How To: Root Your Phone From Stock FRF91

This is a discussion on How To: Root Your Phone From Stock FRF91 within the Nexus One FAQ & How-To's forums, part of the Nexus One category; Originally Posted by pc_michael Originally Posted by zyb5000 I have a never before rooted FRF91 and this doesn't work. You need to have your phone ...

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Thread: How To: Root Your Phone From Stock FRF91

  1. #11
    Junior Member zyb5000's Avatar
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    Quote Originally Posted by pc_michael View Post
    Quote Originally Posted by zyb5000 View Post
    I have a never before rooted FRF91 and this doesn't work. You need to have your phone rooted in order to complete step 2.


    Pre-Requirements :
    - unlocked bootloader : How to unlock the bootloader.
    - root access : Modaco's superboot.
    Did you actually try it? I noticed the Superboot requirement on that page as well, but I tried it anyway and it went through with no problem for me.
    Ya. I tried it. I ran into the problem I posted above. I can't boot in Amon RA recovery. There is now way to boot into it with out removing the file

    /system/etc/install-recovery.sh

    which I can't do because you need su to remove it.

    If you already did not have the file because you previously removed it or whatever reason then you should be fine. But since this is my first time unlocking my phone and attempting to root it I ran into this problem.

  2. #12
    Junior Member pc_michael's Avatar
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    Huh! Guess I lucked out, I followed those directions and had no trouble, never attempting to root before that.

  3. #13
    Junior Member chetanthaker's Avatar
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    Ok, so I took the leap of faith on my stock FRF91 N1 (NEVER rooted before) and tried rooting it and flashing a custom ROM. Honestly, it was a scary experience, but at the end of it all, I was worrying over nothing (as long as you follow the steps)

    Have this page open at all time and follow AS-IS and you should get root on your FRF91

    Here's the steps:
    1. Enable USB Debugging from Settings > Applications > Development on your phone

    2. Install NexusOne USB Drivers on your PC for your correct OS version
    How To: Set Up ADB/USB Drivers for Android Devices | TheUnlockr

    3. Download the Android SDK here

    4. Unzip the SDK to the root of C: - You do not need to run any setup, etc. Just the extract should be fine.

    5. Reboot machine to make sure the drivers are installed (Not really necessary, but fastboot.exe did not find my device without the restart)

    6. After reboot, open CMD and go to C:\AndroidSDK\Tools folder
    type:
    adb devices

    You should expect the following text:

    C:\android-sdk-windows\tools>adb devices
    * daemon not running. starting it now *
    * daemon started successfully *
    List of devices attached
    HT0xxxxxxxx device (Your device ID - does not necessarily have to start with HT0)

    7. Follow the Fastboot from here. You can copy those 3 files mentioned in the link to your fastboot folder. I copied those 3 files to my AndroidSDK\Tools\ folder - Does not matter

    8. Get the Cyanogen Mod, Google Addon, Amon_RA recovery from Full Update Guide - Nexus One Firmware to CyanogenMod - CyanogenMod Wiki

    9. Leave Cyanogen Mod and Google Addon to the root of the SD Card

    10. DO NOT copy the Recovery Image or Radio (if you are using FRF91 stock, you don't really need to worry about this) on the SD card

    11. Open CMD, go to the Android\Tools\ folder (where you copied those 3 files) and type:
    fastboot oem unlock

    12. You should get a warning - Accept it and your bootloader will be unlocked. All data will be wiped.

    13. Then flash the recovery (I flashed the regular Amon_RA recovery instead of Cyanogen recovery - Just a matter of choice or being safe when doing the first time)

    14. Flash Cyanogen with the instructions AS-IS - DO NOT DEVIATE if you are doing this for the first time

    If you followed it step-by step, it should work (worked on my never-rooted stock FRF91 N1)

  4. #14
    Member joelft's Avatar
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    1. can you "unroot" it?

    2. could it mess up my phone?

  5. #15
    Junior Member pc_michael's Avatar
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    You can unroot it. However, part of the rooting process includes unlocking your bootloader, which cannot be undone. However this doesn't affect how your phone operates anyway.

    If you don't follow the steps it is possible to mess something up, but it's nothing a factory restore wouldn't fix.

  6. #16
    Junior Member enforcerman's Avatar
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    Quote Originally Posted by chetanthaker View Post
    Ok, so I took the leap of faith on my stock FRF91 N1 (NEVER rooted before) and tried rooting it and flashing a custom ROM. Honestly, it was a scary experience, but at the end of it all, I was worrying over nothing (as long as you follow the steps)

    Have this page open at all time and follow AS-IS and you should get root on your FRF91

    Here's the steps:
    1. Enable USB Debugging from Settings > Applications > Development on your phone

    2. Install NexusOne USB Drivers on your PC for your correct OS version
    How To: Set Up ADB/USB Drivers for Android Devices | TheUnlockr

    3. Download the Android SDK here

    4. Unzip the SDK to the root of C: - You do not need to run any setup, etc. Just the extract should be fine.

    5. Reboot machine to make sure the drivers are installed (Not really necessary, but fastboot.exe did not find my device without the restart)

    6. After reboot, open CMD and go to C:\AndroidSDK\Tools folder
    type:
    adb devices

    You should expect the following text:

    C:\android-sdk-windows\tools>adb devices
    * daemon not running. starting it now *
    * daemon started successfully *
    List of devices attached
    HT0xxxxxxxx device (Your device ID - does not necessarily have to start with HT0)

    7. Follow the Fastboot from here. You can copy those 3 files mentioned in the link to your fastboot folder. I copied those 3 files to my AndroidSDK\Tools\ folder - Does not matter

    8. Get the Cyanogen Mod, Google Addon, Amon_RA recovery from Full Update Guide - Nexus One Firmware to CyanogenMod - CyanogenMod Wiki

    9. Leave Cyanogen Mod and Google Addon to the root of the SD Card

    10. DO NOT copy the Recovery Image or Radio (if you are using FRF91 stock, you don't really need to worry about this) on the SD card

    11. Open CMD, go to the Android\Tools\ folder (where you copied those 3 files) and type:
    fastboot oem unlock

    12. You should get a warning - Accept it and your bootloader will be unlocked. All data will be wiped.

    13. Then flash the recovery (I flashed the regular Amon_RA recovery instead of Cyanogen recovery - Just a matter of choice or being safe when doing the first time)

    14. Flash Cyanogen with the instructions AS-IS - DO NOT DEVIATE if you are doing this for the first time

    If you followed it step-by step, it should work (worked on my never-rooted stock FRF91 N1)
    Hey man. Thanks for posting these steps of what worked for you. I've been reading thru it and the links to make sure I understand it before i root. Just got my N1 FRF91 a couple days ago.

    I'm confused about one part: in step 8 you say to download Amon_Ra's Recovery Image... but then in step 10 you say NOT to copy it to the sdcard. Then I think you flashed to Amon_Ra Recovery in step 13...

    Can you expand on this a little bit.
    What I'm thinking is that we dont necessarily have to use Amon_Ra's Recovery image, but instead we can go straight to flashing cyanogenmod?
    Sorry if this is a noob question.

  7. #17
    Member joelft's Avatar
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    Of course the very first step doesn't work.
    Attached Images Attached Images  

  8. #18
    Junior Member chetanthaker's Avatar
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    Quote Originally Posted by joelft View Post
    Of course the very first step doesn't work.
    I had copied Fastboot in my AndroidSDK\tools folder. You can't go wrong with that with missing files. Try that.

    You need to have the following files where fastboot is located:
    1. ddms.bat
    2. AdbWinApi.dll
    3. adb.exe

    You should not run into trouble otherwise.
    Also recommended to use the command prompt explicitly since you need to provide parameters to the fastboot executable

  9. #19
    Junior Member chetanthaker's Avatar
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    [quote=enforcerman;67020]
    Quote Originally Posted by chetanthaker View Post
    Hey man. Thanks for posting these steps of what worked for you. I've been reading thru it and the links to make sure I understand it before i root. Just got my N1 FRF91 a couple days ago.

    I'm confused about one part: in step 8 you say to download Amon_Ra's Recovery Image... but then in step 10 you say NOT to copy it to the sdcard. Then I think you flashed to Amon_Ra Recovery in step 13...

    Can you expand on this a little bit.
    What I'm thinking is that we dont necessarily have to use Amon_Ra's Recovery image, but instead we can go straight to flashing cyanogenmod?
    Sorry if this is a noob question.
    Recovery.img (you got to rename the Amon_RA recovery image file to this) should be placed in the folder where you have the fastboot/adb installed (I had copied fastboot and all the necessary files to AndroidSDK\tools folder where I have everything in once place.

    You have to flash the recovery using fastboot executable from the command prompt on your computer.
    I doubt you can flash Cyanogen without having flashed a custom recovery. That's a primary pre-requisite. I might be wrong though.

    After unlocking the bootloader make sure you wipe your device - People have reported endless boot sequences and never being able to get their phones to start.

    Let me know if it works

  10. #20
    Member joelft's Avatar
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    Full Update Guide - Nexus One - CyanogenMod Wiki

    it says "Place the radio update.zip file on the root of your SD card." could someone explain that to me? ive unlocked my bootloader and dont want to waste my warranty!

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