Firmwares
the latest firmware as of time of writing is February's 2020 OTA (BECKHAM_RETAIL_9.0_PPWS29.131-27-1-18_subsidy-DEFAULT_regulatory-DEFAULT_CFC) =
https://mirrors.lolinet.com/firmwar...ubsidy-DEFAULT_regulatory-DEFAULT_CFC.xml.zip
previous OTAs RETAIL variant can be found here =
https://mirrors.lolinet.com/firmware/moto/beckham/official/RETAIL/
future OTAs possibly here =
https://androidfilehost.com/?w=search&s=beckham
other variants =
https://mirrors.lolinet.com/firmware/moto/beckham/official/
Unlock Bootloader
first you need to install Motorola Drivers =
https://support.motorola.com/us/en/solution/MS88481
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ATTENTION - use the most up-to-date ADB Drivers otherwise will brick if older version is used; instead of downloading ADB elsewhere which is often old version, get it directly from GOOGLE, here =
https://dl.google.com/android/repository/platform-tools-latest-windows.zip
now you can proceed to unlock bootloader =
https://motorola-global-portal.custhelp.com/app/standalone/bootloader/unlock-your-device-a
TWRP
get the official TWRP here =
https://dl.twrp.me/beckham/
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ATTENTION - if you just want root access, then there's no need to install TWRP, just boot from the .img once using the latest version
use TWRP to make a backup of EFS partition before installing anything, store the backup files outside of the device
if you want custom ROMs or GSI, then you will need to install TWRP installer .zip into the recovery partition. To install the .zip, boot using a .img for example the 3.3.1-0, then use it to install the latest .zip version in the recovery partition. Unfortunately the only official installable version of TWRP that exists is bugged, and the TWRP developers haven't fixed it yet, go talk to them ask for some love, be respectful =
https://github.com/TeamWin/android_device_motorola_beckham/issues
Magisk
install Magisk using the new&correct method AKA "Boot Image Patching Method" to be able to install OTA later =
https://topjohnwu.github.io/Magisk/install.html#boot-image-patching
when OTA arrives, you may manually install it whilst retaining Magisk by carefully following these instructions =
https://topjohnwu.github.io/Magisk/tutorials.html#ota-installation
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ATTENTION - you won't be able to install stock OTAs if you use older method or if system partition is modified, be really careful to not alter the hash of the partitions