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Fix GPS issues (and SIM)

Discussion in 'ZUK Z1' started by AdB, Jan 22, 2018.

  1. AdB

    AdB New Member

    Jan 22, 2018
    Likes Received:
    Thank you all, I fixed my ZUK Z1 GPS problem

    Here is my tutorial with all needed files :

    This is how to repair broken GPS on Lenovo ZUK Z1

    1. Flash Lenovo ZUK Z1 with 7DF stock rom :
    This ROM sucks because it is Android 5.1.1 BUT it is the only way to fix GPS baseband
    (See : zukfans.eu/community/threads/howto-fix-gps-issues-and-sim.5908)

    2. Once 7DF firmware is flashed, download "GPS Test" app and play with GPS : for sure it will work again ;)
    Note : this step is mandatory before step 3 !

    3. As Android 5.1.1 sucks, for sure you want to install last lineage android 7.1, with GPS fixed ! :)
    Follow the steps 3 to unlock this old Android (stechguide.com/unlock-bootloader-of-lenovo-zuk-z1/)

    4. This old version of TWRP (twrp-3.0.2-0-Z1.img) will work with ZUK Z1 Android 5.1.1, but there is a trick :

    Once you are in fastboot mode, flash twrp with the following command and DO NOT REBOOT !
    fastboot flash recovery twrp-3.0.2-0-Z1.img (DO NOT REBOOT YET)

    Then, press Volume + AND Volume - simultaneaously and send this command :
    fastboot reboot (keep Volume + and Volume - down until you see TWRP on screen)

    5. Install last lineageOS : Follow official instructions as usual.

    Note : this procedure (steps 1 to 5) has to be repeated from step 1 each time you decide to install a new lineage update.... overwise you will get a bad GPS reception

    I wish you a successfull GPS repair (this procedure is 100% tested many times on my Lenovo Zuk Z1)

    portento likes this.
  2. portento

    portento New Member

    Mar 8, 2018
    Likes Received:
    Thanks for the guide!
    Can you update the download link?
    It seems not to work...

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