Downloads

Download Linage OS
https://download.lineageos.org/a7y17lte
or
Download Linage OS with MicroG
https://download.lineage.microg.org/a7y17lte/

Download Heimdall
https://androidfilehost.com/?w=files&flid=304516

Download TWRP
https://dl.twrp.me/a7y17lte/

Enable Developer Options

Enable Developer Options by pressing the “Build Number” option in the “Settings” app within the “About” menu

Connect USB Cable

Boot Into Download Mode

Power off the device, and boot it into download mode:
With the device powered off, hold Volume Down + Home + Power.

[CONTINUE]

Installing a custom recovery (TWRP) using heimdall

COMPUTER
heimdall flash --RECOVERY recovery.img --no-reboot

Heimdall v1.4.2 Copyright (c) 2010-2017 Benjamin Dobell, Glass Echidna http://www.glassechidna.com.au/ This software is provided free of charge. Copying and redistribution is encouraged. If you appreciate this software and you would like to support future development please consider donating: http://www.glassechidna.com.au/donate/ Initialising connection… Detecting device… Claiming interface… Setting up interface… Initialising protocol… Protocol initialisation successful. Beginning session… Some devices may take up to 2 minutes to respond. Please be patient! Session begun. Downloading device’s PIT file… PIT file download successful. Uploading RECOVERY 100% RECOVERY upload successful Ending session… Releasing device interface…

If for any reason you need to leave Download Mode it can be done by holding Volume Down + Power for 7 seconds

Disconnect USB Cable

Manually reboot into recovery

Leave Download Mode (Work Around Due to no removable battery)
Both steps below must be done in quick sucsession

Volume Down + Power (7 Seconds)

With the device powered off, hold Volume Up + Home + Power.

Team WIn Recovery

Wipe Disk

>>> Swipe to unlock
>>> Swipe to allow Modifications
[Wipe][Format Data]

This cannot be undone.
Type yes to continue. Press back to cancel.

yes
[Back]
<
[Advanced Wipe] [Cache] + [System]
>Swipe to Wipe>

Side Load Linage

<
<
[Advanced]
[ADB Sideload]

COMPUTER
adb sideload ./lineage-16.0-20290621-nightly-a7y17lte-signed.zip

Optional Root Device

LineageOS’ AddonSU, (use the arm64 package)
Download
https://download.lineageos.org/extras

PHONE
[Advanced]
[ADB Sideload]

COMPUTER
adb sideload ./addonsu-16.0-arm64-signed.zip

Reboot

COMPUTER
 adb reboot

Links

Linage OS Install Guide