A long time ago my Nexus 4 was doing an OTA update and crashed midway through. Now when I try to power it on it shows the google symbol then a standing Android with its chest open and a progress bar under it. The progress bar says "Installing System Update...". Then when about 25% through (A few seconds) the Android is laying down with its chest open and a red triangle with a exclamation mark over the Andriod. The screen says "Error!". If I wait a few minutes then it repeats this process.

I have searched the internet for long hours without finding any solution. I sadly don't have USB de-bugging on or my problem would have been solved long ago.

I currently have Ubuntu 16.04 and Windows 7 and I can't seem to mount the Nexus on either one. When I enter recovery mode it has the same dead Andriod and it says "No Command". I have factory-reset it and wiped the cache partition but neither helped in anyway.

I am not sure but I believe to update from ADB I need USB de-bugging activated and the Nexus needs to be connected to my computer. (Both things I can't do) All of the solutions I find need USB de-bugging enabled and I can't find any way of activating it while it is in it's current state. When I load fastboot mode this is what it says in the bottom.

  • PRODUCT NAME - mako
  • VARIANT - mako 16GB
  • HW VERSION - rev_11
  • BASEBAND VERSION - M9615A-CEFWMAZM-2.0.1700.84
  • SERIAL NUMBER - 029965911c4e2725
  • SIGNING - production
  • SECURE BOOT - enabled
  • LOCK STATE - locked

I don't know if that will help but I'll put it here anyway. I think that is all and I greatly appreciate any help given.

  • I'm not familiar with the Nexus line – but widely supported as it is, there should be some half-way up-to-date ROMs available, plus TWRP. Download both, install TWRP and boot into recovery. Now you should have ADB available, and can "push" the ROM to the internal SD card. That done, you could flash it. As you've already factory-reset anyway, do that again to be on the safe side, then reboot. It should boot up again now. Please report back after having tried this. Fingers crossed!
    – Izzy
    Jul 12, 2016 at 20:34

1 Answer 1


USB Debugging is not relevant, it doesn't come into play here, but you must be able to connect it to your computer via USB.

The first thing you have to do is unlock the bootloader, luckily the Nexus 4 does not require anything special to unlock the bootloader. From the fasboot screen, on your computer use the command:

sudo fastboot oem unlock

And follow the instructions on the screen to confirm the unlock and wipe process.

If this fixes it, your done... But to flash the latest firmware, you can go to: https://developers.google.com/android/nexus/images which has the images and instructions to flash the device from the bootloader (fastboot). It is literally as simple as downloading the appropriate image, expand the archive, and run ./flash-all.sh script

If you need adb and fastboot, they are available in the normal Ubuntu software repositories.

Nexus devices are wonderfully simple to work with, and are virtually unbrickable.

  • Comments are not for extended discussion; this conversation has been moved to chat.
    – Andrew T.
    Jul 30, 2022 at 16:52

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .