# NEXUS 5X: Fix lineage 14.1 OS vendor mismatch error (N2G47F)

Issue is due to the fact that lineage 14.1 bullhead nightlies are based on the 7.1.2 N2G47F (Apr 2017) monthly update from google. 

More explanations in [xda-developers](https://forum.xda-developers.com/nexus-5x/orig-development/rom-cm14-1-nexus-5x-bullhead-t3496798).

## PREREQUISITE

This assumes: 
- you already know a bit about flashing you android device and you already installed [TWRP](https://twrp.me/devices/lgnexus5x.html).
- you already have `adb` / `fastboot` installed and you know a bit about it
- you are on macOS (*I give some terminal command from macOS*)

## 1- Download `factory image` from `https://developers.google.com`

Download from official [Nexus 5x N2G47F image](https://dl.google.com/dl/android/aosp/bullhead-n2g47f-factory-f5d53a67.zip)

In case link is broken find it yourself:
- https://developers.google.com/android/images
- search `N2G47F` (*CTRL+F - CTRL+V*)

## 2- Check checksum is `f5d53a67662d1b4c2b2325813d823fc49ad9fb4a5b5361e91c3aff00157c1ddf`

In terminal, check downloaded zip checksum:

```bash 
`shasum -a 256 bullhead-n2g47f-factory-f5d53a67.zip
```
it should be: `f5d53a67662d1b4c2b2325813d823fc49ad9fb4a5b5361e91c3aff00157c1ddf  bullhead-n2g47f-factory-f5d53a67.zip`.

## 3- unzip `bullhead-n2g47f-factory-f5d53a67.zip`

Then enter extracted directory:

```bash
cd bullhead-n2g47f
```

## 4- unzip `bullhead-n2g47f/image-bullhead-n2g47f.zip`

Then enter extracted directory:

```bash
cd image-bullhead-n2g47f
```

## 5- copy `vendor.img` into your device

You can copy it to `sdcard`
- `Manually` 
  - with [`android file transfert`](https://www.android.com/filetransfer/)
- or by `adb`:
  ```bash
  adb push vendor.img /sdcard
  ```

## 6- reboot to bootloader

- `Manually` 
  - by holding buttons: `power + volume down`, 
- by `adb`:
  ```bash
  adb reboot bootloader
  ```

## 7- restart recovery

**In TWRP:**

install image: `vendor.img` as **vendor partition** (*check `vendor` when asked*)
  


# **Now reboot system and see it is fixed, no more alert.**

### Wait... what about bootloader and radio?

We just fixed the origin of the error message but your android is not fully updated.

Next steps will just take less than a minute.

For **radio** and **bootloader** we will use `fastboot` (as suggested in [xda-developers](https://forum.xda-developers.com/nexus-5x/orig-development/rom-cm14-1-nexus-5x-bullhead-t3496798)).

## 8- reboot to bootloader

- `Manually`
  - by holding buttons: `power + volume up + volume down`, 
- by `adb`:
  ```bash
  adb reboot bootloader
  ```

## 9- On you computer, cd within `image-bullhead-n2g47f` — extracted directory in *step 3* — directory:

```bash
cd image-bullhead-n2g47f
```

## 10- flash bootloader
You may be in the bootloader here before going on.

```
fastboot flash bootloader bootloader-bullhead-bhz11l.img
```

## 11- flash radio

```
fastboot flash radio radio-bullhead-m8994f-2.6.37.2.21.img
```

# Now you are done, your Nexus 5x is fully updated!