[Motorola Atrix HD] chuya6543mx:
Hi friends, first of all I am here because I don't have another options to try or I haven't found it yet here or in internet, I have a MB886 unlocked from AT&T, it was running AOSB 1.3.4(kk 4.4.2) had philz touch recovery and it just stays in infinite boot loops only turning off by entering in the ap fastboot option, from the causes I could mention the installation of the EB40 battery, but it was trouble free, and the cleaned of cache and dalvik from recovery, maybe a bad charge of static when installation? or a failure in philz touch?...

After search all about the problematic, download drivers and the computer ( windows 8) recognizing the fastboot quinara s from my cellphone, this is what I did:

-firstly, followed this post http://xdaforums.com/showthread.php?t=2334000 and nothing positive, then this http://xdaforums.com/droid-razr-m/general/fix-bricked-razr-m-4g-xt907-hd-preflash-t3135462 and nothing positive with the fastboot commands and rsd lite doesn't recognized my cellphone fastboot in wondows 8.( tried to flash MB886_att-user-4.1.1-9.8.0Q-97_MB886_FFW-20-27-release-keys-ATT-US_BuildA.xml, MB886_niimx-user-4.1.2-9.8.2Q-50_MB886_NII_TA-2-16-release-keys-NII-MX.xml and ATT_MB886_4.1.1-9.8.0Q-97_MB886_FFW-28_CFC_1FF.xml)

- I tried MYTH tools too, but it doesn't work, tried to flash MB886_att-user-4.1.1-9.8.0Q-97_MB886_FFW-20-27-release-keys-ATT-US_BuildA.xml and ATT_MB886_4.1.1-9.8.0Q-97_MB886_FFW-28_CFC_1FF.xml it shows commands like "varable not supported" or "target reported max download size of" but finished the flashing and still bootlooping.

-Followed this guide: http://xdaforums.com/droid-razr-m/general/fix-bricked-razr-m-4g-xt907-hd-preflash-t3135462 by fastboot, windows 8 and the motorola factory cable( pin 1 and 4 with +5v) could flash sucesfully MB886_niimx-user-4.1.2-9.8.2Q-50_MB886_NII_TA-2-16-release-keys-NII-MX.xml it works like a charm but was while it stayed connected to the computer, after this, flashing process only could be with the gpt_main0 file from the nextel firmware.

- Even in a sometime, I dont remember after how many flashings of the nextel firmware but was using the motocable, I could entered to my twrp recovery, cleaned all and did a clean install for AOSB KK from my SD, rebooted and bootlooping, then, I flashed again and entered to TWRP again and did a factory reset, and nothing.

- I tried MYTH tools again, but it doesn't work, tried to flash MB886_att-user-4.1.1-9.8.0Q-97_MB886_FFW-20-27-release-keys-ATT-US_BuildA.xml and ATT_MB886_4.1.1-9.8.0Q-97_MB886_FFW-28_CFC_1FF.xml with the file gpt_main0 from the nextel firmware and in one time only reach the AT&T animation then froze.

- I combined the method from the razrs and the another one for the AHD to flash all the files from the firmwares and nothing happened, even the moto cable stops of functioned , because it showed responds from the fastboot like "varable not supported" "target reported max download size of " "FAILED (remote failure)"and with a normal usb cable everything was well flashed and nothing.

- flashing with rsd lite 6.1.6 in win xp used to get Error with MB886_att-user-4.1.1-9.8.0Q-97_MB886_FFW-20-27-release-keys-ATT-US_BuildA.xml because the step of flash gpt_main0.

- I substituted gpt_main0 from MB886_niimx-user-4.1.2-9.8.2Q-50_MB886_NII_TA-2-16-release-keys-NII-MX.xml and it work with rsd in win xp (says SUCCES), just the last step when rebooted the phone, the phone stayed in boot loop.

-flashed MB886_niimx-user-4.1.2-9.8.2Q-50_MB886_NII_TA-2-16-release-keys-NII-MX.xml with RSD in win xp and fails in the last step when reboot, it stays bootlooping even when rsd says "SUCCES".

-tried to flash in ubuntu(fastboot method) with moto cable and a usb cable but never was like in windows 8, just boot loop and more boot loop.

so, here is the history of what I did it to my cellphone and he doesn't want to live anymore, so the question is, what I missed out? or what I can do it?, discarding throw it to the trash or having like a nice paperweight...

Any kind of help, suggestion, comments, or hardware modification will be appreciated and sorry for my english, I wrote the best I could.

P.D: always had a good porcentage of charge in the battery while did the flashings,charged it with 5v and 500ma directly to the battery and tested with multimeter when fastboot alarmed low battery, and anytime while phone had been flashed with AT&T relase keys rom, bootlooping was with the advertisement about the bootloader unlocked, and when had been flashed with nextel firm it shows motorola dual core logo boot loop. :confused: