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

This is regarding the Verizon model. I want to flash it to European firmware (Bulgaria - carrier neutral).

I followed the guide and downloaded Unlocked firmware by using SamFirm - European one to be precise - . I tried to flash it on the Verizon model, but every time I try, I get failure messages. I get a "SECURE CHECK FAIL: PIT" message on the phone, and "FAIL" and "Re-Partition operation failed." in PrinceComsy's Odin. I also tried Patched Odin, but it doesn't make any difference.

I have Baseband G950USQU2BQK5, which I understand means I have bootloader v2. I am on Android 7.0, if that makes any difference. I get a message RPMB FUSE BLOWN in download mode.

The firmware I downloaded through SamFirm has CSC file name "CSC_OXM_G950FOXM9DTF1_CL18920278_QB32019582_REV00_user_low_ship.tar" - I think the version of the baseband should be the third word. So the bootloader should be v9?

Any ideas what I am doing wrong?
[Samsung Galaxy S8 Guides, News, & Discussion] User_99:
You can not flash a firmware for an Exynos Modell to a Snapdragon Modell!
[Samsung Galaxy S8 Guides, News, & Discussion] VitaminX:
I've managed to install US XAA firmware. The whole reason I needed to install EU firmware was to use my local language. Fortunately, I was able to add a new display language through the language menu. I tried that only after I upgraded to Android 9.0, so I can't confirm it works on older versions.

Basically, you can add other languages (different from the ones already listed) by just tapping on the 3 dots menu in the language settings. Some of the apps still display English, although most are displayed in the language you selected earlier.

I hope this helps someone.
[Samsung Galaxy S8 Guides, News, & Discussion] Zaileion:
I've read through the thread and you make it clear this is only for Snapdragon devices. I have a Note 10+ 975f Exynos and was wondering if there was a way I could do this on my phone. I would like to switch it to AT&T or just USA.

I can flash different region firmware no prob, but changing the Carrier ID as shown in Download Mode is the problem. Mine always says MID.
[Samsung Galaxy S8 Guides, News, & Discussion] theoretically:
Hey Mike. Were you able to finish the s8+ guide? Looking forward to it. Thanks for all your help.
[Samsung Galaxy S8 Guides, News, & Discussion] Poli169:
Hello i had quick question i downloaded the unlocked firmware and then the att firmware in case i wanted to go back to att but both files appear to be the same. Am i doing something wrong when downloading the firmware or are they suppose to be the same name? Any help would be greatly appreciated.
[Samsung Galaxy S8 Guides, News, & Discussion] TylerG518:
Yes you did, Mike! Thank you so much! I feel like the biggest idiot ever!! I thought you only needed to follow the carrier switching guide if you were coming from U1... But it makes sense now that I think about it. It took a while to complete but it was all worth it because now I've unlocked the correct TMobile band and enjoying my 5 bars of LTE! :D Thanks so much, if it wasn't for your guide I don't know what I would have done! & I love how less bloated T-Mobile's FW is compared to Verizon!
[Samsung Galaxy S8 Guides, News, & Discussion] theoretically:
Which unlocked firmware did you use for your S8+? I just tried flashing this one

http://updato.com/firmware-archive-select-model?record=8E529E55517011E7963AFA163EE8F90B

I got the message "Model dismatch fail"
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
I'm almost done. It should be published by the end of today.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
You downloaded the correct Unlocked firmware (SM-G950U1), but didn't download the correct stock firmware, which is "SM-G950U". There is no stock AT&T firmware (SM-G950U) as if right now, but people have been reporting that the T-Mobile firmware works fine. Try checking the introduction for more info.
[Samsung Galaxy S8 Guides, News, & Discussion] Poli169:
Ok so i flashed the firmware for the unlocked verison and my model number now shows as SM-G950U1 and all my bloat is gone which is good. Is this correct or should i have looked for the SM-G950U and flashed that instead?
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
The unlocked firmware has the model number "SM-G950U1", therefore you flashed the corrected firmware. You said earlier that you might want to go back to stock firmware, which has the model number "SM-G950U", therefore you should check the introduction.
[Samsung Galaxy S8 Guides, News, & Discussion] Poli169:
Ok got it thank you. Is there a way to remove all bloat and still have volte i looked at the carrier switching guide which is the one i assume you said to look at the introduction. I would love to be able to have no bloat and volte if its possible can you point me to the right direction thank you once agian.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
The unlocked firmware does not include carrier specific features, such as Wi-Fi Calling and VOLTE.
[Samsung Galaxy S8 Guides, News, & Discussion] bricky23:
For me that would be perfect. U1 firmware with working volte. Maybe some day.
[Samsung Galaxy S8 Guides, News, & Discussion] TylerG518:
I can't believe Samsung doesn't include VOlte or Wi-Fi calling on their unlocked firmware. Wi-Fi calling, at least, is becoming a standard feature on all of the post paid carriers these days. Even straight talk is beginning to offer Wi-Fi calling. Maybe someday they'll get their heads straight.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
ANNOUNCEMENT: I finally published the S8+ guide, which you can check out here: https://xdaforums.com/galaxy-s8+/how-to/snap-guide-flashing-standard-fw-carrier-t3627255. Both look very identical, but they have slightly modified steps and different dowloads in order to accommodate for S8+ users. Enjoy!
[Samsung Galaxy S8 Guides, News, & Discussion] ibjaredu:
Thanks for this, I installed the 950U T-Mobile firmware on my unlocked 950U1 and now volte is working. We'll see if reception is any better. FYI wifi calling was working on the unlocked XAA firmware.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
No problem and thanks for your input.
[Samsung Galaxy S8 Guides, News, & Discussion] forster:
Does anyone have SEE CSC firmware, please? (South East Europe) If not, can anyone please post where can i find one' Im a noob in flashing S8, cause i just got one, and never had Samsung phone before.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
This guide is only meant for U.S. Snapdraon variants, but I guess you can give it a shot. Here's the firmware link: http://updato.com/firmware-archive-select-model?record=E545B056527F11E7963AFA163EE8F90B.
[Samsung Galaxy S8 Guides, News, & Discussion] Eric_Sheill:
Are people reporting volte and wifi calling working with at&t sim card on T-Mobile firmware. I need WiFi calling, phone not connecting to my microcell at home. Also advanced messaging would be nice;)
[Samsung Galaxy S8 Guides, News, & Discussion] keithnet:
I got wifi calling working, but couldn't get volte working. I used my wife's S7 IMEI and AT&T claims my phone tells them that it's a S8 unlocked and give them my S8 IMEI.

I was able to get them to enable wifi calling, but couldn't get anything else.

I think advanced messaging might be working, but I replaced the built in app with textra.

-Keith
[Samsung Galaxy S8 Guides, News, & Discussion] fabioplata:
Question, what happen if install unlocked friwmware (come from att frimware) with out change to XAA "change carrier step", I will use this phone out of USA, with the att frimware works all lte bands, I mean I dont have problems with the signal. I preffer doit simple.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
The "XAA" CSC code is unlocked, allowing you to insert any SIM card of your choosing into your S8, as long as it is not SIM locked by your carrier. The unlocked firmware contains no carrier bloatware and is the only firmware that is compatible with the "XAA" CSC code. Changing the CSC is optional, though, unless you're changing carriers.
[Samsung Galaxy S8 Guides, News, & Discussion] martylavender:
Is there a way to flash this to remove all of the bloat but get features like video calling that Tmobile adds?
[Samsung Galaxy S8 Guides, News, & Discussion] N2BTS2:
Grandfathered Verizon UDP

If I use the unlocked version will it enable hotspot tethering without the subscription check? Thanks for the help.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
No, it does not circumvent the Hotspot check. That is tied into the SIM card, I believe.
[Samsung Galaxy S8 Guides, News, & Discussion] dalelindley76:
Hi all I'm on uk ee they haven't released the June update which firmware would be compatible to update please

Could I use the another carrier firmware from uk with the June update
[Samsung Galaxy S8 Guides, News, & Discussion] bricky23:
Yes it will. I get hot spot tethering on cricket wireless without subscription anyway. I only use carrier version so that I can get volte. Wish I could get both.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Wait for your carrier to release the June update. Check http://fw.updato.com for firmware for your carrier.
[Samsung Galaxy S8 Guides, News, & Discussion] dalelindley76:
Knowing ee could be months ??
[Samsung Galaxy S8 Guides, News, & Discussion] Thor2j:
I have unlocked factory s8. I guess there's no way of getting att VoLTE yet on in as there isn't any official att flash available yet. Is this correct. Seems like some got wifi calling working but that's it.
[Samsung Galaxy S8 Guides, News, & Discussion] bricky23:
All you have to do is change the csc to ATT. You can use any carrier firmware, t-mobile, verizon, doesn't matter. You will end up with ATT firmware. Make sure to use non-home csc file, and don't flash user data.
[Samsung Galaxy S8 Guides, News, & Discussion] Thor2j:
See post #80. Unless im missing something it doesnt look like it will work.
[Samsung Galaxy S8 Guides, News, & Discussion] Quickvic30:
I flash att user data by itself in the UMS slot after flashing all U1 and I get all the att extras. I have the att unlimited data plan and tethering is usually blocked but it works great on the U1 firmware with att user data. It installs a couple bloat apps but those can be uninstalled along with all the google and Samsung apps. It will also give you att boot screen and sound, or which ever carriers user data you install.

I'm sure it would work to use your carriers csc also and flash in Odin, haven't tried that method on the s8 but I'll give it a try next time I reset.
[Samsung Galaxy S8 Guides, News, & Discussion] fred_yo:
I know some one has the AT&T :user data for the S8...

It was posted for a few hours a while back..but i missed it.. I try to PM the person who has it without luck, it was posted over the root and carrier switch thread...
[Samsung Galaxy S8 Guides, News, & Discussion] Thor2j:
Where do i find att user data?
[Samsung Galaxy S8 Guides, News, & Discussion] louisd:
Anyone who flashed to Tmobile from anything else got digits multi-line working?
[Samsung Galaxy S8 Guides, News, & Discussion] fred_yo:
The user data for the ATT 955u is available.. but the one for the 950u is not... few of us are looking fot that file..
[Samsung Galaxy S8 Guides, News, & Discussion] martylavender:
So if I go unlocked firmware can I flash with the CDC TMB code to get video calling or is this one of the carrier specific features that will not work!?
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
I recommend you change the CSC to "ATT" and flash the T-Mobile Firmware, as both AT&T and T-Mobile use GSM. Make sure you DON'T flash the "USERDATA" file, even if my instructions say so, otherwise you will get T-Mobile bloat.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Flashing T-Mobile firmware from fw.updato.com should give you access to all T-Mobile features, as long as you follow my guide very carefully. If you need to change your CSC, follow the "Carrier Switching" section and then flash. Or just flash by following the "Flashing Standard Firmware" section if your CSC is already set to "TMB".
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Actually, we're looking for the full firmware package/zip.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Changing the CSC to "TMB" on unlocked firmware won't get you access to carrier specific features. You can try flashing T-Mobile "USERDATA" in Odin (in the "UMS" box) on unlocked firmware to get access to those features.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Thanks for your input. There are a lot of things I havemt tried out for myself. But remember that this is the S8 guide I made, not the S8+ one. So your concept works on both devices, but there is no AT&T firmware at the moment for the S8.
[Samsung Galaxy S8 Guides, News, & Discussion] louisd:
I did follow step-by-step. My phone shows TMB/TMB/ATT Video Calling, VoLTE, Wifi Calling all work. The phone has all the TMB bloat. The only thing that doesn't work is the multi-line (Digits) feature. T-Mobile support refuses to help because my IMEI isn't one of their's.

Argh.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Was your phone originally AT&T? (I just realized I restated what I said earlier so I deleted the rest of this reply)
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Did you flash T-Mobile firmware on an AT&T phone?
[Samsung Galaxy S8 Guides, News, & Discussion] louisd:
Yes, that's correct.
[Samsung Galaxy S8 Guides, News, & Discussion] ahh123:
I am a little confused on where to start. I was hoping someone could explain. I have an unlocked/unbranded S8. If I wanted to change to AT&T. Which of the steps do I need to follow, or where do I start on the instructions.
[Samsung Galaxy S8 Guides, News, & Discussion] louisd:
I'm not sure anyone can explain better than the specific, step-by-step guide that's in the first post of this thread.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Follow the "Flashing Standard Firmware section if your CSC is already set to "ATT".
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Did you flash the "USERDATA" file?
[Samsung Galaxy S8 Guides, News, & Discussion] ahh123:
So at the moment it's new out of box. It's should not be set to anything since it's the unbranded version. Would I still follow flashing standard firmware to get at&t branded firmware?. Thanks!
[Samsung Galaxy S8 Guides, News, & Discussion] louisd:
Yes.. In the UMS box. I would assume that's why Video Calling, VoLTE & Wifi calling all work.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
So you have all of those features, but you want T-Mobile Digits. Well, you're going to have to contact T-Mobile to see what they can do. If they decline to help, you're out of luck.
[Samsung Galaxy S8 Guides, News, & Discussion] louisd:
Which is why my original question was whether or not anyone who had converted from another carrier version to TMO had the native S8 digits support working. Finding out if it works for anyone else would help me figure out if I'm just wasting my time.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Easy Method for people on Unlocked Phones: Insert a SIM card of your choice on the unlocked phone so your CSC can change automatically to that carrier (In your case, the CSC should change to "ATT"). Then follow the " Flashing Standard Firmware section, if desired.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
You're welcome to ask around here (even though it's a bit off-topic), but I highly recommend that you start a new thread in the S8 T-Mobile section of XDA and ask if anyone is having problems with T-Mobile Digits after flashing T-Mobile firmware on another carrier-branded phone, such as AT&T. I don't have a T-Mobile SIM card or T-Mobile service, therefore I can't help you.
[Samsung Galaxy S8 Guides, News, & Discussion] dalelindley76:
Can I flash a Vodafone o2 over a ee firmware so I can have latest firmware
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Just wait for your carrier to provide an update. Patience is a virtue.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
You follow the "Carrier Switching" section and then the 'Flashing Standard Firmware" section carefully. You probably messed up on something.
[Samsung Galaxy S8 Guides, News, & Discussion] hellsgods91:
i did it like you said i even tried it 2x o well its all working i shouldnt have any issues lol
[Samsung Galaxy S8 Guides, News, & Discussion] Thor2j:
Where did you get user Data for ATT s8??
[Samsung Galaxy S8 Guides, News, & Discussion] fademaydarkness:
Same I am stuck in xaa/xaa/att. I can't go back to att/att/att. I tried every method flashing stock att aqc9 then factory restore then flashing regular csc & userdata in AP slot. Tried flashing with both odin. Tried flashing combo fw then tried restoring my NV_data via service mode. Tried eng boot then flashing stock... PM everyone for suggestion still no luck.

When I tried restoring with adb update of att aqd9 I got an error but it flashed anyway

Error was

Mount: failed to mount /dev/block/bootdevice/by-name/system at /system:Permission denied
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
1) More importantly, do you have an AT&T SIM card in your phone right now?

2) If everything works, then why would you need to get rid of the "ATT"?

3) I am writing this to let people see if they made any common mistakes. For Carrier Switching, have you flashed the Factory Binary in STANDARD Odin, have you flashed the "HOME_CSC" of the Canadian Firmware in the "CSC" box in PRINCE COMSY's Odin, in the Factory Binary did you change the CSC to "XAC", did you enter this command: "echo "XXX" > /efs/imei/mps_code.dat" in ADB without the quotations surrounding the whole command and replace it with a CSC of choice? For flashing standard firmware, have you flashed the "CSC" file in the "CSC" box in Odin instead of the 'HOME_CSC" file and have flashed the "USERDATA" file in the "UMS" box?
[Samsung Galaxy S8 Guides, News, & Discussion] Thor2j:
I know that the unlocked s8 has all the frequencies for all US carriers. My question is if I flash tmobile firmware and intend to use it on att will it limit the available frequencies as there is no ATT firmware available yet.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
He has an S8+. S8+ users have AT&T stock firmware.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
No, as both carriers use GSM. Therefore, flashing T-Mobile firmware over (whatever) firmware should work. Just make sure you change your CSC to "ATT" first.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Are you on AT&T firmware or unlocked firmware, at the moment?
[Samsung Galaxy S8 Guides, News, & Discussion] Thor2j:
Oh, missed that, thanks.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
No problem.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
You need to activate Developer Settings and enable "USB Debugging". Sorry, I forgot to mention that in the guide. I'll add it to both.
[Samsung Galaxy S8 Guides, News, & Discussion] fademaydarkness:
I am on att firmware now after flashing att aqc9 odin then with adb updates aqd9. But still I'm on xaa/xaa/att. Btw also tried flashing home csc of Canadian firmware then flashing ,installing "XAC" but still it's xaa/xaa/art

But I forgot to mention in recovery it shows I'm on XAC then in settings service provide xaa/xaa/att

Tried flashing with and without att sim card and then after new flashing in setup i put my att sim no luck

---------- Post added at 01:57 PM ---------- Previous post was at 01:49 PM ----------

Yes enabled usb debugging and flashed it works, I can flash everything on my s8+ it can change the bootlader and all. With odin... I email att samsung , no solution. Smart switch won't support g955u att and again forgot to mention I flashed eng boot and combo fw then flashed Canadian home csc then installed xac... further I can't bc it has no root yet. But in recovery it shows xac , & in service provide xaa/xaa/att
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
For you first post, the last three characters are hardwired into your phone. There is no way of removing them. [MENTION=293468]louisd[/MENTION] this applies to you as well.

For your second post, there was no need to flash the eng boot. Wait, how did you get AT&T firmware?
[Samsung Galaxy S8 Guides, News, & Discussion] bricky23:
To get back to ATT/ATT/ATT you just need to change your csc to ATT. The firmware isn't important. Just change csc, and you will have it. But when you flash carrier firmware at the end. Just flash Bl AP CP and non home csc. Nothing else.
[Samsung Galaxy S8 Guides, News, & Discussion] keithnet:
I realized my phone is ATT/ATT/XAA. I've tried to wipe it and reflash it and can't get it to ATT/ATT/ATT.

Any suggestions?
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
The last three characters are hardwired onto your phone. There is no way of changing it.
[Samsung Galaxy S8 Guides, News, & Discussion] keithnet:
Thank you for clearing that up. Haven't seen that explanation anywhere.

Keith
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
No problem. In Download Mode, you'll also see your CSC hardwired there.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
I updated the guide with information regarding the last three characters of the "XXX/XXX/XXX" sequence. Pros and Cons are coming soon. Sorry, it was my birthday today.
[Samsung Galaxy S8 Guides, News, & Discussion] cnote74:
Happy belated birthday
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Thanks, I live in the East Coast of the U.S., and I posted that at around 11:00 p.m on the 29th of June.
[Samsung Galaxy S8 Guides, News, & Discussion] maidguitar:
Used the guide to get to unlocked. Your guide is perfect! Thanks very much!
[Samsung Galaxy S8 Guides, News, & Discussion] Thor2j:
Guide says to remove smart switch from pc before flashing. What's the best way to backup phone if that needs to be removed?
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
You could do a full backup of your phone by using ADB. Search Google on how to do that.

Or you could just backup your phone with your Google Account.
[Samsung Galaxy S8 Guides, News, & Discussion] Thor2j:
Could I do a backup with smart switch, uninstall, flash, then reinstall smart switch to restore?
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
If you want, but that's a bit counterintuitive.
[Samsung Galaxy S8 Guides, News, & Discussion] Thor2j:
So I got a hold of the ATT firmware and I'm going to flash it onto my factory unlocked S8. Do i need to take out my sim card(ATT) before I do it or anything?
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Where did you get it from? I would be grateful if you could share it with the community.
[Samsung Galaxy S8 Guides, News, & Discussion] Thor2j:
I don't mind sharing, I paid $5 for it from that forum. Not sure how to share it.

---------- Post added at 01:47 AM ---------- Previous post was at 01:44 AM ----------

Pm sent
[Samsung Galaxy S8 Guides, News, & Discussion] fabioplata:
My case:

I bought a ATT model, I will use this phone outside of USA, I hope than i can unlock sim with a code bought on Ebay, I want to install a unlocked frimware version becouse I dont want ATT apps and do updates (OTAS). My question is, I need make all process, Carrier Switchin and Flashing Unlocked FW, or only flashing the frimware. in the past I used a ATT phone in my country with out signals problems.
[Samsung Galaxy S8 Guides, News, & Discussion] Thor2j:
Updates are faster on att version then unlocked.
[Samsung Galaxy S8 Guides, News, & Discussion] fabioplata:
But I can't update, because to update I need att sim card, I don't have and I am out of USA. my question is: I need make all process or only flash unlocked firmware