Downgrade Stock OI5 to OF2 - AT&T Samsung Galaxy S 5

Hello
I have OI5 stock. I want to downgrade to OF2 and then upgrade to PA1 through the method below. Anyone know if it's possible?
Thank you.
(http://forum.xda-developers.com/showpost.php?p=65833865&postcount=125)
ps:Exist OF3? On the website of AT & T only has OF2!

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Can the new OC4 be downgraded to a older version of lollipop?

I got a g900a on OC4 the newest update, is it possible to downgrade it back to one of the earlier versions of lollipop? Sammobile does not have any of the earlier files, anyone know where i can get it?
truwrxtacy said:
I got a g900a on OC4 the newest update, is it possible to downgrade it back to one of the earlier versions of lollipop? Sammobile does not have any of the earlier files, anyone know where i can get it?
Click to expand...
Click to collapse
No, unfortunately there is no way to downgrade.

of3 to oce

Hello everyone, this is my first post where I am needing some help. I have a S6, g920aucu2aof3 and would like to know can I goto OCE. I am trying to get root so I can do a few mods with the octo box. Thanks
No, you can't. Gotta wait for a new root method.
Sent from my SAMSUNG-SM-G920A using Tapatalk
u can go i am the one who tried it what u have to do is after flashing the oce firmware ur baseband will get unknown then u have to flash modem files from of3 then ur baseband will come back then u can do the pingpong root sorry for my bad english
jinishpv said:
u can go i am the one who tried it what u have to do is after flashing the oce firmware ur baseband will get unknown then u have to flash modem files from of3 then ur baseband will come back then u can do the pingpong root sorry for my bad english
Click to expand...
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Are you saying you successfully downgraded from unrooted OF3 and were then able to achieve root? This is pretty important information for a bunch of people here. Have you posted about it before? Link?
Sent from my SAMSUNG-SM-G920A using Tapatalk
yes i have sucessfully dowgraded from of4 and of3 to oe2 to achive root, what i normally do is if i am on OF4 firmware i flash OE2 full firmware through odin except i will load OF4 modem on the cp(modem) box and flash it , like if iam on OE3 firmware i flash OE2 full firmware through odin except i will load OF3 modem on the cp(modem) box and flash it
jinishpv said:
yes i have sucessfully dowgraded from of4 and of3 to oe2 to achive root, what i normally do is if i am on OF4 firmware i flash OE2 full firmware through odin except i will load OF4 modem on the cp(modem) box and flash it , like if iam on OE3 firmware i flash OE2 full firmware through odin except i will load OF3 modem on the cp(modem) box and flash it
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Could you elaborate on this for a newbie? Alot of us are trying to root our OF3 S6's.
Kolmain said:
Could you elaborate on this for a newbie? Alot of us are trying to root our OF3 S6's.
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Same here. Wondering if it is truly as simple as a couple Odin flashes as you suggest.
Basically, you say flash full OE2 firmware, then follow by OF4 modem only, then root as if OE2?
Sent from my SM-N910P using Tapatalk
Just tried it but odin fails at boot.img

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This fixed my issue I was having from 5.1.1 trying to downgrade to 4.4.2
http://forum.xda-developers.com/and...k-att-samsung-galaxy-s5-t3285300#post64922238
Follow it as it unbricked my phone flash all files with odin

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I cant update OTA as I'm not on ATT or in America at all. Phone is currently on 5.1.1 baseband ver OI2. I would like to update to marshmallow, can I go to OJ9 and then PD6 as described here in this method under 'Installation instructions'?
I would really appreciate any help or advice you can give me, so thanks. One a side not I heard somewhere the newest update is blocking use of the phones outside the US, anything in that? Thanks again.
Hi you!
You need to update to G925AUCU3BOJ9 via Odin method then you can update to G925AUCS5DPJ1 (6.0.1) via Odin too.

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