downgrade - AT&T Samsung Galaxy S6

Hey guys i just updated my att gs6 from 5.0.2 to 5.1.1 via odin. Anyway i can downgrade back to 5.1.1? Thx.

Unfortunately no, I wish there was a way because I want to root my phone.
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G900A root Lollipop

Hey there,
I have read through tons of threads and google searches but I can't seem to find a straight answer with a guide. I just got an S5 G900A (AT&T) Preloaded with 5.0 Lolipop. I'm wanting to know is there a way to root the phone without tripping Knox?
I currently use an S3 with 4.1.1 that does what I need, All I'm wanting to be able to do to the S5 is load FoxFi & Titanium Backup to use as a hotspot and remove bloatware, I'm still within my 2 weeks if the phone is unable to be rooted I really have no need for it and able to return at this moment as It has only been powered on to check.
Thanks
No way to root 5.0 on the S5 at this point. I seriously doubt a method will come out before your return period. If root is that important to you, return it.
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Have you found a way yet?
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Any new information?
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Android devices can't be rooted????

I have an updated galaxy s5 lollipop for at&t us there any way for me to root this? ??
AnyTizers said:
I have an updated galaxy s5 lollipop for at&t us there any way for me to root this? ??
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I would love to know this as well. Can't find anything for Samsung-SM-G900A Baseband BOC4
EDIT: After reading through a lot of threads I found that there is currently NO DOWNGRADE OR ROOTING METHOD for those on stock OTA 5.0 Lollipop. This for AT&T SM-G900A Baseband OC4.
The s5 on lollipop is completely unrootable
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Has to be on 4.4.2
Check with your carrier, they may provide the previous version. I.E. Downgrade. If on original carrier that is.
Now if I did a warranty exchange will it be pre loaded wit oc4 or of4 because I'm hoping not. What are my chances.
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Extra slim to none, it'll most likely have most current firmware.
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Best root option 4.4.4 OA2?

Good day all,
Just got myself an AT&T Galaxy s5 for use on the cricket network.
Android: 4.4.4
Baseband: G900AUCU2AOA2
Kernel: 3.4.0-3116194
I've already tried towelroot and kingo rooting both of which failed.
What's my best option to get root / custom recovery?
http://forum.xda-developers.com/att...to-root-g900aucu2aoa1-4-4-4-2-3-2015-t3021120
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Will that work with oa2 (newer than oa1)?
Should work as long as you don't take a 5.x update from ATT.
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Thanks shakatu The rooting was successful!
how did you get it to work? i an on 4.4.4 oa2 and when i downloaded tower root, just says my device is not compatible
You have to Odin back to the 4.4.2 that towelroot works on. It's in the thread above and it does work.

Need help to downgrade from 5.1.1 to 5.0

My client just bought for me a SM-900A with Android 5.1.1 (LMY47X.G900AUCU4COI5). I'm using it for application testing, so I currently need to downgrade it from 5.1.1 to 5.0. I did search the stock firmware but could not find anything except the file G900AUCU3BOC4_OneClick.exe. I just gave it a try but it failed.
Is there any way to downgrade to 5.0?
I would appreciate your help. Thank you very much
I need the same to downgrade and then after to upgrade to PA1. i'm on stock OI5 and nobody have the OI5 to PA1 update file, but yes the OF3 to PA1.
Regards!
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quantan said:
My client just bought for me a SM-900A with Android 5.1.1 (LMY47X.G900AUCU4COI5). I'm using it for application testing, so I currently need to downgrade it from 5.1.1 to 5.0. I did search the stock firmware but could not find anything except the file G900AUCU3BOC4_OneClick.exe. I just gave it a try but it failed.
Is there any way to downgrade to 5.0?
I would appreciate your help. Thank you very much
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There is no way to downgrade from 5.1,1 you had to have oa1 bootloader or below .
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Brick for error after downgrade

Hello
After downgrade lollipop to kitKat 4.4.4 in my Motorola droid turbo Verizon 64G two days later installed for error an update OTA. Now my cellphone is dead.
No chargin
No start ON
Actually have unlocked bootloader.
I'm worried ?
Sorry for my bad English
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yehison said:
Hello
Now my cellphone is dead.
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Have you tried this? Maybe it will help.
Thanks
Now I have hope
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Only appears my device Qualcomm
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After use these guide Now I have a good brick .
http://forum.xda-developers.com/showthread.php?t=3139811
Somebody have solution for that
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Another picture
are you flashing files for 4.4? If you were on 5.1 then you should try files for 5.1.
And forget about 4.4. for now. You need to flash 5.1 and only after your phone will boot, then look for guide to downgrade.
you many need to flash the stock recovery (from 5.1) first, as your bootloader appears to be LOCKED now. after then, try flashing the stock 5.1 files. if successful, then you can unlock again via sunshine, flash TWRP recovery, then try to upgrade to 6.0. I'm pretty certain you should not try to downgrade, as that tends to cause problems.
Thanks
Just I'm downloading 5.1
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