{% include alerts/tip.html content="For Windows users, we advise to use Git Bash. For more info about Downloads and Installation see [Official Documentation](https://git-scm.com/about)"%}
{% include alerts/danger.html content="The FP4 comes with an anti-rollback feature. Read the paragraph marked `Caution` in Requirements section of this guide, before proceeding." %}
1. Boot your FP4 in bootloader mode, and plug it to your computer
1. On your computer, download the zip file from the link provided above. Unzip the folder and browse into it
1. Flash /e/OS with the following commands:
>>
fastboot flash bluetooth_a bluetooth.img
fastboot flash bluetooth_b bluetooth.img
fastboot flash devcfg_a devcfg.img
fastboot flash devcfg_b devcfg.img
fastboot flash dsp_a dsp.img
fastboot flash dsp_b dsp.img
fastboot flash modem_a modem.img
fastboot flash modem_b modem.img
fastboot flash xbl_a xbl.img
fastboot flash xbl_b xbl.img
fastboot flash tz_a tz.img
fastboot flash tz_b tz.img
fastboot flash hyp_a hyp.img
fastboot flash hyp_b hyp.img
fastboot flash keymaster_a keymaster.img
fastboot flash keymaster_b keymaster.img
fastboot flash abl_a abl.img
fastboot flash abl_b abl.img
fastboot flash boot_a boot.img
fastboot flash boot_b boot.img
fastboot flash recovery_a recovery.img
fastboot flash recovery_b recovery.img
fastboot flash dtbo_a dtbo.img
fastboot flash dtbo_b dtbo.img
fastboot flash vbmeta_system_a vbmeta_system.img
fastboot flash vbmeta_system_b vbmeta_system.img
fastboot flash vbmeta_a vbmeta.img
fastboot flash vbmeta_b vbmeta.img
fastboot flash super super.img
fastboot flash aop_a aop.img
fastboot flash aop_b aop.img
fastboot flash featenabler_a featenabler.img
fastboot flash featenabler_b featenabler.img
fastboot flash imagefv_a imagefv.img
fastboot flash imagefv_b imagefv.img
fastboot flash multiimgoem_a multiimgoem.img
fastboot flash multiimgoem_b multiimgoem.img
fastboot flash qupfw_a qupfw.img
fastboot flash qupfw_b qupfw.img
fastboot flash uefisecapp_a uefisecapp.img
fastboot flash uefisecapp_b uefisecapp.img
fastboot flash xbl_config_a xbl_config.img
fastboot flash xbl_config_b xbl_config.img
fastboot flash core_nhlos_a core_nhlos.img
fastboot flash core_nhlos_b core_nhlos.img
fastboot erase userdata
fastboot erase metadata
fastboot --set-active=a
1. Unzip the archive
```
unzip <fileyoudownloaded>
```
> Replace `<fileyoudownloaded>` with the name of the archive file you downloaded.
> Alternately you can create a folder and unzip the archive there.
1. Confirm that extracted directory contains following content:
- `bin-linux-x86 directory` - which contains linux tools including fastboot and adb
- `bin-msys directory` - which contains Windows tools including fastboot and adb
- `img files` - The `img` files that are to be flashed onto the device.
- `flash_FP4_factory.sh` - The installer script.
1. Boot into bootloader/fastboot mode.
- Power OFF the device.
- While holding `Volume Down` button, plug in a USB Cable that's connected to a PC on the other end.
1. Run the installer script on Terminal(Linux) or on Git Bash UI(Windows).
- Make sure you are in the current directory which contains the `flash_FP4_factory.sh` file.
