OTA Updater

OTA Updater is the internal system update app developed by FIH Mobile, and the package name is.

It exists in all of Nokia phones targeted to Chinese market, and partial older builds of Global market.

The system update server on Google is inaccessible in China, so a Chinese OTA server is mandatory.

A variation of OTA Updater also exists in Sharp Aquos S2 and Sharp Aquos S3, with customized UI but identical functionality.

Comparing to sideload via recovery, it will bypass the device project codename check and can help you ttserve root by Magisk during update.

Manual Update
There's a handy command to activate OTA Updater app - *#*#874#*#*.

To use it, you have to place a suitable update file at root directory of internal storage, then you can dial the number to start update.

Filename Requirement
Filename must meet this requirement:

Full OTA Filename: [FIH_Build_Version]-update.zip

e.g. NB1-488B-0-00WW-B04-update.zip

Incremental OTA Filename: [FIH_Project_Code]-[Build_Version_After_Update]-[Build_Version_Before_Update]-update.zip

e.g. AOP- 513D-0-00WW-B03 - 427G-0-00WW-B01 -update.zip

If the update file doesn't exist, it will prompt "File not found" when using manual update command.

Global release
It used to exist in many of HMD Nokia Android phones at Android 8.1 build. But since including such manual updater might be useless for Global users, it got gradually removed on Android 9. However, add it back via Magisk Modules is possible.