yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S8 Guides, News, & Discussion] Rally517:
I wanna change carriers. Cause my reception isn't good here. When I was on AT&T I changed to Verizon cause the speeds are faster. But I would have to change apn to get mms working, picture mail. And I wanted boost firmware to always be able to go back.

We could flash thru odin. S7edge.

It kinda seen the same here but I was thrown off and switching sim cards never did that
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
So, you want to change your CSC so you can flash Verizon firmware; am I correct? Then, why would you need Boost Mobile firmware? I have provided AT&T firmware in the "Downloads" section of my guide.
[Samsung Galaxy S8 Guides, News, & Discussion] Rally517:
Just so I could boo back to boost case something went wrong. I just wanna have all angles covered before I flash anything. So it is basically like how it was done with the s7edge? I can flash different locked firmware as well? I just went everything working. Sorry for all the questions
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Wait, I'm confused. Are you currently on AT&T or Boost Mobile?

Anyways, first make sure your phone is not locked by your carrier (SIM card locking). Then, follow the "Carrier Switching" section so you can change your CSC code (thereby allowing you to use a different carrier's firmware). Finally, follow the "Flashing Standard Firmware" section so you can flash your desired firmware. Before you do anything, make sure you follow the "Prerequisites for anything you decide to do in this guide (Required)" section. Enjoy!

Note: It's not as easy as flashing the S7.
[Samsung Galaxy S8 Guides, News, & Discussion] Rally517:
I'm on boost mobile. And I don't think it's sim locked. It's prepaid and the phone is fully paid for. How can I find out.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
--snip-- (Look below)
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Actually, you can try putting in a SIM card from another carrier and see if your phone prompts you with an unlock code. If it does, then you'll have to call Boost Mobile and see if they can unlock it for you.

My bad.
[Samsung Galaxy S8 Guides, News, & Discussion] Rally517:
I appreciate this much help. I love xda but sometimes members make it hard. Your a gentleman and a scholar. And with me being inUS do I still flash Canadian firmware once I figure out of in locked or not
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
I'm glad that I'm able to help you.

For your question, yes, during one of the steps from the "Carrier Switching" section, you are required to flash a specific file from the Canadian firmware through Odin (the "HOME_CSC" file). Just make sure you follow everything carefully, and you should be good.
[Samsung Galaxy S8 Guides, News, & Discussion] Rally517:
And hopefully this is lady question smh. So if I wanna go back to boost jyst flash file you have me correct. And do I have to adjust anything to get picture maid to work once I switch?

---------- Post added at 11:37 PM ---------- Previous post was at 11:33 PM ----------

crazy how much flashing changed since my prevail days lol
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
If you would like to go back to Boost Mobile, after you have changed your CSC code (by following the "Carrier Switching" section) and firmware: follow the "Carrier Switching" section once again so you can change your CSC code back to "BST". Then, follow the "Flashing Standard Firmware" section so you can flash the firmware I gave you earlier (the Boost Mobile one).

I don't know what "picture maid" is.
[Samsung Galaxy S8 Guides, News, & Discussion] Rally517:
Great think I'm good. On what to do. Time to call boost. Damn got another one lol. If they don't unlock it hours would I? Cause I thought this method did unlock the phone
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
If Boost Mobile refuses to unlock your phone, then you'll have to find a third party service that can do it for you.

This guide doesn't unlock your phone for use with other carriers.
[Samsung Galaxy S8 Guides, News, & Discussion] t12icky0:
Is there a cricket wireless userdata file? I'm using the AT&T version userdata and getting all features for cricket but wanted to do the new update and don't want to lose the volte.
[Samsung Galaxy S8 Guides, News, & Discussion] C3cars:
FAIL! (DeviceInfo)

I want to flash the T-Mobile firmware onto the Unlocked G950u1, to obtain the 256qam, Mimo, and 4x4 radio.

I used the firmware G950u T-Mobile, and followed the Flash Standard firmware instructions and I receive the FAIL! (DeviceInfo) error. I deleted my Google Account, and replaced the USM/PATCH to 1. My CSC is TMB, verified by checking the "firmware is being upgraded" black screen.

I've searched this post for this particular error, and I cannot find a similar issue.

Anyone have this issue and resolved it?
[Samsung Galaxy S8 Guides, News, & Discussion] qteezy2015:
I just got done rooting my phone after I changed over to Att firmware from US Cellular.. I now want to go over to TMobile.. do I have to do this whole process again? Or can I just put the TMobile 4 firmware files in Odin and flash it that way? I don't care if I lose root.
[Samsung Galaxy S8 Guides, News, & Discussion] C3cars:
Help

Can you please provide steps on how you did this.

I have the G950u1 and when I attempted to flash the 950U T-Mobile firmware, I got the error DeviceInfo using both Odin, and Prince Odin.
[Samsung Galaxy S8 Guides, News, & Discussion] C3cars:
I discovered my issue regarding the DeviceInfo Error.....After installing the Drivers, I rebooted my PC and used a different port on the PC. This lead to a proper install.

So to recap, anyone with the G950u1 looking to flash to T-Mobile for the 256qam, Mimo, and 4x4 radio, download the G950u Firmware, flash using the standard method. Your CSC will be automatically applied when you insert your SIM card into the phone while your on firmware G950u1. Make sure to check the CSC via the information provided in the first post.

Just did a T-Mobile OTA update and it was successful.
[Samsung Galaxy S8 Guides, News, & Discussion] tytydraco:
Does this pass safetynet? Also OTA is still fully functional?
[Samsung Galaxy S8 Guides, News, & Discussion] C3cars:
Okay....another issue arises, I am at TMB/TMB/XAA

I followed the OP word for word used the Carrier Switch section, followed by the Standard Flash and I can't get the XAA to TMB.

Nevermind, its hardwired into the device.

All is good.

---------- Post added at 10:02 PM ---------- Previous post was at 09:54 PM ----------

How would I test Safetynet? If You're talking about Knox Secure Folder, yes it still works.

Yes, OTA updates from T-Mobile does work.
[Samsung Galaxy S8 Guides, News, & Discussion] tytydraco:
Perfect thanks. Considering it but thinking about if it's worth it to lose volte with calling and virtual voicemsil
[Samsung Galaxy S8 Guides, News, & Discussion] C3cars:
Well....I flashed back to the original unlocked G950U1 firmware after using T-Mobile G950u for two days. I don't like LookOut always running, and I miss the CallerID feature. The major problem I encountered was that I couldn't get Network Guru to work and show me if I was using Mino 4x4 band antenna. Meh....
[Samsung Galaxy S8 Guides, News, & Discussion] NexusS4gFreak:
Is flashing TracFone s8 to verizon possible?
[Samsung Galaxy S8 Guides, News, & Discussion] themuffinman:
How does this work exactly and wouldn't they know that it's an IMEI from a different device than what I have activated?
[Samsung Galaxy S8 Guides, News, & Discussion] C3cars:
I am going to go off the limb and suggest that flashing the 950u T-Mobile Firmware doesn't give us the 4x4 MiMo Radio and 256QAM. I've not seen a difference in call quality, data speed, or signal strength. Can anyone let the community know what the three TMB/TMB/XAA mean?
[Samsung Galaxy S8 Guides, News, & Discussion] qteezy2015:
I don't believe flashing this firmware will give you those features unless you actually have TMobile and a TMobile Sim card or use a carrier that have these feature? I have a different carrier and flashed TMobile firmware and the wifi calling is blanked out and no volte..
[Samsung Galaxy S8 Guides, News, & Discussion] C3cars:
I am a T-Mobile subscriber and I'm using the S8 Unlocked G950u1 model.
[Samsung Galaxy S8 Guides, News, & Discussion] qteezy2015:
My apologies.. I'm not sure why then. I would like to know as well.
[Samsung Galaxy S8 Guides, News, & Discussion] Charkatak:
I flashed my US Unlocked S8 yesterday with T-Mobile's firmware and really didn't see any difference in network speed or its quality. I may need to be around some special cell towers to take advantage of some features. My phone shows TMB/TMB/XAA. Should the last part(XAA) be changed to TMB as well?
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
The last three characters of that sequence are hard-wired onto your phone. There's no way to change them. You have successfully flashed T-Mobile firmware onto your unlocked phone, however.
[Samsung Galaxy S8 Guides, News, & Discussion] themuffinman:
In case you missed it, please see my post above about the IMEI.
[Samsung Galaxy S8 Guides, News, & Discussion] Thor2j:
They apparently don't care. Just need a number to make system work.
[Samsung Galaxy S8 Guides, News, & Discussion] Aruku:
I have a question...

If I change the CSC from AT&T to XAA to get rid of everything related to the carrier, will I be able to use VoLTE somehow?

(The phone was unbranded before I rooted it.)

Also, by standard firmware do you mean stock and/or branded (as opposed to unlocked/unbranded)?
[Samsung Galaxy S8 Guides, News, & Discussion] r_BG:
Great guide. Could you please explain the difference between the standard firmware and unlocked firmware?
[Samsung Galaxy S8 Guides, News, & Discussion] ad78:
here's the latest

http://updato.com/firmware-archive-select-model?record=315444A78DDE11E7963AFA163EE8F90B
[Samsung Galaxy S8 Guides, News, & Discussion] nigel21x:
Hi. So, I bought an unlocked S8 directly from Samsung trying to avoid all the bloatware and got on Verizon network. After a few weeks of use, I finally noticed that I am not able to to use data connection while I am in call (without wifi). I can put up with not having VVM, but not having internet connection is a deal breaker. It is too late for me to exchange my phone, so I am trying to flash my SM-G950U1 to a Verizon version so that I can be able to fully utilize the Verizon network. I do not care if I get bloatware because not having internet connection while on a phone call does not work for me.

I have flashed the "Verizon SM-G950U1" on my phone, but all that does is factory resets my phone and no full Verizon features. Am I supposed to download and flash the "Verizon SM-G950U" on my phone to get what I need?
[Samsung Galaxy S8 Guides, News, & Discussion] charlieporth1:
Help I enabled oem unlock while in Factory binary and I cant reboot or flash anything

Help I enabled oem unlock while in Factory binary and I cant reboot or flash anything
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
How come you can't reboot? Try typing in "adb reboot bootloader" in command prompt (make sure you change the directory to the folder where adb is located) to enter Download Mode.
[Samsung Galaxy S8 Guides, News, & Discussion] charlieporth1:
I cant get passed the Powered by android logo and I cant get into recovery mode
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Hold the Volume Down button and Power button for around eight seconds. Then, once you feel your S8 vibrate (which means it has rebooted), start holding the Bixby button, in addition to the Volume Down and Power buttons you're already holding. You should see a blue screen. Press the Volume Up key to enter Download Mode.

If this doesn't work, could you give me a brief, but detailed explanation of what you were trying to do?
[Samsung Galaxy S8 Guides, News, & Discussion] charlieporth1:
the problem is that flashing fails

this is odin output

<ID:0/004> Removed!!

<ID:0/004> Added!!

<ID:0/004> Removed!!

<ID:0/004> Added!!

<ID:0/004> Removed!!

<ID:0/004> Added!!

<ID:0/004> Removed!!

<ID:0/004> Added!!

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<ID:0/004> Odin engine v(ID:3.1203)..

<ID:0/004> File analysis..

<ID:0/004> SetupConnection..

<OSM> All threads completed. (succeed 0 / failed 1)

<ID:0/004> Removed!!
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Are you using using Prince Comsy Odin or standard Odin? Also, what are you trying to flash?
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
As I have to go (and get some sleep), I'll leave you with some suggestions:

Try reinstalling the Samsung drivers.

Try using a different USB port on your computer.

Try using a different USB cable.
[Samsung Galaxy S8 Guides, News, & Discussion] fabioplata:
Which carrier firmware is better? differences between then?
[Samsung Galaxy S8 Guides, News, & Discussion] keithnet:
This guide is great! Thank you for putting it together!

Any one know where to get the AT&T Standard Firmware? I have a G950-U1 and really want the carrier AT&T firmware (so I can get wifi calling).
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Thanks. Yeah, I forgot to mention that. As long as you don't use them, you're good.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
No problem. It's all at: http://fw.updato.com.
[Samsung Galaxy S8 Guides, News, & Discussion] keithnet:
Honestly struggling to find the AT&T carrier firmware for the S8 there. I've found the U1 firmware, but that doesn't have the carrier "bloat" that will help me with wifi calling.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Oh, you're right. It's not there. *The link I previously had didn't work*
[Samsung Galaxy S8 Guides, News, & Discussion] ernestico911:
Let me ask you a question, if my device is t-mobile example SM-G955U TMB, I change carrier to SPR, me device will be locked to Sprint network and will work with sprint SIM card?

My device is locked for T-Mobile only
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
It depends if T-Mobile, SIM locked your phone. If they did, you would not be able to use a Sprint SIM card on Sprint firmware. Try looking at T-Mobile's website to see if they can unlock your SIM card for free.
[Samsung Galaxy S8 Guides, News, & Discussion] ernestico911:
Yes sir my device is locked only for t-mobile and they will not unlock my phone for free till wait one year, then if I flash a unlocked firmware, I read that this will not unlock my device right?
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Yes, this will NOT unlock your phone.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
I'm trying to find it for you.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
THIS POST IS NOW NOT NEEDED: FIND THE AT&T FIRMWARE IN THE "DOWNLOADS" SECTION OF THE GUIDE.

Original Post: Through concise research, I have determined that using the T-Mobile firmware will work on your ATT S8. Here is a direct link to the firmware: http://updato.com/firmware-archive-select-model?record=72ABC59C4BE811E7963AFA163EE8F90B. Your CSC must be set to ATT though. It probably is, but you can check by using the instructions in the introduction.
[Samsung Galaxy S8 Guides, News, & Discussion] nocloo:
Question:

I bought an unlocked version S8 SM-G950UZKAXAA and need to carrier flash to Verizon. Tried to activate on Verizon, LTE works, Phone works .. SMS didn't and they told me it's not a Verizon version.

So if I follow the instructions on carrier switching. I just need to Flash the Factory Binary, The Canadian FW then I'm done or on step (36) I need to flash the unlocked firmware again ?

Thanks ! Just want to make sure I don't mess up my new phone..
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
Make sure your following my guide, but here's a summary of what you need to do: Flash the Factory Binary, Flash the "HOME_CSC of the Canadian firmware, Input a series of numbers on your phone, type in an ADB command, then flash the firmware of your choice. Step 36 tells you to follow the "Flashing Standard Firmware" section or the "Flashing Unlocked Firmware" section. You're obviously going to want to follow the "Flashing Standard Firmware" section after you follow the "Changing Carrier's section.
[Samsung Galaxy S8 Guides, News, & Discussion] nocloo:
Thank you for your quick reply. I was hoping to use the unlocked firmware to save the bloatware of the carrier version. But I guess I've to use the carrier firmware to enable all options for that carrier.
[Samsung Galaxy S8 Guides, News, & Discussion] Mike15678:
No problem. Enjoy!
[Samsung Galaxy S8 Guides, News, & Discussion] DevalB:
I would use the specific one for your SIM, unless you're switching carriers often. I used the unlocked firmware with my Verizon SIM .
[Samsung Galaxy S8 Guides, News, & Discussion] fabioplata:
I bought a AT&T version, but I will use outside of USA, ATT dont allow update without their sim, so I want to change the firmware, which one you recommend me?

Thanks
[Samsung Galaxy S8 Guides, News, & Discussion] bricky23:
Unlocked U1 firmware would be best for you. The only reason I don't use it, is so that I can have volte on cricket. And you will get updates.
[Samsung Galaxy S8 Guides, News, & Discussion] keithnet:
That worked great!!! Thank you!

Any tips on how to get software updates in the future (without losing my data)?

-Keith
[Samsung Galaxy S8 Guides, News, & Discussion] FTMDan:
Hi,

Just a quick question. Would I be able to flash the H3G firmware to my UK S8 without it wiping the phone or is a system wipe inevitable? I want to flash the Three specific firmware so I can get the 4G Supervoice and WiFi Calling features.

Thanks!
[Samsung Galaxy S8 Guides, News, & Discussion] dinopeyton:
i am on boost mobile (csc bst) can I change csc and still be on boost mobile?
[Samsung Galaxy S8 Guides, News, & Discussion] Guerde:
Would it be possible to flash the unlocked firmware (bloat free) and flash a GLB (Philippine network) csc? local variants here use the exynos version, but I got a snapdragon.

update: so I went ahead and flashed the XAA version but my service provider sw ver turned out:

//ATT

Now, my settings app is messed up and my phone won't register for OTA updates(I flashed the july XAA firmware). What should I do to fix this? Thanks
[Samsung Galaxy S8 Guides, News, & Discussion] lickwid:
Hi Mike15678, I currently have an unlocked Galaxy S8, purchased directly from Samsung. I am trying to get it working on Xfinity Mobile. I followed you guide to the T, first did the Prerequisites, then Carrier Switching to switch the CSC to CCT, then lastly the Flashing Standard Firmware, in which I flashed the latest CCT firmware. Everything boots up fine and all the Xfinity Mobile apps are there. I pop in the Xfinity Mobile sim and it doesn't want to provision or connect to a mobile network.

Another thing, when I go to About Phone, mine is still listed as XAA/XAA/XAA, or I go into download mode, and at the top it still lists "CARRIER: XAA". Not sure why nothing refers to CCT as flashed in the Carrier Switching above.

Thank you for putting together an easy to follow guide.

UPDATE: So I went back to re-try everything, and it looks like the ADB command "echo "XXX" > /efs/imei/mps_code.dat" did not stick, as there is no write permission. Am I missing a step to enable USB debugging?

Yes, so that was it. I think the OP should add that step, as I usually have it enabled, but I did a factory reset prior to starting this whole process. I'm up and running. Thanks OP.
[Samsung Galaxy S8 Guides, News, & Discussion] vo_danh:
I'm trying to do the same thing since I need verizon features. I found the G950U1UEU1AQDC_7.0_ALL_XAA but its a 2GB+ file, vs the 950U version on the carrier switch thread thats only 30MB. Let me know if you figure it out lol.
[Samsung Galaxy S8 Guides, News, & Discussion] samurai4k:
I have an unlocked S8 and want to flash AT&T firmware. Should I use "Flashing Standard Firmware" guide?

---------- Post added at 06:05 AM ---------- Previous post was at 05:12 AM ----------

I'm a little confused about which PDA I can choose. I have an unlocked S8 with a Baseband Version G950U1UEU1AQH3. If I want to flash an ATT firmware, should I look for "G950U1UEU1AQH3" when searching for one at updato.com? I downloaded 2 of with this version but both didn't have USERDATA file. Thanks
[Samsung Galaxy S8 Guides, News, & Discussion] stmims1124:
You have to download the the G950U AT&T firmware, not the G959U1. I don't even understand why they even post U1 versions with carrier specific/region CSCs. Download this regular U AT&T firmware, not U1, an be you'll find what you've been looking for with the userdata file included. That being said, you'll need to open the .ini file included with your version of Odin and open it with a text editor- in the text editor scroll down to where it says UMS=0, and edit it so it now says UMS=1. This will unlock the option to flash the userdata file, of course in the UMS field
[Samsung Galaxy S8 Guides, News, & Discussion] farhanm:
I recently got a verizon S8 that i am using on AT&T right now. Calls, data stuff is working but i am having trouble setting up visual voice mail. anyways I want to get rid of Verizon bloatware and trade it with At&t bloatware. As I understand, I just need to follow the first two parts of the guide and don't need to go for the third part as I am not looking for unlocked firmware.

Thanks

--

Farhan
[Samsung Galaxy S8 Guides, News, & Discussion] vo_danh:
Right. Would the U1 say VWZ be unlocked fw with no VWZ bloat but have VWZ features like wifi calling? Otherwise it would be pointless and shouldn't even say VWZ on it for U1...
[Samsung Galaxy S8 Guides, News, & Discussion] vo_danh:
I've successully went from 950U1 unlocked to 950U verizon because I needed wifi calling and 3g. This guide was the most complete and straight forward.

My unlocked phone was purchased directly from samsung and it's CSC code was already VWZ so all I did was run the latest Odin, and the 950U VWZ latest FW image from updato. I thought there was a way to be on the unlocked FW 950U1 and somehow get wifi calling because some people were saying it could be done but it was just the carrier changing (the CSC) so even if you change it to VWZ it still doesn't give you the verizon only features. You have to be on the verizon 950U version. I walked my friend through the same step since we bought the same phone at the same time and he also had success. It's as easy as it was on the S7 to swap between FW for different carriers.
[Samsung Galaxy S8 Guides, News, & Discussion] nigel21x:
Hi. Were you able to get Verizon Visual Voicemail as well?
[Samsung Galaxy S8 Guides, News, & Discussion] GrandMstrBud:
Is there a faster mirror for the Canadian firmware?
[Samsung Galaxy S8 Guides, News, & Discussion] Holleman67:
Good evening,

I recently bought a Sprint S8 and wanted to change it over to Verizon. When adding my SIM, it would state invalid SIM. I confirmed with Sprint this phone was unlocked from the plan it was on and they said I should be good to go with any other carrier. In my original thread someone linked me here stating maybe I need to flash it. I ended up flashing the g950u1 as I figured that would unlock everything. The flash was successful and was super easy (thanks OP for the hard work here) but when adding my verizon SIM again, it still states invalid SIM. Any advice would be awesome.

thanks in advance!!
[Samsung Galaxy S8 Guides, News, & Discussion] Nessism:
I'm curious about this too. I just flashed from U1 to U for VWZ because I couldn't send messages on Boom Mobile Red. Now I've got the VWZ bloteware. Guess I should just try the other ROM and see what happens? :confused:

BWT, big public shoutout to Mike for his guide! Love it. I'm a hack but was able to geterdone.