Rooting Nexus S

This is a discussion on Rooting Nexus S within the Nexus One Development & Hacking forums, part of the Nexus One category; Originally Posted by danger-rat In order to use recovery to flash/install non-official files for your phone (the su zip), you need a custom recovery. In ...

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Thread: Rooting Nexus S

  1. #11
    Junior Member usamaahmad's Avatar
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    Quote Originally Posted by danger-rat View Post
    In order to use recovery to flash/install non-official files for your phone (the su zip), you need a custom recovery. In order to install a custom recovery you need to be either rooted, or have an unlocked bootloader. That's why you are getting a signature verification error, because the file you are trying to flash is not Google software...
    But I thought I was running this su zip file to in fact root my phone?

    My goal is to gain access to files in the internal storage, something you can only do with root access (I believe). From what I understand then, I need to unlock my bootloader, use a custom recovery to flash the su zip, then that will help me to root my phone. Once my phone is rooted I can then use some sort of telnet program to edit the files I need to edit.

  2. #12
    Android Lurker danger-rat's Avatar
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    Typically, you either unlock the bootloader or use an exploit to root. Unfortunately, there are no exploits that work on Android 2.3.4 or higher. Unless you know of a way to revert your OS to an older version (which can be done on the N1 quite easily, but I don't know about the NS), then unlocking the bootloader is your only option.

    Also, unlocking the bootloader will wipe all user data from the phone. It's not as extreme as it sounds, because your emails and contacts etc are stored in the cloud, but you will lose your SMS messages, game scores, settings, etc, unless you can find a way to back them up. MyBackup Pro is pretty good, but it won't save everything...

  3. #13
    Android Lurker DudeRandom21's Avatar
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    Root access is rw access to system files so if you flash su you get root access then you can use a file manager to alter the files in the system that you wanted to alter.

  4. #14
    Junior Member usamaahmad's Avatar
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    alright, thanks for all your help everyone --

    It would have been far easier to pay the $600 to get the phone than to go through AT&T I guess. I'll think it over and then maybe try to unlock the bootloader and root so I can do what I am trying to do.

  5. #15
    Junior Member usamaahmad's Avatar
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    As an update, I was able to unlock the bootloader on my phone. Now I'm very carefully trying to find a compatible custom recovery that I can load onto the phone. I've been using the instructions linked to at the top of this very thread, so thank you again for that.

    Once I load the custom recovery, do I lose the standard Android recovery menu, or can I revert back to that once I've rooted my device?

  6. #16
    Android Lurker danger-rat's Avatar
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    Since your bootloader is now unlocked, you can revert back to a stock recovery any time you want. The custom recoveries are basically the stock recovery with a lot of extra features, so you're not missing anything by having a custom recovery, and you're gaining a lot...

    Which Nexus S do you have (model number)?

    Check your model number, then take a look at this thread (you can jump straight to part 3)...

  7. #17
    Junior Member usamaahmad's Avatar
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    Quote Originally Posted by danger-rat View Post
    Since your bootloader is now unlocked, you can revert back to a stock recovery any time you want. The custom recoveries are basically the stock recovery with a lot of extra features, so you're not missing anything by having a custom recovery, and you're gaining a lot...

    Which Nexus S do you have (model number)?

    Check your model number, then take a look at this thread (you can jump straight to part 3)...
    I have the Nexus S that's compatible with AT&T, the one that recently became available under contract. So I guess that is the i9020A, but this one has a black back (unlike the white one that came out off contract a few months ago). I bought my N1 off contract so I was accustomed to the "true" Android experience.

    With this phone I've found that AT&T is blocking Google Video chat over 3G, which I find annoying. I love stock Android, and I want to keep the phone as stock as possible, but I did want to change the settings in Talk to enable video over 3G.

  8. #18
    Junior Member usamaahmad's Avatar
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    Ok I guess I'm stuck at Step 3, which is installing a custom recovery.

    I've downloaded recovery-clockwork-4.0.0.2-crespo.img

    I try to use flashboot to do the "flashboot flash recovery <img name>" but I get the message "error: cannot load 'recovery-clockwork-4.0.0.2-crespo.img' "

    I've tried the images available here but I get the same message.

    Per this CyanogenMod wiki here, prior to installing the custom recovery I should see a white screen with three skating boards (step 3). However I see no such thing. I follow steps 1 and 2 but when I boot up in step 3 while holding the power up button I get taken to what I think is the bootloader menu, no white screen or skateboards.

  9. #19
    Android Lurker danger-rat's Avatar
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    In order to use fastboot, you need to be at the same screen that you were when you types "fastboot oem unlock"

  10. #20
    Junior Member usamaahmad's Avatar
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    Quote Originally Posted by danger-rat View Post
    In order to use fastboot, you need to be at the same screen that you were when you types "fastboot oem unlock"
    I am, I believe. I am in the platform-tools directory using ..\tools\flashboot.exe flash recovery <img name> .. I had to do this because otherwise I would get an error related to adb

    But I am using the flashboot command in the same as I did to unlock the bootloader.

    In fact if I try to unlock the bootloader again doing it this way I successfully get the message: FAILED (remote: Already Unlocked)

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