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# /e/ wiki
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## Install /e/ on Essential PH1 - *"mata"* ([Community](../status))
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>>>
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This device is supported by **community**. More informations [here](../status)
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>>>
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>>>
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**Very important: please read the following carefully before proceeding!**
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Installing a new operating system on a mobile device can potentially:
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1. lead to all data destruction on the device
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1. make it an unrecoverable brick.
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So please only flash your device if you know what you are doing and are OK with taking the associated risk.
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The /e/ project and its project members deny any and all responsibility about the consequences of using /e/ software and/or /e/ services.
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>>>
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### Notes
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Some useful additional information can be found at:
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1. https://forum.xda-developers.com/essential-phone/development/rom-lineageos-14-1-essential-ph-1-mata-t3703759
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1. https://forum.xda-developers.com/essential-phone/development/stock-7-1-1-nmj20d-t3701681
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1. https://mata.readthedocs.io/en/latest/
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### Requirements
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1. *Highly recommended*: it is recommended that you have an /e/ account (like: john.doe@e.email) if you want to benefit from /e/ account integration for all online services such as: email, drive, calendar, notes, tasks.
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[Register for your free /e/ account](create-e-test-account).
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1. Make sure your computer has working `adb` and `fastboot`. Setup instructions can be found [here](https://wiki.lineageos.org/adb_fastboot_guide.html).
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1. Enable USB debugging on your device.
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1. In can of issue, please use another USB cable than the one provided by Essential
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1. Please read through the instructions at least once completely before actually following them to avoid any problems because you missed something!
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### Unlocking the bootloader
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1. Unlock bootloader
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```shell
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fastboot flashing unlock
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```
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1. Unlock critical partition
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```shell
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fastboot flashing unlock_critical
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```
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### Flashing firmwares
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1. Download the [NMJ88C archive](https://mega.nz/#!1CgF3SLa!CHLLA0HvtDtzzDnOl3CbJ1EUnhR6vFb4NA9IG6au3to) and unzip it
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1. Reboot in bootloader mode
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```shell
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adb reboot bootloader
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```
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1. execute the script:
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On Linux or MacOS X:
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```shell
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./flash-all.sh
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```
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On Windows:
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```shell
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./flash-all.bat
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```
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(it takes a while to complete)
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### Installing a custom recovery: TWRP for Mata
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1. Download [TWRP for Mata](https://androidfilehost.com/?fid=818070582850502775)
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1. Connect your device to your PC via USB.
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1. Flash TWRP to the boot partition:
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```shell
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fastboot -w
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fastboot flash boot twrp-mata_11.img
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```
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1. Stay in bootloader mode, and use the volume down to select "Recovery mode". Then hit the power button: this should boot you in to recovery mode (TWRP). If it's asking for a password, enter your previous lockscreen password or pin, this will decrypt your data partition. Note: don't be surprised that TWRP will be erased at next boot. Therefore, you will have to reinstall it if you want to install another ROM on your device.
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### Installing /e/ from custom recovery
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1. Download the /e/ install package that you’d like to install from [here](https://images.ecloud.global/dev/mata/).
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1. In recovery mode, put your device in sideload mode:
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```shell
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adb shell twrp sideload
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```
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1. Flash the /e/ .zip package:
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```
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adb sideload </e zip file>
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```
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1. Once installation has finished, you can reboot
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<i>"Install /e/ on Essential PH1 - *"mata"*" is licensed under [CC BY](https://creativecommons.org/licenses/by-sa/3.0/) by e Foundation 2018.</i> |
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Our wiki moved to doc.e.foundation! Please find documentation to install /e/ on this device [here](https://doc.e.foundation/devices/mata/install). |
