yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S8+ Guides, News, & Discussion] androw3349:
Hello,

Sorry if im going to ask dumb questions.

1: i have S8+ SM-G955N

2: I'm having problems with calls on tmobile on stock firmware (virgin phone) if i want to change the csc to tmobile one, after i fellow the whole csc changing guide then i flash my standard firmware which will be G955NKSU1AQI1 the whole process will trip knox to 0x1 (i wont use custom fw) everything will be standard, thanks for your guide its amazing im waiting on your reply
[Samsung Galaxy S8+ Guides, News, & Discussion] elliwigy:
fyi the last 3 letters in the software version are NOT hard coded
[Samsung Galaxy S8+ Guides, News, & Discussion] Mike15678:
You've listed the correct order of steps.

Knox won't be tripped, as your end result would be stock firmware. Safetynet won't be tripped, as well, as you're not modifying the "/system" partition of stock firmware.

Also, as elliwiggy stated, you're last three characters of your CSC code won't be changed, as they are hardwired into your phone. Additionally, Download Mode will display your original CSC code, once you change your CSC code.
[Samsung Galaxy S8+ Guides, News, & Discussion] androw3349:
So there is no way i can change my csc since im korean version or i misunderstood? What do you mean
[Samsung Galaxy S8+ Guides, News, & Discussion] zBobs:
thank you!
[Samsung Galaxy S8+ Guides, News, & Discussion] KingKristo:
I need help...

I did everything you said to do and I did stock firmware. I put t-mobile on my sprint phone but now it keeps saying invalid sim card. what do I need to do?
[Samsung Galaxy S8+ Guides, News, & Discussion] jim262:
Don't mean to be rude or perhaps I am missing something, but all I ever did was flash software in Odin and it worked. I Have flashed T-Mobile phones and Verizon phones with stock unlocked firmware and used sims from different carriers and never had any problem with it either recognizing the sim or receiving updates.
[Samsung Galaxy S8+ Guides, News, & Discussion] KingKristo:
Im guessing its because I have a SM-G955U
[Samsung Galaxy S8+ Guides, News, & Discussion] ElementRn:
You saved the phone of a good friend of mine. Kudos for the fast mirrors. Those registration captures drove us nuts.
[Samsung Galaxy S8+ Guides, News, & Discussion] vanornum:
Unlocked S8+ to AT&T Firmware Clarifiction

So Just to be clear, If I am flashing from an Unlocked Galaxy S8+ to AT&T Version firmware I need to use "Carrier Switching" instructions first? Then to get the latest Standard AT&T Galaxy S8+ update I need to do "Flashing Standard Firmware", in that order?

Additional questions: If I performed just "Carrier Switching" from Unlocked Firmware and then tried to do a Software Update OTA from AT&T, wouldn't that also give me the latest Standard AT&T Galaxy S8+ update too?

In the event of something not working and wanting to get back to Factory Unlocked Firmware I would follow the "Flashing Unlocked Firmware" instructions?
[Samsung Galaxy S8+ Guides, News, & Discussion] z06mike:
Anyone have new links for the firmware? I'm trying to flash my wife's phone and do not have the files on this comp, but updato is giving a 404 error,
[Samsung Galaxy S8+ Guides, News, & Discussion] ampicillinct:
I bought G955U ATT from CL and the first owner has it unlocked by ATT already.

Plan to use this on Sprint one year free plan (and switch to Xfinity Mobile after that) . Should I use the OP's instruction from beginning to end?

Saw someone mentioned he only need to flash ODIN? What that mean? Thanks
[Samsung Galaxy S8+ Guides, News, & Discussion] 012345678:
what phone exactly
[Samsung Galaxy S8+ Guides, News, & Discussion] raptors2k:
guys I am stuck at step 34. I have the blue screen where you enter the IME number.

but when I try to do the echo"TMB">efs/imei/mps_code.dat (...\Samsung 8+\adb shell\platforms-tools>after this path)

it just says "system cannot find the path specified" So what do I do now? power down and go straight to "flashing standard firmware"

it's like 3am..lol.. I will keep trying tomorrow.. so if Anyone can give me some tips.. really appreciated. thank you.

first time flashing ...

{

34) *LOOK A TINY BIT BELOW!* Type in "echo "XXX" > /efs/imei/mps_code.dat" (the quotation marks that surround the X's are used, but not the ones that surround the whole command... you know that by now- right?) and REPLACE XXX with your preferred CSC code.

Chose one of these CSC codes:

BST Boost

VZW Verizon

ATT ATT

USC US Cellular

ACG C Spire

TMK MetroPCS

VMU Virgin Mobile

TFN Tracfone

XAS Sprint

TMB T-Mobile

XAA Unlocked US

SPR Sprint

CCT Xfinity Mobile

AIO Cricket

35) Type in "exit" in the ADB shell.

36) Type in "adb reboot bootloader" and flash your desired firmware by following the "Flashing Standard Firmware" section of this guide or by following the "Flashing Unlocked Firmware" section of this guide. PROFIT FOR NOW. }
[Samsung Galaxy S8+ Guides, News, & Discussion] raptors2k:
SO i went on to flash standard firmware. I download it form Sammobile. for the Tmobile version CSC_OYN_G955UOYN1AQHD. I rebooted the phone but looks like no tmobile bootloader comes on.

I did the volume up power and bixby. .. at the middle bottom page where it says "applied the CSC-code: XAC.

what is XAC?.. i don't even know.. what should I do know?.. phone looks like its working.. but I don't think I have all the tmobile features..

help plz...
[Samsung Galaxy S8+ Guides, News, & Discussion] raptors2k:
which settings or steps let see what you mention abovefor your csc? (TMB/TMB/TMB)?

thanks

---------- Post added at 02:16 PM ---------- Previous post was at 02:15 PM ----------

so after unsuccessful tries, where my CSC kept on as XAC, ( I guess is the Canadian version that you flash in Carrier Switching). I was again stuck on step 34, So I decided to go and flash the unlock version for TMBILE, although I don't really know why they are so many unlock version firmware for USA on Sammobile, depending on your carrier. I chose the latest one 955U1 for TMB, So I flash it using the Unlock guide.

Then I use the VOL up key, Bixby, power. I saw the my CSC change to TMB, nice, but on the unlock I do not have the Tmobile features. Since "all mighty Mike" said that if you have the same CSC, to the one that you are going to flash, you can go straight to step Flashing Standard Fimrware. I follow the step, (download the latest tmobile firmware 955U) and the Final result I have a fully Tmobile rom phone, with all it's little perks. So Wife was finally Happy with her Phone, happy wife happy life.

I wonder if there is a guide like this for my NOTE8.

thank you guys. and Kudos to MIKe and BLue.
[Samsung Galaxy S8+ Guides, News, & Discussion] bhuvnesh.dev@gmail.com:
Verizon to Tmobile

I have Samsung S8+ Verizon unlocked version, if I want to move to Tmobile version. So for that do I need to follow Flashing Standard Firmware?
[Samsung Galaxy S8+ Guides, News, & Discussion] kclive:
Are there any other links for the firmware files that aren't on updato? I am trying to flash my wife's sim unlocked AT&T S8+ over to T-Mobile and need the firmwares but the files on updato have been downloading for about an hour now and still have 12-15 hours left! This is crazy, surely there has to be a faster mirror out there.
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
Does anybody have the canadian home csc?
[Samsung Galaxy S8+ Guides, News, & Discussion] Mike15678:
Try using this: https://xdaforums.com/galaxy-tab-s/general/tool-samfirm-samsung-firmware-t2988647

Make sure you download the latest version of SamFirm and get all of its prerequisites. Then, extract the zip and launch the executable. Enter "SM-G955U" as the model number and "TMB" as the region. Make sure you check the "Manual" box and enter the "PDA", "CSC", and "Phone" fields with the appropriate information from http://fw.updato.com . Check the "Binary Nature" box and then click on "Check Update". Finally, make sure the "Check CRC32" and "Decrypt Automatically" boxes are checked and then click on "Download." You will get the latest firmware directly from Samsung. Hope this helps!
[Samsung Galaxy S8+ Guides, News, & Discussion] Mike15678:
I'll be providing that soon.
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
Already found it somewhere else
[Samsung Galaxy S8+ Guides, News, & Discussion] kclive:
After all the process is done my phone now shows XAA/XAA/ATT

Is this normal for the phone to now be on T-Mobile? I think I missed something somewhere

---------- Post added at 05:47 PM ---------- Previous post was at 05:15 PM ----------

I've noticed also that my wifi calling option is now gone too. Anyway to get this back?
[Samsung Galaxy S8+ Guides, News, & Discussion] Mike15678:
If you flashed T-Mobile firmware and changed your CSC correctly by following the "Carrier Switching" section, the CSC sequence should now be "TMB/TMB/ATT."

Can you please post a screenshot showing the contents of the firmware archive?

After you follow my request above and I approve, please read what I next have to say: It seems that you're on unlocked firmware; therefore, to rectify this issue you must follow the "Carrier Switching" section to change your CSC to "TMB" and then use your downloaded T-Mobile firmware and flash it by following the "Flashing Standard Firmware" section.

I hope this helps!
[Samsung Galaxy S8+ Guides, News, & Discussion] kclive:
Here is what I downloaded
[Samsung Galaxy S8+ Guides, News, & Discussion] Mike15678:
That looks good. Continue with what I said above.
[Samsung Galaxy S8+ Guides, News, & Discussion] kclive:
When you get to the step of flashing the factory firmware after everything else, should I use home csc or csc for the final step? Should I also use userdata in the ums slot too?

Also when I get to this step, once I have done all of this and type exit in adb shell it doesn't do anything. I have to back out and go into adb once again to type in adb reboot bootloader for it to do anything.

30) Once your phone reboots, you will see an "IME" button on the 'factory binary homescreen'. Its on the bottom. Tap on it.

31) A number pad should appear. Type in "*#243203855#".

32) A menu will pop up. Scroll down until you find an "XAC" option. Tap on it and tap "Install".

33) Your phone will reboot. Once it reaches the 'factory binary homescreen', go to ADB on your computer and type in "adb shell".

34) *LOOK A TINY BIT BELOW!* Type in "echo "XXX" > /efs/imei/mps_code.dat" (the quotation marks that surround the X's are used, but not the ones that surround the whole command... you know that by now- right?) and REPLACE XXX with your preferred CSC code.

Chose one of these CSC codes:

BST Boost

VZW Verizon

ATT ATT

USC US Cellular

ACG C Spire

TMK MetroPCS

VMU Virgin Mobile

TFN Tracfone

XAS Sprint

TMB T-Mobile

XAA Unlocked US

SPR Sprint

CCT Xfinity Mobile

AIO Cricket

35) Type in "exit" in the ADB shell.

---------- Post added at 07:00 PM ---------- Previous post was at 06:42 PM ----------

Nevermind, figured out what I needed, flashing now

---------- Post added at 07:15 PM ---------- Previous post was at 07:00 PM ----------

Still no luck, still shows up as XAA/XAA/ATT

---------- Post added at 07:36 PM ---------- Previous post was at 07:15 PM ----------

When I get to the flashing standard firmware there is no way to enter the userdata, the box is greyed out on odin 3.12.7

Should I use odin 3.12.5 instead?

---------- Post added at 07:49 PM ---------- Previous post was at 07:36 PM ----------

Got it FINALLY! Thank you for all of your help!
[Samsung Galaxy S8+ Guides, News, & Discussion] cam30era:
What were you doing wrong, and how did you fix it?
[Samsung Galaxy S8+ Guides, News, & Discussion] kclive:
It turned out I was doing the steps right, but for some unknown reason it wouldn't work for me until I copied and pasted all of the steps in adb.
[Samsung Galaxy S8+ Guides, News, & Discussion] JJ1959:
CSC vs HOME_CSC

Why is it one should use the CSC? I'm simply trying to bypass the FRP protection, and in following one guide (not from here) it says to use the HOME_CSC.

Also, the SamFirm site is down for maintenance so I couldn't dl the firmware from there. Hence, I found my way here. I downloaded it from here (mirror), but all of the files are tar.md5's. Will Odin load the firmware with the md5 appended, or do I delete that extension?

Thanks much in advance!
[Samsung Galaxy S8+ Guides, News, & Discussion] JJ1959:
FRP not being removed

I used the ROM download from this site for my S8+ SM-G955U - I imagine with Nougat 7.0 - that I'm locked out of due to FRP. It didn't seem to take, though. Do I need to have the old sim in/out, or does it matter? The last time I had it out the whole time, fwiw. Should it work on the latest Nougat, or do I need to roll back to an earlier version? Any other thoughts/help would be appreciated. I simply need to get past the FRP, but it's still asking for the prior owner's gmail, which I put in, but it doesn't matter since the FRP had been activated.

Thanks much!
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
I have the files I could send them to you.
[Samsung Galaxy S8+ Guides, News, & Discussion] JJ1959:
Thanks; appreciated, but I don't think that's the issue. And the SamMobile site is back up for free downloads, so I'm doing that now. I'll confirm that the one I got was the same and/or try again with this one.

My concern is whether there's something else I'm doing wrong (I can't put in url's to show what I followed; with Odin I first applied the Combination file (COMBINATION_FA70_G955USQU1AQD8...), then applied the ROM with Odin, using the BL, AP, CP and Home_CSC files. Or I'm wondering if it's not possible to do this procedure with the latest Nougat, which I'm thinking is on my phone, and I need to downgrade, first? Would appreciate a link to do so, if that's needed.
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
You would need to downgrade to the factory firmware by flashing it in official odin first then once you're on it type in adb reboot bootloader into adb. Then flash HOME_CSC with comsy odin. Wait till it gets to the home screen then tap on IME and type in #243203855# choose the XAC option and press install. once your phone reboots go to adb type in adb shell then type in echo "XXX" > /efs/imei/mps_code.dat Also the combo firmware this one uses has baseband QCF not QD8. replace XXX with one of these CSC codes

BST Boost

VZW Verizon

ATT ATT

USC US Cellular

ACG C Spire

TMK MetroPCS

VMU Virgin Mobile

TFN Tracfone

XAS Sprint

TMB T-Mobile

XAA Unlocked US

SPR Sprint

CCT Xfinity Mobile

AIO Cricket

Edit: Here's the canadian csc https://drive.google.com/uc?export=download&id=1Z85hOQnNexDV4EO9b43g4ZXudKa26boq it's to save time from downloading from the extremely slow updato or sammobile
[Samsung Galaxy S8+ Guides, News, & Discussion] funter:
Does this trip Knox counter?
[Samsung Galaxy S8+ Guides, News, & Discussion] JJ1959:
Thanks for the guide! Though I note that it says one must remove the google account associated with the phone. That's my exact problem; I can't do that, due to Factory Reset Protection. I get to a screen asking me to login with that last account (which it apparently is still remembering, or at least knows that one exists), but even doing that (the guy gave me his login info) prompts me that the device was subjected to an Unauthorized Factory Reset (and it wasn't, as Samsung had me do it). Samsung now says I need to send it in with a receipt, but I can't get ahold of the guy I bought it from. So I need to bypass the FRP.
[Samsung Galaxy S8+ Guides, News, & Discussion] cam30era:
No it does not.

Recommendation for the future: Please don't quote the entire OP. It clutters the thread. Just put the "@" symbol in front of the person's name. ?
[Samsung Galaxy S8+ Guides, News, & Discussion] BlueFox721:
Check out this link:

http://forum.gsmhosting.com/vbb/f162/gsm-flasher-frp-reactivation-lock-remover-pro-2200193/

For information about frp unlock or bypass
[Samsung Galaxy S8+ Guides, News, & Discussion] jt1998:
[MENTION=8352198]Mike15678[/MENTION] Thanks so much for this thread/guide. I used it last night on my newly (used) purchased Verizon s8+. I carrier switched to Tmobile and flashed the tmobile firmware. It all went flawlessly but I was a nervous nellie. Thank you so much for the detailed instructions - you have helped this community a great deal!!!
[Samsung Galaxy S8+ Guides, News, & Discussion] amieldl143:
I have Sprint S8 and flashed g950U1 XAA everything works even wifi calling. Any ideas on samsung messaging not showing advance messaging RCS. Only works when I use google message. How to get this feature. If I flashed G950U1 SPR FW, will I get bloatware? Thanks
[Samsung Galaxy S8+ Guides, News, & Discussion] JJ1959:
Thanks for the attempt, but mine is Sprint CDMA, not GSM.
[Samsung Galaxy S8+ Guides, News, & Discussion] BlueFox721:
That goes for all Samsung devices...your device can also switch to all carriers...just like the Note 8...
[Samsung Galaxy S8+ Guides, News, & Discussion] JJ1959:
I downloaded the tool, and mine is not listed among them. SM-G955U.
[Samsung Galaxy S8+ Guides, News, & Discussion] jt1998:
That means you have the north american version. Should work fine with this guide. Mine is the same version, was with Verizon and I successfully changed it to Tmobile like I stated a few posts above. You can do it - just have everything downloaded, ready, and time/patience.
[Samsung Galaxy S8+ Guides, News, & Discussion] albaniandroid:
Hello guys , hope everyone is doing good.. inwas wondering..i get lots of no service on my sprint s8+

Anything to fix it? Thanks !
[Samsung Galaxy S8+ Guides, News, & Discussion] pherric:
Flashed the unlocked fw on my new black friday verizon s8, thanks for a very clear guide OP!

Can any one tell me if the verizon s8 will support dual SIMs with a different firmware or is the second slot actually disabled at a hardware level?
[Samsung Galaxy S8+ Guides, News, & Discussion] BigBadger:
Kernel Panic while in Factory Binary

Unlocked Sprint G9655U phone. Attempting to switch to ATT with Carrier Switching instructions. All goes well to step 31. In the middle of step 31, while trying to enter the code into the number pad, the phone reboots to a Kernel Panic screen. I have tried two different Canadian firmwares. Anyone else run into this or have any ideas?

30) Once your phone reboots, you will see an "IME" button on the 'factory binary homescreen'. Its on the bottom. Tap on it.

31) A number pad should appear. Type in "*#243203855#".

32) A menu will pop up. Scroll down until you find an "XAC" option. Tap on it and tap "Install".
[Samsung Galaxy S8+ Guides, News, & Discussion] jt1998:
no, didn't have that happen. Definitely could be a bad download/issue. I can try to upload my copy tonight after work, but it won't help you right now. Just let me know via reply if you want me to upload it to share with you. Hang in there - it'll get resolved!
[Samsung Galaxy S8+ Guides, News, & Discussion] cam30era:
FWIW: another user, a couple of pages back, reported that they had to copy and paste the number for it to work. I can't confirm or deny this, but thought I'd at least mention it.
[Samsung Galaxy S8+ Guides, News, & Discussion] thekojac:
I flashed the U1 firmware to my Verizon S8+ and everything works great, but yesterday my phone started losing service every couple of minutes before finding service again after about 30 seconds.

It makes my phone basically unusable right now. Any ideas? I've already tried resetting network settings and everything and it's not my sim card, as it works fine in my other phone.
[Samsung Galaxy S8+ Guides, News, & Discussion] jt1998:
so you just went from stock verizon to the unlocked verizon firmware? shouldn't need carrier switching then....interesting...dunno, sorry.
[Samsung Galaxy S8+ Guides, News, & Discussion] thekojac:
I flashed this one: http://updato.com/firmware-archive-select-model?record=EB25573F8DDA11E7963AFA163EE8F90B

Does it matter if I flashed the XAA vs. The USC one? Or vice-versa?
[Samsung Galaxy S8+ Guides, News, & Discussion] jt1998:
Well I can only speak for my experience, but I specifically flashed the stock T-Mobile latest firmware. I didn't want to use the unlocked or any other variant that I was unsure about. That could be causing a problem for you. You can test it by flashing the stock Verizon firmware and see if that resolves any of your issues.
[Samsung Galaxy S8+ Guides, News, & Discussion] eXtreme Burrito!:
Recently flashed latest unlocked firmware onto Verizon S8+. Losing service every couple minutes.

Trying to flash back and I'm getting SW REV Errors in odin constantly (FUsed 2 > Binary 1). Downloaded latest VZW firmware from updato.
[Samsung Galaxy S8+ Guides, News, & Discussion] jt1998:
No guarantees but I think I read somewhere that updatos files were incomplete some of the time. Try getting the desired firmware elsewhere via a Google search. I'll see if I can find where I got my tmobile one bc updatos was incomplete for me and i kept getting odin fails.
[Samsung Galaxy S8+ Guides, News, & Discussion] Mr. Orange 645:
With the newest version of the unlocked firmware, Samsung updated the Bootloader to version 2, and you can't flash any software with the version 1 bootloader. You will have to wait until a more updated version of the Verizon software is released.
[Samsung Galaxy S8+ Guides, News, & Discussion] jt1998:
UPDATE -

Here's a link for verizon stock firmware. Hopefully it has everything in it - my updato files lacked userdata that was needed in the UMS step when i was flashing the stock firmware. I was perplexed until a did a google search for a different source. Good luck!

2nd update - here's another LINK from sammobile - slow but free. Again, verizon stock 8+ firmware
[Samsung Galaxy S8+ Guides, News, & Discussion] djteotancolis:
Thank you for the guide. Worked perfectly and using a Sprint phone with an International carrier. Quick question Is Any one using Sprint service with an unlocked firmware? or would it cause issues?
[Samsung Galaxy S8+ Guides, News, & Discussion] cmiller1591:
Sprint S8+ headache

I have a sprint S8+ that is fully paid for and confirmed to be sim unlocked by Sprint, ATT, Tmobile, and swappa. I tried using an active ATT sim in the phone that was even assigned to its IMEI on ATT network with stock Sprint firmware and received an "invalid SIM card" error. Same issue with an active Tmobile sim.

I then flashed the Tmobile firmware from July 18 that way if it worked I could also test OTA updates. Process returned no errors and phone booted with Tmobile welcome. Put in the active Tmobile sim and got the same invalid sim message. CSC codes read as TMB/TMB/SPR as they should but the network status info all read as unknown, etc.

Then I tried the unlocked firmware linked on the original instructions post. No issues during the process again and it booted up as it should. Tmobile sim inserted and no invalid sim message this time but it would not connect to the network. CSC in recovery mode read as XAA like it should but uknown network status again.

Gave it 1 more try and download the Tmobile firmware from September as I still want to verify OTA updates will work. Again I followed the process exactly as described with no issues. Phone booted with Tmobile welcome and CSC read TMB/TMB/SPR and recovery screen showed TMB. Put in active Tmobile sim and again invalid sim message. Tried a brand new, never used, confirmed to be cleared, Tmobile sim and still get the invalid sim message.

The only other option I can think to try now is uninstall all computer programs, delete firmwares, and redo all the downloads to try the same process.

Can anyone give me some advice or insight as to what may be causing the invalid sim issue?

FYI: I did change odin ums/patch to 1, loaded the correct files within odin including CSC file not HOME_CSC, etc. Followed every instruction and even copy pasted the ADB commands to be sure and never had errors
[Samsung Galaxy S8+ Guides, News, & Discussion] Michael4407:
Excuse me, this might seem silly to ask, but if i'm using a G955U from Sprint (SPR/SPR/SPR), can i flash the G955U1 XAA firmware? Will any core features be affected?