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G986U and G986U1 Firmware Links and Flashing Discussion Here

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Droid9684

Senior Member
May 9, 2011
496
38

rsaenz99

Member
Oct 14, 2021
5
1
Honduras
Hello!

im new here, any help/advice will be hot :)


got samsung s20+ 5g with "SM-G986U" and it is UNLOCKED to carries
but is stuck with android 10 (nov2020 update) and will like to upgrade to android 11

OTA says "your software is up to date" since i live in central america and the device comes from the USA

searching the forus i think the CSC of my device is SPR - "Spring"

can please confirme for me this is true? by watching the screenshot in

/Settings/About Phone/Software information

and if not much trouble...links to the appropriate firmware...please?

any help/support thanks in advance
 

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Droid9684

Senior Member
May 9, 2011
496
38
Hello!

im new here, any help/advice will be hot :)


got samsung s20+ 5g with "SM-G986U" and it is UNLOCKED to carries
but is stuck with android 10 (nov2020 update) and will like to upgrade to android 11

OTA says "your software is up to date" since i live in central america and the device comes from the USA

searching the forus i think the CSC of my device is SPR - "Spring"

can please confirme for me this is true? by watching the screenshot in

/Settings/About Phone/Software information

and if not much trouble...links to the appropriate firmware...please?

any help/support thanks in advance
SPR = Sprint a US carrier. The following firmware will update to Android 11. Flash this in odin. https://galaxyfirmware.com/model/SM-G986U/SPR/G986USQS1DUB8
 

Droid9684

Senior Member
May 9, 2011
496
38
THANK YOU!
one more quick question....i have read and...is really necessary to remove google and samsung accounts before using odin?


will try this weekend
Your welcome! And no you don't need to remove google or samsung accounts. You do have to remove Samsung kies if installed tho. If you have any other questions let me know! I just looked at your profile your from Honduras? So you do not live in the US? If this is the case i'm not sure how you have a US carrier (Sprint) phone.
 
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rsaenz99

Member
Oct 14, 2021
5
1
Honduras
Your welcome! And no you don't need to remove google or samsung accounts. You do have to remove Samsung kies if installed tho. If you have any other questions let me know! I just looked at your profile your from Honduras? So you do not live in the US? If this is the case i'm not sure how you have a US carrier (Sprint) phone.

i use SmartSwitch...do i remove it?

there is no country side for my location from samsung phones
the ones they sell comes even souther regions...like colombia or peru

people send or buy thru-ebay and they sell them here,
we prefer the US variants of samsungs since they all carry snapdragons cpus

mine is s20+ unlocked U variant with csc SPR ( i even see SPR on top the screen when put into download mode)
 

Droid9684

Senior Member
May 9, 2011
496
38
i use SmartSwitch...do i remove it?

there is no country side for my location from samsung phones
the ones they sell comes even souther regions...like colombia or peru

people send or buy thru-ebay and they sell them here,
we prefer the US variants of samsungs since they all carry snapdragons cpus

mine is s20+ unlocked U variant with csc SPR ( i even see SPR on top the screen when put into download mode)
Sounds like the same thing as Samung Kies to backup everything. Yes remove it then just in case so you can use odin to flash firmware.

The snapdragons are harder to unlock bootloader. Your better off with exynos chip.
 
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rsaenz99

Member
Oct 14, 2021
5
1
Honduras
Sounds like the same thing as Samung Kies to backup everything. Yes remove it then just in case so you can use odin to flash firmware.

The snapdragons are harder to unlock bootloader. Your better off with exynos chip.
yes, with smartswitch can do backups/restore even use backups from itunes

im make sure is ok;

steps to flash:
1. put the phone in developer mode (check)
2. no kies or smartswitch install on pc (check)
3. download / uncompress the stock firmware (check)
4. download / uncompress odin software (check)
5. use odin and flash!
(one quick question....
HOME file have to be in odin? i read even if is not; the phone gets full erased)

i might be almost ready
 

Droid9684

Senior Member
May 9, 2011
496
38
yes, with smartswitch can do backups/restore even use backups from itunes

im make sure is ok;

steps to flash:
1. put the phone in developer mode (check)
2. no kies or smartswitch install on pc (check)
3. download / uncompress the stock firmware (check)
4. download / uncompress odin software (check)
5. use odin and flash!
(one quick question....
HOME file have to be in odin? i read even if is not; the phone gets full erased)

i might be almost ready
Idk what home file is honestly. The pit is automatic detected and firmware file should be in pda location. Everything else is good to use odin.
 

mojicacarmelo

Senior Member
Jan 18, 2019
52
3
I have flash with success s20+ and some others too using user data from OP but in last 2 weeks after i flash (same files used before) cannot update over OTA it says firmware "already up to date" i know that not the case because for it to be "up to date" i need to OTA around 3 times after i flash with OP Files, the phone has at&t features working and at&t active sim card, only the OTA is the issue maybe at&t has found those files and block em somehow anyone have any idea 🤔 (this start 2 weeks ago)
 

iBowToAndroid

Senior Member
Nov 9, 2010
4,899
1
1,560
Twin Cities MN
I have flash with success s20+ and some others too using user data from OP but in last 2 weeks after i flash (same files used before) cannot update over OTA it says firmware "already up to date" i know that not the case because for it to be "up to date" i need to OTA around 3 times after i flash with OP Files, the phone has at&t features working and at&t active sim card, only the OTA is the issue maybe at&t has found those files and block em somehow anyone have any idea 🤔 (this start 2 weeks ago)
What's your current Baseband Version?
 

iBowToAndroid

Senior Member
Nov 9, 2010
4,899
1
1,560
Twin Cities MN
I use the files from OP wich are back from may of this year if you need the exact number i have to flash again to give you the exact number, because when i notice this problem i just flash to u1 wich dont have this problem and update just fine
Why do you have to flash again? Just go in your Settings right now and tell me what you see for the Baseband Version
 

lone_slayer

Member
Apr 5, 2012
12
0
I'm looking at changing my G986U (Verizon) to a XAA G986U1 is this all still working or have things changed. I'm currently using the latest stock Verizon firmware and am wanting to go to stock Samsung as I live in New Zealand, at the moment everything works I am on the Skinny network if I restart my phone it loads up the Verizon splash page and tells me I am not using a Verizon sim. I get 4g logo in the status bar (greys out if data turned off) which seems different to my non branded phones so was wondering if this changes on G986U1. I currently get firmware updates OTA but the software update screen looks different to my non Branded phones will I still get this once changed to G986U1. Also under service provider information I see VZW/XAA/VZW. I purchased the phone used so I don't know if this firmware has been changed.

I have downloaded Odin 3.14.1_3B_PatcheD and the latest G986U1 XAA firmware from sammobile is there anything else I need to know or should check?

Thanks for any help
 

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    For those who aren't already aware, G986U is the model number of all of the US carrier versions of the S20+. The G986U1 is the model number of the same device, but sold by Samsung SIM unlocked and with no carrier bloatware. Firmware is 100% interchangeable among these models: any U or U1 firmware version can be flashed to any U or U1 device at any time, assuming that you're not trying to downgrade the bootloader. Also, U firmware is identical for the 4 base files (AP, BL, CP, CSC) for each individual build, no matter which carrier it comes from. So if you download 2 different carrier versions of the exact same build, the 4 base files will be identical. Where the firmware differs is in the USERDATA file - that's where the carrier bloatware and customizations reside.

    Manual Odin flashing is designed for those who:

    - want to manually update to a newer version of U firmware on their U device, either because they don't want to wait for their carrier's OTA or because OTAs aren't working on their device, or a different carrier got a new feature/patch before they did
    - want to flash U1 firmware to their U device
    - want to convert from U1 firmware to carrier U firmware
    - want to convert from one carrier's U firmware (with all apps and bloatware) to a different carrier's U firmware (with all apps and bloatware)

    For those who aren't already aware, anyone can now download firmware for almost any Samsung device any time that they want, via SamFirm or Frija. There are threads and info about them here on XDA so I won't waste time explaining - do a search if you're not already familiar with these tools. But they only provide whatever the latest/newest/current version is - nothing older. I pay for a subscription to a site that gets the official releases (usually) before they hit SamFirm/Frija, so that's where my files come from. However, I don't have unlimited bandwidth on the site, and it's also quite time consuming to download the files, zip them up, and upload them to AFH. And, I do threads like this for every single Sx and Note x model - so I won't be uploading every single version. The only full builds that I upload are ones where I get access to a new bootloader and/or Android version early, before they hit SamFirm/Frija.

    This is not a "beginner's guide to Odin flashing" -type post/thread, so I won't list basic, step-by-step flashing instructions. My threads are geared towards those who already know what they're doing. If you're new to manually flashing Samsung firmware (or haven't done it in a long time), I recommend you consult one of those "beginner's" guides- there are tons of them here on XDA.

    Happy flashing!

    U firmware: https://www.androidfilehost.com/?w=files&flid=305579
    U1 firmware: https://www.androidfilehost.com/?w=files&flid=305580

    Notes:

    - DON'T QUOTE THE OP WHEN YOU REPLY, kthx

    - I have lots of threads just like this one for other Samsung flagships, if it interests you. For those who have already made use of my previous threads for a different device and are upgrading to an S20, welcome back :)

    - My zips are compressed extra small for space and bandwidth savings. The default Windows extractor can't handle it, so you'll need a 3rd party tool like 7zip, WinRAR, etc

    - My naming method for folders on AFH is: build - bootloader - Android version
    So "SAT - 1 - 9.0" means the full build number ends in SAT, it's bootloader version 1, and it's Android 9.0. When bootloader and Android versions increment, the first build to have those changes will have its folder notated appropriately.

    - HOME CSC file keeps data intact; using the other CSC will wipe data. Flashing USERDATA will also wipe data.

    - Since AT&T doesn't allow their firmware to be publicly available (for any of their devices), I'll try to always upload at least one USERDATA per bootloader increment for AT&T (and Cricket, if they get this model). I'll also upload any full builds if AT&T is the only carrier to get that specific build, because you won't be able to find the files anywhere else.

    - For identifying USERDATAS, and to know what region/CSC to use in SamFirm/Frija:

    AIO = Cricket (not available via SamFirm/Frija)
    ATT = AT&T (not available via SamFirm/Frija)
    BST = Boost Mobile
    CCT = Xfinity Mobile (Comcast)
    CHA = Spectrum Mobile (Charter)
    SPR = Sprint
    TMB = T-Mobile
    TMK = Metro PCS
    USC = US Cellular
    VZW = Verizon (available via SamFirm/Frija, but Manual Entry is required - Auto will not work)
    XAA = U1 firmware

    - the correct procedure for switching from one carrier's firmware to another is:
    1. Flash full U1 firmware package including non HOME CSC
    2. Upon boot, insert a SIM of the carrier whose firmware you want
    3. Watch for the popup that says "reboot to apply new carrier settings" etc, and do it
    4. After that restart completes, reboot back to Download mode and flash the full U firmware package, with the USERDATA file of the carrier whose firmware you want
    5
    Notes:

    1. I do not have one of these and do not plan to acquire one, so I have no idea if anything can actually be flashed at this moment - I'm just providing the firmware. Like all other models, I'm assuming patched Odin is needed for this, but it wouldn't surprise me if a new version is needed for this specific device. There's only one way to know though, so as soon as someone gets their hands on one and can try this, please let us know

    It's been confirmed that Odin 3.14.1 Patched is needed for flashing S20s - https://forum.xda-developers.com/android/software/patched-odin-3-13-1-t3762572

    H/T @clabern

    2. I don't know if using the HOME CSC will actually save data. I don't get access to that file straight from the source - I have to decompile the regular CSC, remove the parts that initiate the factory reset, and then re-compile it. Based on the S10 and Note 10, I've done what I think will avoid a factory reset. But the S20 has some new partitions, so we won't know for sure until someone tests it. So if you're willing to be that guinea pig, you're responsible for taking proper steps to avoid an FRP lock, make sure your data is backed up, etc
    4
    Just wanted to let folks know I had to use this patched Odin (3.14.1_3B) in order to flash unlocked (U1) firmware on my Verizon S20+. Pulled the most recent firmware from Sammobile and flashed it successfully.
    2
    maybe i am misreading the OP but can the stock firmware be used to go from t-mobile to stock?

    Yes, if by "stock" you mean "factory unlocked" aka U1.
    2
    One interesting came to mind today. I have a U1 from Samsung fully paid. I'm using att sim in it. It got the update to ATBN when I first used the phone. I've been reading the ATC1 fixes camera etc. I have no updates OTA available. When I click into the software update section, the last update was ATN but it gave me a link to the update notes and it had ATT as a dir on the URL.... I thought mine is a XAA which does have the latest update. Can someone chime in their understanding of the firmware affected by using a certain sim? I don't really want to reset the device just to get an update early.
    Even U1 devices have small invisible carrier customizations, determined by the SIM that's inserted. That's why, even for U1, other CSCs/Regions exist. You can get U1 firmware from SamFirm/Frija using any of the regular carrier codes - SPR, BST, TMB, TMK, etc - and the firmware that it gives you will have those customizations already set. When you change SIMs and get the "restart to apply new carrier settings", that's what it's doing.

    Just like U firmware, U1 firmware isn't distributed to each carrier at the same time, nor do they all get the same versions. For example, as of this moment, if you look up U1 firmware in SamFirm or Frija under TMB (T-Mobile), it'll give you build TBN. But if you look it up under CCT (Xfinity Mobile), it'll give you TCH.

    The great thing about universal firmware is that you can flash any version, any time that you want. So there's never a need to feel like you're stuck waiting for an OTA