Latest Build Nougat:NPJS25.93-14-18 Tested on: All retail variants: XT1621, XT1622, XT1640, XT1641, XT1642, XT1643, XT1644
Latest Build Oreo: OPJ28.111-22 Tested on: All retail variants: XT1621, XT1622, XT1640, XT1641, XT1642, XT1643, XT1644
Note: Motorola doesn't allow downgrading so once u flash O via OTA/Fastboot it isn't recommended to go back to N or any older build than OPJ28.111-22 .
Stock N: ATHENE_NPJS25.93-14-18_cid50_subsidy-DEFAULT_regulatory-DEFAULT_CFC.xml.zip | Lollinet Mirror
Stock O: ATHENE_OPJ28.111-22_cid50_subsidy-DEFAULT_regulatory-DEFAULT_CFC.xml.zip | Lollinet Mirror
Note: If you're looking for a TWRP flashable version instead, please download that zip from the thread below, thanks to @Jleeblanch for providing this zip. Keep in mind that you can't take OTAs on this version as you'll be having TWRP and these zips don't upgrade your bootloader/gpt.
[ROM] TWRP Flashable Stock Firmware [7.0][8.1.0]
You must already have ADB and fastboot setup, check here if you haven't already as using adb/fastboot isn't within the scope of this thread.
How to Install ADB on Windows, macOS, and Linux
1. Download the file and extract the zip archive
2. Extract all the files to your fastboot folder. (Not needed if you have adb and fastboot added to the path, if you want to know how to do this, check this guide: How to Use ADB or Fastboot From Any Directory on your Windows/Linux PC)
3. Restart the device in fastboot/bootloader mode and connect to your PC.
4. Make sure the system detects the device in fastboot mode, to verify this your command window/terminal shows a serial number when you type:
NOTE: SKIP the oem lock begin and the oem lock commands if you dont want to lock your bootloader
Linux users will need to change the extension to .sh and add sudo before each command or directly run it as a root user .
To simply flash, run the "OEM Flash" file; to lock the bootloader, run "OEM Lock" file.
fastboot oem lock begin fastboot oem lock begin fastboot flash partition gpt.bin fastboot flash bootloader bootloader.img fastboot flash logo logo.bin fastboot flash boot boot.img fastboot flash recovery recovery.img fastboot flash dsp adspso.bin fastboot flash oem oem.img fastboot flash system system.img_sparsechunk.0 fastboot flash system system.img_sparsechunk.1 fastboot flash system system.img_sparsechunk.2 fastboot flash system system.img_sparsechunk.3 fastboot flash system system.img_sparsechunk.4 fastboot flash system system.img_sparsechunk.5 fastboot flash system system.img_sparsechunk.6 fastboot flash system system.img_sparsechunk.7 fastboot flash modem NON-HLOS.bin fastboot erase modemst1 fastboot erase modemst2 fastboot flash fsg fsg.mbn fastboot erase cache fastboot erase userdata fastboot erase customize (optional: will erase any customizations if ordered through motomaker) fastboot erase clogo (optional: will erase the custom boot logo if ordered through motomaker) fastboot oem lock fastboot reboot
Note: Many people have reported than flashing stock ROM after flashing a 64 bit Pie custom ROM leads to loss of IMEI. Just in case this happens to you, the fix has been made available by @Heeth21 . Also, some people suffer from having messed up Baseband, fingerprint detection or wrong IMEIs. Checkout both the threads here:
[Guide] [XT16XX] [Solve] Moto G4/Plus IMEI=0 issue.
[Guide] [XT16XX] [Solve] G4+ Baseband/Network/Volte issue, Lost 1 IMEI & fingerprint
For someone who has hardbricked his device , please refer to the following thread to get the raw bootloader and partition table and then flash the ROM as mentioned above.
[GUIDE] Moto G4 Plus HardBrick SOLVED - ULTIMATE UNBRICKING GUIDE
Motorola Mobility LLC