How To: UnRoot Your MyTouch 3G/MyTouch 1.2 MyTouch and Get Back to Cupcake (Updated 04.19.10)

UPDATE: THIS NOW WORKS ON THE MYTOUCH 1.2 (THE MYTOUCH WITH THE 3.5MM HEADPHONE JACK AT THE TOP) AND THE OLD MYTOUCH AS WELL.

1. Download the correct .nbh file for your device and rename it to sappimg.nbh if necessary (make sure it is sappimg.nbh and NOT sappimg.nbh.nbh or anything else)

NBH File (Works for the Old MyTouch)

Zip File (Works for the new MyTouch w/ 3.5mm headphone jack) RENAME IT TO sappimg.zip (not sappimg.zip.zip, just sappimg and its a .zip file!) Thanks Caesar for sending this in!

2. Save the sappimg.nbh/sappimg.zip file to your SD card. As always, do not place it in any folder on the SD card, just on the SD card.

3. Put the SD card into the phone and turn the phone on by holding down Volume Down and Power.

4. Push the trackball down on that screen and wait for it to pick up the Sappimg.nbh.

5. Push the trackball to begin, it should automatically update from there.

6. Once the flashing is fully complete, reboot the phone. DONE!

Reported Issues

Issue: Phone says that the wrong Main Version is Older or Wrong Model ID…

Solution: Use our Goldcard Method instead.

If this procedure helped you, please consider donating to the original developer or at least sending them a thank you.

Now that you are rooted, head here to learn some of the fun things you can do!

For all the devices we have rooting procedures for, head here.


Something Wrong? If you notice an issue with the procedure (broken link, steps out of date, etc.), use this form to let us know! Otherwise, if you just are having trouble with the procedure, reach out to us on Twitter, Facebook, or Google+.

  • Posaunsger

    My phone says “No image or wrong image”.
    Is there a way to use the goldcard-method even if my phone is unbootable?
    Anyway, what do you recommend to do if my phone is unbootable?
    I would really appreciate it if my phone worked again…thank you.
    Rafael

  • tom

    does this work for the fender edition ?

    • Rahulkarthic_82

      I was able to downgrade to 1.6 and it (mytouch 3g) is very fast now. But, some how i lost some of my contacts after the downgrade… Can any one help me with that pleaseeee….

      i had about 200 contacts and now i have only 97 of them.. i do n’t know what happened to the rest of them… I check my gmail account –> contacts. I can see the 97 contacts on my phone in the gmail account. The ones I lost are the ones i added like with in 9 months before now..

  • Rahulkarthic_82

    I was able to downgrade to 1.6 and it (mytouch 3g) is very fast now. But, some how i lost some of my contacts after the downgrade… Can any one help me with that pleaseeee….

    i had about 200 contacts and now i have only 97 of them.. i do n’t know what happened to the rest of them… I check my gmail account –> contacts. I can see the 97 contacts on my phone in the gmail account. The ones I lost are the ones i added like with in 9 months before now..

  • Jcc2150

    for some reason before i screwed up my phone, the model # said G1. cbr43? but my phone is a mytouch! how can i fix this back to the real model #????

  • Shakeera Alston

    I followed it to the T and at the end when hope shines It says “model Id incorrect” And i cant goldcard it adb on my comp is funny plus the site for goldcard img is down. please help! 

  • JJ

    I couldn’t take the sluggishness of the 2.2 update any longer.  I used this method to go back to 1.5 and OMG what a difference.  I had forgotten how fast the phone was before Froyo.  Thank you so much guys.

  • Claudia32605

    im having the exact same problem!!! did u find a solution??

  • Smurf Kb

     have a mytouch 3g 1.2 with the old radio and SPL, i acidently bricked it trying to flash the new radio and SPL and now i cant get into recovery or fastboot and the flash screen is frozen, pleassssssee help me get this fixed it has been completel useless for the last week or so

    • Jcc2150

      did you do a backup before you flashed? nandroid? if so you should be able to restore. if not press home+power, once you see triangle “!” press home+power again, you will see the stock android restore, there you can flash a stock img.

  • Slawek

    for the ZIP file go here…. as the other ling on the top doesn’t work  waited for a while and nothing happened.    http://www.filesonic.com/file/1903956781/SAPPIMG_Sapphire_T-Mobile_US_2.10.531.4_release_signed.zip

  • Jeromeleva13

    is this working

  • Jeromeleva13

    it works on mine.. but how can i set up my google account without wifi..?

  • LovesDonut

    I did this with my MyTouch phone (without the headphone jack) and it is WONDERFUL. It sent my phone back into the past with the Cupcake operating system. It then asked me if I wanted to upgrade to Donut (1.6), which I did. Now it asks me all the time if I want to update to Froyo (2.2), so I just keep saying no. Maybe I will find a way to make it stop asking me if I want to update to Froyo, but I’m not worried about that right now. I’m just so glad to have my phone back! I had all of the problems that everybody else seemed to have: apps wouldn’t load, would load r e a l l y slowly, $85 a month paperweight, and etc. While it’s a drag that I don’t have the functionality of Froyo, I’m just really glad to have a phone that actually works. Now I can use this phone for the next few months until my contract runs out, at which point I will say GOODBYE to HTC and GOODBYE to Android unless I receive some kind of written apology from them for being so awful. What a joke to have to reload all of my apps and have to go back to using an old operating system because of their much-hyped, but ultimately very flawed hardware. 

  • Anonymous

    My phone (myTouch 3G 3.5mm) wouldn’t boot to the home screen. It would go as far as Android and stall. If I played with the keys it would go to set up wizard, but it wouldn’t work it.

    I connected to my desktop via the USB and downloaded sappimg.zip directly to the SD card. After following the rest of the directions as posted above I regained control of the device.

    Many thanks to theunlockr and to David C who posted the instructions.

    Any suggestions for a new ROM?

  • Salesbyashley

    I just tried it on my mytouch 3g, everything appeared to go good, it did the reboot but it STILL says it has 2.2.1… PLEASE HELP IT IS SOOOO SLOW!! email me if you can help salesbyasley@gmail.com

  • Bboiye

    Thank you for posting this, saved my skin :D

  • Vegas_gz

    The zip file is no longer available through the link for the old mytouch.  Does anyone know where to find it?

  • Adeel

    I DID THIS STEP 100% AND I GOT SUCCESSFUL BUT CAN YOU TELL ME NOW I AM RUNNING WITH UNROOT AND WHEN I GO IN SYSTEM UPDATE FROM SETTINGS THERE IS AN UPDATE AVAILABLE FOR ANDROID 2.2.1 CAN I UPDATE IT FROM THERE ?

  • Manmanw

    Because of what happened to Megaupload, you might want to re-upload this file in case you have it.