yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S8 Guides, News, & Discussion] QuantaStar:
No carrier code to select on menu

On step 17 (Select XAC) there is no XAC option for me it's just a blank and pressing it results in an error stating "Must be three char".

I have followed every step, except flashing engboot, up until 17 and have reflashed both the binary and HOME_CSC files multiple times.

S8 variant: SM-G950U

Factory binary: COMBINATION_FA70_G950USQU6ASG1_CL13344735_QB24644554_REV00_user_mid_noship_MULTI_CERT.tar.rar

Canadian firmware: HOME_CSC_OYA_G950WOYA6CSG1_CL16197057_QB24631392_REV00_user_low_ship_MULTI_CERT.tar.md5

Could someone please help me.

[IMG="Must be 3 Chars"]https://i.imgur.com/G1h0WIS.png[/IMG]
[Samsung Galaxy S8 Guides, News, & Discussion] GorkaPR:
Is more easy of you unlock you phone to any carrier (SM-G950U) and put any other sim.

I have a S8 for ATT, I unlock the sim, and put a TMO sim, and the phone switch automatically the Binary to TMO. the I put my ATT sim ,and switch back to ATT binary.
[Samsung Galaxy S8 Guides, News, & Discussion] billa:
In order to see the entire list you must be on the unbranded "U1" firmware, which can be brought up by either

*#243203855# in test mode, or by using a shortcut app and executing the task called "preconfig".

At the bottom of the carrier list you should see on option called

"Don't change carrier (for DEV/QA)"

Click it once only, till you see "Enabled! MPS code will NOT be changed..." then Cancel

Which will disable the phone to reconfigure upon inserting any new sim card.
[Samsung Galaxy S8 Guides, News, & Discussion] elliwigy:
that clearly means its not seeing the csc files...
[Samsung Galaxy S8 Guides, News, & Discussion] billa:
In order to see all the different carrier profiles, simply flash it with the unbranded "U1" full stock firmware... tested it and works.
[Samsung Galaxy S8 Guides, News, & Discussion] Paiyne:
I see a lot of posts taking sprint phones to other carriers. I assume it works taking other carriers to Sprint as well?

Sorry if it seems like a noob question. I’ve been away from modding and androids for a long time and just jumping back in. TIA!
[Samsung Galaxy S8 Guides, News, & Discussion] Sinistermache:
I haven't read through all of this, but I want to share an experience I had with this device the Samsung Galaxy s8+ g955uatt model. I got a brand new phone straight from art, and I requested a warranty phone for what I forget, anywhoo this wasn't the best call I ever made nor is it right, I decided to keep both devices and switch carrier.

I went off looking for firmware on sammobile for the device I couldn't find a flash that could work, somewhere on sammobile linked me to another sammobile like websitevwhere I found more firmware I was getting desperate. I was flashing with both modded and unmodded Odin's an eventallly one worked, Odin said pass! I was excited, but I failed to look at the firmware/carrier builds before I flashed, I was reaching all over.

My phone rebooted And i was stuck. I was bricked on both devices, both because I thought I did something wrong on the first and I twerked the flash. I was bricked for 2 weeks searching for firmware for these devices or a way out of the brick. Well I found stock firmware but I didn't flash it, I instead got crafty and flashed the cache and data partitions only with the stock firmware. Boom the first device rebooted and booted up fresh as new. Same with the second. Everything seemed to work except a few bugs.

the Google play protect not checking auto(I deleted data and cache and it worked) caller ID and visual voicemail failing to work correctly ( Samsung pushed out updates eventually and they started working) and say Sprint protect couldn't connect with the servers (still no fix)

but one thing that's always effected me is the spotty mobile data and wifi connections. Always getting dropped connection even when in 3 4 or 5 bars. I just can't figure out how to fix this, so I've been looking for a firmware package to flash the modem/bl partition in a hopes to fix it as I can't find an answer anywhere outside the regular net settings reset app reset factory data reset (lfactory I haven't done as I'm a little paranoid about the outcome with my flashing prior)

the s8+ is by far the worst Samsung I ever owned for what I like to use devices for (custom ROMs, coding, and mobile gaming) but it's all I have and I won't be able to ug any time soon. Can someone shoot me some ideas?

By the way the s8+ I still have left I did get the unlock code from att and I removed the network restrictions. I'm on a Sprint network.

Thanks

Sinistermache
[Samsung Galaxy S8 Guides, News, & Discussion] ben00:
I wonder if anyone can help. This might not be correct forum.

I had an S8 (G950U1) that I purchased directly from Samsung US, and used in Canada with Bell Canada, for the last 2 years. As I only have a data plan, I always utilize the native SIP client, with the stock dialer (set up the settings using QuickShortcut Maker). I have recently purchased the S10e in Canada (G970W) and I have no luck it being able to make an SIP call using the dialer. All the settings the exact same. I assumed it had something do with the fact that it is the Canadian version. I flashed the U1 firmware, from Sammobile, on it, and it is now showing XAA/XAA/XAC under software. Still have no luck using the native SIP client. Does tips mean my phone is fully US version, or is it still the Canadian version, as the last / is XAC.

Would it help to flash the combination files?

Can someone please help, or guide me? I rely on that feature. Thanks.
[Samsung Galaxy S8 Guides, News, & Discussion] puxo:
Man, one question, my s8+, when enter download mode its indicates CARRIER: XAA. But the only time o could take it from boot loop, it show the animation of verizon?
[Samsung Galaxy S8 Guides, News, & Discussion] Runn1ngwolf:
Had anyone tried this outside S8? A21 for example? Or Note 9?
[Samsung Galaxy S8 Guides, News, & Discussion] PNT73:
Hi, first post, tried without asking to many questions but got stuck at #17. In preconfig, ATT is pre-existing at top with no other options available. This is a G892A ATT (u5), I switched to TMB, and during ota phone went inop...(no calls,sms,data,etc.). So I'm trying to do it manually. I used Home_CSC in step #13. Will try straight CSC next if anyone thinks it might help
[Samsung Galaxy S8 Guides, News, & Discussion] dave678:
Just straight up flash the latest Tmobile firmware in modded Odin.
[Samsung Galaxy S8 Guides, News, & Discussion] Rushstrike:
How did you verified this ?
[Samsung Galaxy S8 Guides, News, & Discussion] sirjes:
so does this carrier unlock the phone?

i mean if you change it to verizon, since verizon phones are factory unlocked, would it result in a carrier unlocked phone?
[Samsung Galaxy S8 Guides, News, & Discussion] elliwigy:
we actually found this out days ago in our HO chat trying to find ways to root the device.. one of us has su binaries in the efs partition but so far its useless there lol

---------- Post added at 07:55 PM ---------- Previous post was at 07:54 PM ----------

to add you can flash efs partition with no checks
[Samsung Galaxy S8 Guides, News, & Discussion] Rushstrike:
Many of us cant get write permission to the files here after the engboot :

dreamqltesq:/ $ ls -la /efs/imei/

-rw-rw-r-- 1 radio mps_code.dat

Do you have any advice for getting write ?
[Samsung Galaxy S8 Guides, News, & Discussion] elliwigy:
i am at work until 8:30pm az time before i can try to replicate..

it seems ithers had success too there must be a step ppl are missing..
[Samsung Galaxy S8 Guides, News, & Discussion] Rushstrike:
Ok I am planning to try flashing stock then engoot immediately ( so don't give it a chance to initialize ). May be it may make a difference.
[Samsung Galaxy S8 Guides, News, & Discussion] elliwigy:
im just afraid to break my phone like last time but should be good as long as i stay away from xac firmware lol
[Samsung Galaxy S8 Guides, News, & Discussion] jellomonster54994:
Mine is insured just waiting for the g955u on TMobile and I'll test it
[Samsung Galaxy S8 Guides, News, & Discussion] aybarchu:
Did u tried the XAA firmware?
[Samsung Galaxy S8 Guides, News, & Discussion] unitz0mbie:
I sent the unlock request for my att s8plus, I'm on xac firmware though hope that won't affect anything
[Samsung Galaxy S8 Guides, News, & Discussion] elliwigy:
all the firmware files are xaa lol.. the only difference is userdata..

when flashing xac to stock U firmware it reverts to xaa.. the stock U firmware is xaa its just multi csc so depending on your devices efs (apparently) determines what carrier it registers as..

my issue was i lost cdma bands after coming back from xac so as long as i stay away from xac i should be ok to test.. i onky have verizon service however so cant test other network features but can at least replicate carrier switching or see if i also get permission denied.

also, i had swapped my initial one i messed up for a new s8+ already, my current device i am not going to flash xac to avoid any issues from before lol
[Samsung Galaxy S8 Guides, News, & Discussion] aybarchu:
What about getting XAA/XAA/XAA

Did you tried downloading this? http://bbs.52samsung.com/thread-746036-1-1.html

The download link is: http://pan.baidu.com/share/init?shareid=4164923271&uk=3191148183 pw: es78

I think this is the unbranded firmware we are all looking for
[Samsung Galaxy S8 Guides, News, & Discussion] elliwigy:
lol again, all the firmware are xaa.. for example, going xac then back to stock rom makes it xaa/xaa/vzw... with the ops code you should be able to switch to xaa/xaa/xaa in theory on any firmware as they are all the same minus the userdata which is irrelevant since it only has carrier bloat..

the firmware linked is nothing special and has been around since before they were even released in April.

every U firmware file is the same fir every device except userdata which doesnt even need to be flashed.. every firmware contains multi csc which has csc code for every us carrier so the file linked is irrelevant as we've had it before phone released and its the same lol

question is if anyone has successfully changed to xaa/xaa/xaa using ops instructions? that is what i am going to test later if no one else has been successful
[Samsung Galaxy S8 Guides, News, & Discussion] patt2k:
I didn't have a rooted or modded samsung verizon device for a while. Does Unlocked firmware even exist yet? and is there any progress on this? I read this thread and other but I am little bit confused.

Sorry for noob questions :)
[Samsung Galaxy S8 Guides, News, & Discussion] aybarchu:
Oh great explanation lol. Thanks for the help, Im a little bit lost. One more question, so will be the best option for me to get the phone completely unbranded? Mine one is from TMB, but I have it unlocked and Im outside of the US, using a carrier from my country ( argentina )
[Samsung Galaxy S8 Guides, News, & Discussion] elliwigy:
i am not sure to be honest.. some say going to xac then back removes bloat.. i wouldnt suggest it however..

i have verizon in the usa and going xac n back messed up my cdma networks lol i havent messed with it since
[Samsung Galaxy S8 Guides, News, & Discussion] jellomonster54994:
i had flashed an at&t firmware a couple of days ago then flashed back tmobiles firmware and now that i put a sprint sim card its asking me to input network unlock code?? whats going on
[Samsung Galaxy S8 Guides, News, & Discussion] twister082179:
I am on XAA\XAA\TMB how do I get back to stock?
[Samsung Galaxy S8 Guides, News, & Discussion] jellomonster54994:
i flashed the stock firmware i got from androidfilehost just search g955u and you should see the tmobile one i flashed everything but the userdata
[Samsung Galaxy S8 Guides, News, & Discussion] twister082179:
ok, thanks. I use the original odin right? not prince-comsy?
[Samsung Galaxy S8 Guides, News, & Discussion] jellomonster54994:
i used prince just incase or patched one
[Samsung Galaxy S8 Guides, News, & Discussion] mweinbach:
Does anyone know what upload mode is? I just got into it. I was super curious.
[Samsung Galaxy S8 Guides, News, & Discussion] twister082179:
which csc did you use, normal or home?
[Samsung Galaxy S8 Guides, News, & Discussion] jellomonster54994:
i used home but ive noticed that either or works
[Samsung Galaxy S8 Guides, News, & Discussion] twister082179:
thanks a lot been very helpful
[Samsung Galaxy S8 Guides, News, & Discussion] aybarchu:
Hey! Why do you want to go back to stock? Isnt some improvements by getting xaa xaa tmb? Also, can you explain me what did you do to get there? you flashed the XAC firmware?
[Samsung Galaxy S8 Guides, News, & Discussion] Rushstrike:
Ok good news everyone. After hours of experimenting [MENTION=7277512]mweinbach[/MENTION] and I finally got it to work to switch that mps_code.dat with write permssion so you can edit any carrier:

1. Download and install factory image: https://xdaforums.com/galaxy-s8/how-to/rd-carrier-switch-root-snapdragon-t3597473

(not sure if required) I flashed the eng boot which brings the build date from January 2017 to april 28th I am not sure if this step is needed

2. After it boots restart back to download mode: Install a home_csc only (this will give you the option to choose other carriers from the IMEI factory dialer. Other wise you only get 1 choice your original carrier)

3. Launch IMEI factory dialer and put in code ( *#243203855#). FYI I got a kernel crash after launching the IMEI dialer the first time but after restarting it works.

4. Choose your carrier of choice and restart it will update mps_code.dat and omcnw_code.dat automatically.

5. Do a full firmware update to load your normal firmware and clear out the factory binary

Doing step #4 will change file permission:

drwxrwxr-x 2 root radio 4096 2017-01-01 07:10 .

drwxrwx--x 22 radio system 4096 2017-02-16 07:34 ..

-rwxrwxrwx 1 radio system 3 2017-01-01 07:10 mps_code.dat

-rwxrwxrwx 1 radio system 3 2017-01-01 07:10 omcnw_code.dat

-rwxrwxr-x 1 radio radio 14 2017-01-01 08:27 prodcode.dat

-rw------- 1 system system 0 2017-01-01 07:10 salesCodeChanged

So now mine has write and read to mps_code.dat and prior did not! Now I can flash my carrier of choice yay!! Thanks all who have helped.
[Samsung Galaxy S8 Guides, News, & Discussion] guaneet:
i see improvement on my side, no t mobile bloat which can cause battery drain and i got all the features of a tmobile rom(VoLTE, wifi calling)

only thing id be worried about now is being up to date with software updates. we havent had an update yet, so we dont know if we are stuck or have to wait extra long because we're on the XAA firmware
[Samsung Galaxy S8 Guides, News, & Discussion] mrfuzzie23:
what carrier did you start on? did u lose whatever bloat came from your original carrier in the process?
[Samsung Galaxy S8 Guides, News, & Discussion] NEMES|S:
That's really great news! Thank You!

Now the question is...

- Can we go from TMO to Verizon and our phone will be sim unlocked? (since Verizon does not sim-lock the phones) If it works... I guess I will have to stay with Verizon Firmware in order to keep the sim-unlock...? lol

- or... Can we go from TMO to Sprint... unlock the sim with the current Z3X box method and then go back to TMO and it will stay sim-unlocked...?
[Samsung Galaxy S8 Guides, News, & Discussion] elliwigy:
i do not believe so.. you will still have same imei.. probably still need to unlock using their app or with the code on other carriers.. it just switches firmware and csc i imagine

---------- Post added at 05:52 AM ---------- Previous post was at 05:51 AM ----------

you could try switch to sprint then use their unlock method.. who knows until someone tries it haha
[Samsung Galaxy S8 Guides, News, & Discussion] aybarchu:
Could you go back to stock with those steps?
[Samsung Galaxy S8 Guides, News, & Discussion] jellomonster54994:
what about for g955u? the s8+ any update yet on how to or which eng boot to flash??
[Samsung Galaxy S8 Guides, News, & Discussion] Rushstrike:
AT&T unlocked (used code sent from AT&T unlock service since i paid in full). Once I flashed verizon all at&T bloat disappearead and I got verizon bloatware instead.
[Samsung Galaxy S8 Guides, News, & Discussion] elliwigy:
I am having the worst of trouble.. I restarted my phone (100% stock new phone verizon no changes or anything at all done to it) and I got stuck in a boot loop lmao!

It would go to blue screen android is updating to black screen with a bunch of white text with fails across the board..

I flashed stock firmware and there was no SW version at all.. no vzw/vzw/vzw.. no sending sms.. I added vzw apns and rebooted to no avail.. flashing combo firm now and going to try carrier switch method so wish me luck.. Can't believe all I did was reboot and got stuck in boot loop.. initially flashing combo firm would only boot into kernal panic upload mode.. hoping I can figure it out...

---------- Post added at 10:57 AM ---------- Previous post was at 10:24 AM ----------

An update.. I odined stock U firmware.. booted into phone.. still no SW codes.. to download mode and flashed vzw userdata in ap slot and home csc in csc slot.. booted back up and everything is perfect no bloat and no SW version!

---------- Post added at 11:02 AM ---------- Previous post was at 10:57 AM ----------

nvm it does in fact say XAA/VZW/VZW... either way everything is working and 0 bloat! so those vzw users who went xac and cant send sms there is hope! i flashed dif. firmwares 20 times, resets, dif. csc files etc. so i cant say what officially did it lol but it works and thats what matters! i will not be using ops code because i dont want vzw boot or bloat..

odd of course how i flashed userdata and still no vzw bloat.. maybe that is what made it work back on cdma?? maybe userdata isnt just carrier bloat apps.. who knows lol
[Samsung Galaxy S8 Guides, News, & Discussion] raduque:
Thank you for this! Great work!

So, think this can be used to switch to the US Unlocked firmware?

Do you have Samsung Cloud, "Identify Unsaved Callers" in the phone settings, and Device Maintenance?
[Samsung Galaxy S8 Guides, News, & Discussion] bsharp8:
After flashing the home_csc the phone app keeps constantly crashing and I cant enter the code in the dialer. Any suggestions? Thanks.
[Samsung Galaxy S8 Guides, News, & Discussion] Rushstrike:
One other user had this problem too. I just told him that prior to experimenting this . I did do a full flash using the Verizon firmware including userdata in the ums slot. I used odin 3.12.7
[Samsung Galaxy S8 Guides, News, & Discussion] bsharp8:
Okay I'll try that. Thanks.
[Samsung Galaxy S8 Guides, News, & Discussion] Rushstrike:
I just tried changing my phone to XAA.

I went from verizon to flashing factory image + home_CSC. It boots up with verizon image then once loaded I started the factory app dialer *#243203855# and choose XAA . Then flash back the USC firmware from https://www.sammobile.com/firmwares/galaxy-s8/SM-G950U/USC/download/G950USQU1AQDE/130849/ (I wanted to try the XAA firmware but it takes too long to download at 10kb/sec from http://pan.baidu.com/share/link?shareid=4164923271&uk=3191148183) . On my first boot it says user data corurpt so I hit restart and it does the blue android logo "erasing". Then after that it restarts without any carrier logo but the white samsung logo and it works just fine. System shows as XAA/XAA/ATT without any bloatware. I think the segment shows "ATT" from /efs/imei/productcode.dat which the *#243203855# doesn't change when you switch carrier.

*Update* I am experiencing text messaging issue that other Verizon users experienced when flashing to the Canadia fw with XAA. I believe it is due to the APN settings not initializing correctly . I will try to fix this later today. I may have to do XAA/VZW instead of XAA/XAA

I think the first segment determines your carrier software and boot logo. The 2nd segment I think determines the radio settings. Then the 3rd segment is your model product code which I think doesn't do anything but just for info and I have never been able to change it.
[Samsung Galaxy S8 Guides, News, & Discussion] mweinbach:
have you gotten it to work yet?
[Samsung Galaxy S8 Guides, News, & Discussion] gqukyo:
Anyone try Rushstrike's instructions w/o flashing the engboot?
[Samsung Galaxy S8 Guides, News, & Discussion] bsharp8:
No sir. I have tried everything I can think of.
[Samsung Galaxy S8 Guides, News, & Discussion] Rushstrike:
Are both of your phones unlocked ? Trying to find what's common between you 2 that causes the dialer to not work for you. I assumed you have tried using the other CSC besides the Home one right ?
[Samsung Galaxy S8 Guides, News, & Discussion] Quickvic30:
I had force close of the dialer also a few times after I was on XAC and then tried flashing ATT csc. I eventually had to revert back to XAC csc to get it working again.

Don't remember how I did it but now I'm on XAA/XAA/ATT and everything works and you can actually delete/uninstall all the bloatware. Seems a little laggy though compared to XAC firmware forsome reason.
[Samsung Galaxy S8 Guides, News, & Discussion] Rushstrike:
Your phone is originally AT&T right ? Just.trying to confirm the 3 segment id identifier.and what it means
[Samsung Galaxy S8 Guides, News, & Discussion] Quickvic30:
That is correct sir
[Samsung Galaxy S8 Guides, News, & Discussion] bsharp8:
Mine isn't unlocked. I tried a couple different home_csc's and a couple non home_csc's to no avail. When I flash the combo tar then flash the eng boot it gives me a list of different country codes to choose from but they appear to all be Canadian.

---------- Post added at 04:48 PM ---------- Previous post was at 04:22 PM ----------

Scratch that. That was after flashing the Canadian csc. I'm losing track of what I'm flashing lol.
[Samsung Galaxy S8 Guides, News, & Discussion] jellomonster54994:
Can someone help me change to Sprint firmware I currently have TMobile firmware stock but want to see if I can I can unlock it using z3x I have the s8+
[Samsung Galaxy S8 Guides, News, & Discussion] gqukyo:
I'm having the same issue w/ the phone app crashes and the periodic vibrations. Tried both a CSC and a Home CSC. I did not flash the engboot though. Don't even know how to do that... lol
[Samsung Galaxy S8 Guides, News, & Discussion] Ph3n0x:
if you use cdma workshop you may be able to edit the product code i will try and post my results.
[Samsung Galaxy S8 Guides, News, & Discussion] bsharp8:
I tried with and without the eng boot with same results.
[Samsung Galaxy S8 Guides, News, & Discussion] mweinbach:
which firmware did you start on?
[Samsung Galaxy S8 Guides, News, & Discussion] bsharp8:
I have a T-mobile phone then flashed the xac and the tmobile and got to xac/xac/tmb. I flashed the tmobile firmware clean before trying this.
[Samsung Galaxy S8 Guides, News, & Discussion] mweinbach:
I am on T-Mobile right now also. Interesting.
[Samsung Galaxy S8 Guides, News, & Discussion] bsharp8:
Which home_csc did you flash?
[Samsung Galaxy S8 Guides, News, & Discussion] mweinbach:
Verizon and T-Mobile of the latest for both. I am going to try sprint next. Then the Home_csc. Does anyone have the password for the JUSMEJOSE zip?
[Samsung Galaxy S8 Guides, News, & Discussion] Rushstrike:
XAA/VZW/*** is indeed the best settings for verizon. When I was on XAA/XAA/ATT it doesn't work with text messaging on verizon but phone and internet works. I think the first XAA means no bloat ware, the 2nd segment means the radio settings so I think for verizon without VZW in there the XAA doesn't know how to properly initialize for verizon apn settings. The last code doesn't matter is the stock origin of your phone based on the hardware identifer model I believe...I am going for XAA/VZW/ATT now lol

PS. I am getting the IMEI dialer crashign like the rest of you guys now after several flash trying to get verizon sms to work but luckily I got it to work once so I still have write permission to those files so I can still edit them using adb shell. I tried several method to get rid of it but no luck :(
[Samsung Galaxy S8 Guides, News, & Discussion] elliwigy:
unless i am missing something only device maintenance is in settings..

Edit: after going through settings i saw an option for cloud, signed in a synced everything