Motorola XT1540 (Moto G3)

Device Name: Moto G (3rd Generation)
Operating System ROM

  • Initial OS: Android 5.1.1 Lollipop
    • Name: “XT1540_OSPREY_RETUS_5.1.1_LPI23.72-65_cid9”
  • Updated OS: Android 6.0 Marshmallow
    • Name: “XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9”

Device Recovery

  • Enter Fastboot Mode
    • Power Off
    • Press and hold “Volume Down” while powering on
  • Connect USB cable to a computer
  • Open “File Explorer”
    • Unzip ADB Fastboot Firmware file
    • Unzip an OS ROM files to the same folder
  • Open “Command Prompt”
    • Navigate to the folder containing ADB & ROM files
    • Execute Fastboot commands supported by “ADB.exe”
      • fastboot devices
        • Verifies a connected device
      • fastboot oem unlock
        • unlocks bootloader for installation
      • 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 system system.img_sparsechunk.0
      • fastboot flash system system.img_sparsechunk.n
        • repeat up to sparsechunk.n
        • n=last available sparsechunk file
      • fastboot flash modem NON-HLOS.bin
      • fastboot erase modemst1
      • fastboot erase modemst2
      • fastboot flash fsg fsg.mbn
      • fastboot erase cache
      • fastboot erase userdata
      • fastboot oem lock
        • locks bootloader for OS start-up
      • fastboot reboot
    • Check device reboot
  • Disconnect USB cable from a computer

Device Bootloader Lock/Unlock

  • Enter Fastboot Mode
  • Check device screen for lock status
  • To unlock bootloader
    • Go to Motorola website and obtain unlock key
    • Go into fasboot mode
    • Execute Fastboot command with ADB.exe
      • fastboot oem unlock UNIQUE_KEY
    • Review device screen for status
  • To lock bootloader
    • Execute Fastboot command with ADB.exe
      • fastboot oem lock
    • Review device screen for status
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