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[Q] Where to download the oldest firmware for this phone

11th January 2014, 12:44 AM   |  #1  
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I am trying to downgrade an AT&T S4 so that i can factory unlock it.

I downloaded Samsung-Updates.com-SGH-I337-ATT-I337UCUAMDL-1367050591 from a couple different mirrors and they're all corrupt so I don't even know if this version works.

edit: I guess ..What's the latest firmware the *#0011# trick will work on?
Or is this even possible? It has UCUAMF3 installed
(And I have read up on MF3 and still don't understand if this is possible.)

Thanks in advance for any help! I have already been googling for a couple days.
Last edited by djphooka; 11th January 2014 at 01:27 AM. Reason: updated info
11th January 2014, 02:09 AM   |  #2  
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Quote:
Originally Posted by djphooka

I am trying to downgrade an AT&T S4 so that i can factory unlock it.

I downloaded Samsung-Updates.com-SGH-I337-ATT-I337UCUAMDL-1367050591 from a couple different mirrors and they're all corrupt so I don't even know if this version works.

edit: I guess ..What's the latest firmware the *#0011# trick will work on?
Or is this even possible? It has UCUAMF3 installed
(And I have read up on MF3 and still don't understand if this is possible.)

Thanks in advance for any help! I have already been googling for a couple days.



Did you try SamMobile?

http://www.sammobile.com/firmwares/1...e=ATT#firmware
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11th January 2014, 03:05 AM   |  #3  
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Not possible.....

Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app
11th January 2014, 03:08 AM   |  #4  
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Quote:
Originally Posted by xxtoxicravenxx

Not possible.....

Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app

Not possible to downgrade?
11th January 2014, 04:09 AM   |  #5  
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Quote:
Originally Posted by djphooka

Not possible to downgrade?

Sadly no. Once you update to MF3 or MK2, you are stuck on it.
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11th January 2014, 05:26 AM   |  #6  
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Damn. Ok. Guess my friend is SOL. .

Sent from my SGH-M919 using xda app-developers app
11th January 2014, 12:24 PM   |  #7  
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It will brick it. Then if your on mk2 it will be a fight to repair. If your on mf3, it's not so hard, you can odin back. This phones bootloader is locked. So no downgrading.

Sent from my SAMSUNG-SGH-I337 using xda app-developers app

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