to do it, you have several options :
they are the same as for regular update…
.
(it is recommended to take a backup of your things in case)
.
download the file on the phone, go to “→ settings → system updater” and use the feature called “locale update” (if you have it in the “3 dot menu” at top right of the screen).
(not possible on device running android 9)
or
- download the file on the phone, reboot the phone into the recovery mode and use “apply update” then “from internal storage” (if your “recovery mode” have the feature).
or
- download the file on a SDcard, reboot the phone into the recovery mode and use “apply update” then “from External SDcard” (if your “recovery mode” have the feature).
or
- Universal Method, download the file on a computer, boot the phone into the recovery mode and use “apply update” then “from ADB” :