Oct 27, 2011

How to unlock Motorola Atrix bootloader got from Expansys (4.4.35.MB860.Retail.en.GB)

While rooting the device has been harder than I thought, bootloader unlock has been very simple to be achieved.
I verified by myself the method described on XDA – [PUDDING] International House of Pudding! BL Unlock/root thread and works fine for our rooted Motorola 4.4.35.MB860.Retail.en.GB.

Some important notes:

  • Our smartphone needs the file labeled Orange/Bell/Telestra/Latin America/International users ONLY – Download IHOP, NOT the other one
  • If you are a windows user, just follow the thread
  • If you are a GNU/Linux / Mac OS X user, use sbf_flash instead of RSDLite
  • It was not easy for me to find out that to flash SBF we must power off the phone, power it on while holding the VOL DOWN button, press the VOL DOWN button up to we see the “RSD” text, and press VOL UP to select it. Then we can safely flash it.
  • Please install custom ROMS. don’t install Motorola Gingerbread update when it comes out in Europe, they will block the bootloader again and you will probably brick the device

Remember that unlocking the bootloader will void your warranty. Happy hacking.

written by dgraziotin

Dr. Daniel Graziotin received his PhD in computer science, software engineering at the Free University of Bozen-Bolzano, Italy. His research interests include human aspects in empirical software engineering with psychological measurements, Web engineering, and open science. He researches, publishes, and reviews for venues in software engineering, human-computer interaction, and psychology. Daniel is the founder of the psychoempirical software engineering discipline and guidelines. He is associate editor at the Journal of Open Research Software, academic editor at the Research Ideas and Outcomes (RIO) journal, and academic editor at the Open Communications in Computer Science journal. He is the local coordinator of the Italian Open science local group for the Open Knowledge Foundation. He is a member of ACM, SIGSOFT, and IEEE.

  • leigh Nov 17, 2011 Reply

    thanks again. this worked.
    Now to go find some good roms

    • dgraziotin Nov 18, 2011 Reply

      You’re welcome. If you’re having the same phone as mine, I am happy to announce you that yesterday they posted Gingerbread for our Atrix version. You will need it because it contains a suitable Radio for any GB Rom you would like to install then. Follow the instruction of this post to install it.
      Then you will be free to choose which ROM to install.
      From my personal experience, the best battery life is with the stock ROM. But feel free to experiment!

  • leigh Nov 18, 2011 Reply

    yep i have the gb version – i tried to install gingerblur and looks like a soft bricked it

  • leigh Nov 18, 2011 Reply

    i can see the device in rsd. i will try to learn how to flash a rom with it and see if that fixes.

  • martin Apr 21, 2012 Reply

    do you know if this will work with 45.31.0.MB860.Retail.en.GB

    • dgraziotin Apr 23, 2012 Reply

      I don’t think it will work. Moreover, be cautious when unlocking an Atrix running Gingerbread, you can brick the phone.
      Try to perform a search on XDA forums, or ask in the Q&A sub-forum.
      Good luck

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