Dirty Unicorns ROM for AT&T/T-Mobile Galaxy S3! [Android 5.1.1]


Looking for a fast and stable custom ROM based on Android 5.1.1 for your AT&T or T-Mobile Galaxy S3?

If so, check out the latest Dirty Unicorns ROM, which is an excellent custom ROM based on the latest Android 5.1.1 and brings you a high level of great customizations.  Camera works great out of the box (I recommend the Google Camera on Play Store so you get Panorama, Lens Blur, and PhotoSphere modes) along with excellent navigation customization where you can customize all of your buttons (including Home, Back, and Menu buttons with short, long, and double-press) or even disable them altogether and go with soft navigation buttons, which you can also customize with your favorite shortcuts.

Of course, that’s not all and you will be able to fully customize your status bar, add weather widgets on lockscreen/status bar, change LCD density, and much more.  All of these tweaks can be found under Dirty Tweaks in Settings.

For performance, you won’t get any better than this as Dirty Unicorns brings you all the performance improvements of Android 5.1.1 (30% faster than KitKat) and much much more.  Overall, this is an excellent custom ROM to get you up to speed with Android’s latest improvements along with custom options provided by open source ROM developers so definitely give this ROM a go this week(end) and do let me know what you think!


Download Dirty Tweaks ROM for AT&T Galaxy S3 SGH-i747 or T-Mobile SGH-T999

Download Android 5.1 Gapps(DO NOT USE older Gapps, you will FC!!!)

To install, reboot into recovery, make backup ROM, format /system, wipe data/factory reset, install ROM, install Gapps, and reboot.

If you have AT&T or Verizon S3 with locked bootloader (Android 4.3 or up) and using SafeStrap, YOU CANNOT INSTALL THIS ROM, SORRY!

First time installing a custom ROM? See How to Install Custom ROM on Galaxy S3!

Can’t find root?  See How to Enable Root on CM12.1!

Credits – XDA <— Please donate to the developers if you like this ROM,thx!

Extra MODs:


Q: My 3G/4G LTE data is not working!!!
A: See How to Fix 3G/4G LTE data by Manually Setting APN on Android!

Q: I have no Play Store!
A: Make sure you install Gapps zip file in TWRP or CWM Recovery!!!  Download link in this post above.

Q: I am getting Status 7 error in CWM/TWRP!
A: Sometimes, ROM developers put restrictions by accident, you can try this guide to get around it.

Q: I have no root access!
A: Missing root?  See How to Enable Root on CM12.1!

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26 Responses

  1. Llourd Zakus says:

    I tried flashing CM 12 and CM 12.1 on my SGH I 747 and everything seems to work perfectly except my Interenet data connection..I dont actually know of this Dirty CM 12.1 Rom whether it has the same problem or not because i saw the network BAR blank in the uploaded video above.So has anyone tried yet??

  2. ty says:

    im trying it now

  3. Brrownie says:

    Will it work on my rooted canadian bell I747M? If it does can you please add in your tut? for the noobs like me.. TIA

  4. Vince says:

    OK, So sorry to ask a stupid question but don’t want to brick my phone because I’ve done it before & it SUCKS……I’ve had this AT&T I747 for a while and rooted it along time ago but really didn’t do anything with it. I really want to upgrade to an awesome new rom but am currently on a 4.3 build, baseband version I747UCUEMJB….I’M NOT SURE IF I’M USING SAFESTRAP or NOT……Can I install THIS ROM & if NOT, which would be an awesome alternative?? Thanks Max for Ur help…….Vince from Cali…..

    • Vince says:

      OK, Nevermind…..I Figured it out……I wasn’t running a safestrap, didn’t need it I guess…lol…All is good, Thanks for the Awesome Rom…..:)

  5. Gen4sr says:

    I Have an Australian i9305 S111 LTE, do these roms work with the international versions? Definitely don’t want a brick.

  6. O says:

    Does this rom unlock free hotspot

  7. Alen says:

    I installed it and everything ran great on my i747. I did this because I bought this phone and when I put the sim card in I got a message “SIM network unlock PIN”. I thought maybe installing this rom would eliminate this but it didn’t. I tried purchasing the unlock code on ebay but for some reason it doesn’t work. Some one said it’s because I need to be in stock 4.1.1. Any truth to this??? I tried but since installing this rom I can’t seem to go back using odin or cwm. Can anyone give me advice???

  8. enufsed1221 says:

    Can anyone tell me how to go back to 4.1??? I’ve tried using Odin and it failed and using CWM and that got aborted. I need to go back to Unlock my I747. Any help please?

  9. Mukarram says:

    I installed this unicorn’s rom and i dunno why my headphone jack isnt working…..
    Pls find me a solution

  10. Seshu says:

    Hello, this ROM is fast and stable. Only issue is that it is dropping cell signal every 30 mins for brief period and restores back, did any one have this issue and what is the fix?

  11. Lyndon J. says:

    Hey I installed this ROM and it works perfect. Only thing is that my soft keys (back and home buttons ) vibrate but not light up. I can’t seem to fix it. Any suggestions?

  12. vijay says:

    Wow…..excellent ROM for S3 AT&T version. Everything works out box. Snaaapy……Snaaaapy.

    1. Still 1GB ram is left after installing OS + Apps. Total memory is 1.8GB RAM.
    2. No Lagging – Android 5.1.1 is awesome —–
    3. Dirty uniconrns – provides extra optimizations. All are good and appropriate.
    4. Camera is Good – no issues.

    Kudos to Dirty Unicorn team. I have tried CM 12.1 – but data was NOT working .This ROM resolved the issue.

  13. Alison says:

    After installing this rom I wasn’t able to connect to my camera and the flashlight wasn’t working.

  14. Murat says:

    Now i have this rom for my i747 but there is no signal in notification bar. But when someone calls me i can reply and i cant use my mobile data. How can i fix this

  15. dan says:

    come on man, cant read sim? really?

  16. Smile says:

    I was able to flash it without any problems, but I’m currently stuck on the animation logo of the DU. I don’t know if this is a BOOT LOOP, it takes time so much. like 30minutes and up. I did the the wipes as max did. Still im stuck on boot. any help? s3 sgh-i747 AT&T here.

    • Your Helper says:

      I had the same thing what I did was a wipe to install a new rom and then don’t download the latest ggappps coz the latest gapps causes the error is my guess stilll trying the older gapps and will tell what to do. 🙂

  17. mc says:

    I have the same problem, it never boots and I have tried clearing the cache and everything else usually suggested. Any other help?

    • Your Helper says:

      I had the same thing what I did was a wipe to install a new rom and then don’t download the latest ggappps coz the latest gapps causes the error is my guess stilll trying the older gapps and will tell what to do. 🙂

  18. BA says:

    Had a problem with mms texts after installing the DU ROM and recommended Gapps on ATT. It turned out that the problem was that the ATT LTE pta APN had the Authentication type set as “not set”. When I changed it to “none” as shown in the”How to Fix 3G/4G LTE Data by Manually Setting APN on Android”, the MMS texting started to work!

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