1. 일단FireOS 최신은 4.6.1 (AT&T 4.6.1은 빌드가 더 구형이고 AT&T통신사 어플이 있다고 하니 이걸 이용하지 않도록 합니다.)을 다운로드 합니다.

 1) 이 링크를 이용  https://mega.co.nz/#!8lkhjQRS!XX8Ev0...L-iIqU_T3k9ah0

 2) 본 블로그 첨부파일을 이용

2. 밑에 How to Update Fire Phone to fireOS 4.6.1을 참고해 최신 버전으로 업그레이드 합니다.

  정리하면..

 1) 다운로드 받은 파일을 압축해제 후 FirePhone의 /sdcard 에 넣기

 2) Wifi와 Mobile Data를 끄기

 3) Device -> Install Update를 이용해 업데이트

3. Google Play Store가 깔려야 활용이 무궁하지요. 설치법은..

 1) 4.6.1용  play store apks 다운로드(링크를 이용하거 본 블로그 첨부파일 이용)

https://mega.co.nz/#!u15HQbCB!kb72acWFWIMIM1sBStNFnBSFJ7SwOdU_e5g0KTMNjps

 2) 아래 유트부 참고 설치

2. Put file you download on:
/sdcard



3. Go to wifi and disable



4. Go to Disable Mobile data.


5. Device->Install Updates.


6. Click on Update.

Now I have FireOS 4.6.1 Installed


Antutu Test:
After I install and check if have any new app, for example custom app from the carrier (O2), I dont see anything!! I see a clean room, without carrier apps.

the languages avaliable on this rom are:
1. Deutsch (Deutschland)
2. English (United Kingdom)
3. English (United States)
4. Español (España)
5. Español (Estados Unidos)
6. Français
7. Italian



Google Apps are working fine, I list apps I test with this update:

Google Play Store, Work Fine
Gmail, Work Fine
Youtube, Work Fine
Google Maps, Work Fine (No problem with labels).
Google Camera, Work Fine
Google Now, Work Fine
Google Launcher Work Fine (Widgets Included)
Google Earth, Work Fine
Google Drive, Work Fine
Google Doc Viewer, Work Fine
Google Hangouts, Work Fine
Google Hangouts Dialer, Work Fine
Google MyBusiness, Work Fine
Google Analitycs, Work Fine
Google CardBoard, Work Fine
Google Calendar, Work Fine
Google Translator, Work Fine


This the only app not work on my test:
Google Adwords, Start fine on the start, ask to agree, and the close, I try to start again, show Adwords Logo and close again.. (I need this on my Job, if anybody can helpme on this, thanks a lot).

Other Apps I test:
Teamviewer QuickSupport, Work fine only for chat, see wifi, See Aplications and Unistall, Process, Configuration and Registry of system, and Get manual capture screen. But not for control the phone.

Teamviewer for Remote Control, Work Fine.
ScreenConnect, Work Fine for Remote Control
ScreenConnect, Work only for Manual Capture and chat.
Nova launcher, Work, but the widget not work fine.
Terminal, Work Fine
VLC
Waze
Whatsapp, Work FIne (Include Calls)
Wifi Analyzer
TuneIn Radio

I hope this small list help you.