Can i downgrade my SPH-L720T from OK3. - Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot

So the thing is i want to downgrade to any other sim-unlockable version and i don't know what to do. ( i am on a 7.1 custom Rom )
Help please
Thanks

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Lost with E300L.. please help

hey guys... i have a E300L. it is currently running stock rom rooted with cofface recovery v3 installed. Baseband version: E300LKLUAMF2 and Build No: JDQ39.E300LKLUAMG2.
I want to know whether this is the latest build and baseband for my version of S4. and if not than someone kindly give me the link to the newest firmware and the procedure to flash the firmware.
i have also read about the MF4 advanced stock rom in the korean website. i need the download link. need to know the prerequisites to flash this rom and the procedures
any help will be highly apprecitaed
any E300L user for help???

[Q] ¿ Official 2.3.4 StockRom Download?

Hello im new in this forum , the problem is the next :
I cant make a NANDROID Backup (Root Problem ), i need to downgrade to the 2.2 froyo to root it , but i want the stock rom 2.3.4 official for my touch 4g glacier to be safe and do the downgrade : but the problem is... i cant find the stock rom , if anybody have the official stockrom, please help me

Help beginner

I wanted to ask how to get back to stock firmware of my s4 4.4.2 after installing a lollipop Rom ???
http://forum.xda-developers.com/galaxy-s4/general/i9505-downgrade-5-0-lollipop-to-4-4-2-t3052472
Thanks, but coming from a Rom modified the procedure and the same ??? or just flash another rom ????

downgrade from 6.0 to 5.1.1(important )

Hey guys. I want to know how I can downgrade from 6.0 mm to 5.1.1 lollipop official of course. I have n910c note 4.. I know it is not easy. . But If someone knows the steps please tell me. Can I do this from odin with the same way as 6.0 flashing? I mean which way I must follow? Please replyy
Same as upgrading just use Odin to downgrade.
Don't you have to unlock the bootloader in order to downgrade from Marshmallow to Lollipop?
yeah i think the same Dark.. when i try to downgrade with s6 from 6.0 to lollipop then some error appears.. it is not easy.. Someone who knows the steps please tell me.

I have upgraded my phone(sm g935a)to Oreo i want to downgrade it

Kindly guide me someone i want to downgrade to marshmallow on SM G935A .. i have tried the apk1 rom but failed to flash please help...
You'll get used to Oreo, it's pretty good so far.
Assuming it's still on bootloader 4, you can downgrade to any firmware build using BL4. I don't recall off the top of my head if there was ever a MM build that used BL4, but that's the restriction. Anything else will either not flash or brick your device. You will need a modded version of ODIN to do the downgrade.
why do you want to downgrade?

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