although, I have to say that these Droid Mini's are significantly harder to work with than my Note3, S4 and any of my previous phones...

help PLEASE?!

Obviously, my daughter has a bunch of games on her phone after having it since Christmas, and I'd definitely prefer not to lose her data. I had the foresight to make a TiBU backup before moving forward with the 4.4 update, but in it's current state of rebooting, it won't stay on long enough for me to copy the TiBU folder to my computer.

If I knew how to fastboot, perhaps I could fastboot the files for 4.2.2 back to the phone without losing her data - at least so I could transfer the TiBU folder over in case the phone has to be RSD'd back to stock...

If this is an option, please help me out with the exact commands that I might need. Thanks in advance!!

EDIT: I read how to fastboot (hadn't done it for a couple years) and found the correct files for the xt1030 here: http://sbf.droid-developers.org/phone.php?device=2

I downloaded and unzipped the 12.15.15 file.

I then used fastboot to push boot.img, motoimg.img, recovery.img successfully (although there is NO recovery no matter how I try to boot into it)

BUT, when I fastboot flash system.img, it comes up with several errors and fails, so I'm sure that the problem actually exists in the system image on the phone.

*** I DID NOT erase anything, only dirty flashed. I did this because I need to back up the user data before anything happens to it.

If I do erase system on the phone, will I lose her data? What about the other images that are still on the phone??

**EDIT: I found that I needed to use mfastboot instead of the standard fastboot to flash the system.img because it's apparently too big - mfastboot breaks it into smaller chunks and pushes them correctly, however, the phone still reboots.

This isn't considered a bootloop, it will boot all the way into the homescreen, stay active and live for around 20 seconds and then reboot.

I'm already going to be in trouble when she finds out she can't use her phone in the morning... PLEASE help a brother out!

Hope that info helps someone to help me better!