Unlocked SM-G955U - Samsung Galaxy S8+ Questions & Answers

Last year's S7/S7edge had a different model number for each carrier (G935A/T/V/P/R4), but this year they all seem to be using the 955U model with different CSCs for each carrier.
I noticed on SamMobile there's an unbranded firmware available for the G955U with the XAS CSC, what CSC is that? Generic?
The reason I ask this is that because these US variant phones get imported to Pakistan and some people buy them since they're cheaper than the officially sold G955F models here, so if a G955U gets imported here which for example was previously used on T-Mobile in the USA, if one flashes the XAS ROM, will it basically be an unbranded Snapdragon 835 S8+ or is removing the carriers CSC not possible?
All replies will be appreciated.
Cheers

murtaza02 said:
Last year's S7/S7edge had a different model number for each carrier (G935A/T/V/P/R4), but this year they all seem to be using the 955U model with different CSCs for each carrier.
I noticed on SamMobile there's an unbranded firmware available for the G955U with the XAS CSC, what CSC is that? Generic?
The reason I ask this is that because these US variant phones get imported to Pakistan and some people buy them since they're cheaper than the officially sold G955F models here, so if a G955U gets imported here which for example was previously used on T-Mobile in the USA, if one flashes the XAS ROM, will it basically be an unbranded Snapdragon 835 S8+ or is removing the carriers CSC not possible?
All replies will be appreciated.
Cheers
Click to expand...
Click to collapse
The U version is locked and not able to root. It's used by all USA carriers and they probably made it locked down due to Samsung pay. At some point a root crack will surface but it probably won't be stable

photolarry said:
The U version is locked and not able to root. It's used by all USA carriers and they probably made it locked down due to Samsung pay. At some point a root crack will surface but it probably won't be stable
Click to expand...
Click to collapse
I don't need root though.
Just the possibility of flashing an unbranded ROM with no bloat, something that won't be used with US carriers.
Sent from my SM-G955F

murtaza02 said:
I don't need root though.
Just the possibility of flashing an unbranded ROM with no bloat, something that won't be used with US carriers.
Click to expand...
Click to collapse
You cannot flash firmware without rooting on this device. That's my point. When you try flashing in Odin, nothing happens. That's why you cannot root or even flash things. Got it? You need root in this case.

I think we are after the same thing; xas is sprint from my understanding. xaa should be the "unlocked" carrier neutral you are looking for. There is a thread in the s8 forum where some people had success flashing parts of the Canadian firmware then refreshing parts of us firmware they had quasi obtained this but I have yet to try
https://forum.xda-developers.com/galaxy-s8/how-to/rd-carrier-switch-root-snapdragon-t3597473

I read somewhere that only G955f models can change CSC firmware using Odin.
G955U models won't be able to... I could be wrong...
Then again, we won't really know until someone buys the U model and tries it out for themselves.

photolarry said:
You cannot flash firmware without rooting on this device. That's my point. When you try flashing in Odin, nothing happens. That's why you cannot root or even flash things. Got it? You need root in this case.
Click to expand...
Click to collapse
Ah, makes sense. Thanks man.
Damn it. :/
HNIC215 said:
I read somewhere that only G955f models can change CSC firmware using Odin.
G955U models won't be able to... I could be wrong...
Then again, we won't really know until someone buys the U model and tries it out for themselves.
Click to expand...
Click to collapse
Yeah that is the case. Damn locked bootloaders.
sniper7kills said:
I think we are after the same thing; xas is sprint from my understanding. xaa should be the "unlocked" carrier neutral you are looking for. There is a thread in the s8 forum where some people had success flashing parts of the Canadian firmware then refreshing parts of us firmware they had quasi obtained this but I have yet to try
https://forum.xda-developers.com/galaxy-s8/how-to/rd-carrier-switch-root-snapdragon-t3597473
Click to expand...
Click to collapse
Isn't SPR the CSC for Sprint?
Sent from my SM-G955F

murtaza02 said:
Ah, makes sense. Thanks man.
Damn it. :/
Yeah that is the case. Damn locked bootloaders.
Isn't SPR the CSC for Sprint?
Sent from my SM-G955F
Click to expand...
Click to collapse
Yep, https://www.sammobile.com/forum/showthread.php?t=23331
But so is xas

What did you find out?
What did you find out? I'll try it with mine but I need help. I am by no means a schooled veteran in the world of command lines and tech talk but I can follow direction. I've managed to unbrick a couple LGLS 675 and bypass frp (for myself) a couple hundred times. I'll post a screen shot of my about phone if you guys are interested.

beachedv said:
What did you find out? I'll try it with mine but I need help. I am by no means a schooled veteran in the world of command lines and tech talk but I can follow direction. I've managed to unbrick a couple LGLS 675 and bypass frp (for myself) a couple hundred times. I'll post a screen shot of my about phone if you guys are interested.
Click to expand...
Click to collapse
Here's the thread you need to see:
https://forum.xda-developers.com/showthread.php?t=3627255

hi can any body tell me or help in finding the serial no of my phone Galaxy S8+ (SM-G955U1)=G955U1UEU2CRB9
regards
thankyou

itsme_4ucz said:
hi can any body tell me or help in finding the serial no of my phone Galaxy S8+ (SM-G955U1)=G955U1UEU2CRB9
regards
thankyou
Click to expand...
Click to collapse
- Settings
- About phone

rogerandgina said:
- Settings
- About phone
Click to expand...
Click to collapse
my phone is bricked.:angel:

itsme_4ucz said:
my phone is bricked.:angel:
Click to expand...
Click to collapse
Do you have the original box?

itsme_4ucz said:
my phone is bricked.:angel:
Click to expand...
Click to collapse
im using a 955f (so could be different on your phone), but just turn the phone around, on mine the S/N stands printed on the bottom of the backside, you can slightly see it ->here<-
and also I'm really not sure about that, but i believe some Serial/IMEI/whatever-numbers do stand in download mode
EDIT: By what i've found google'in, on the 955U, just the IMEI is printed. Sorry

Related

G955FXXU1AQH3 unlocked, bloatware grabage problem.

Hey fella's, and ladies. I just got my G955F, bought inside of the US off of the same person I usually go through. Turns out It's a UK model that came with Vodafone bloatware and shows 4G instead of LTE (even though it IS LTE). Is there a US variant? And if so can I flash the phone with any G955F variant software using odin? So I guess I'm asking, what is the best, and purest firmware if I am in the US. I have T-Mobile and I'm in Cali. Thanks ahead. (Sorry, but I posted this in the S8 section originally, like a dumb-dumb)
Also, could I flash with G955U unlocked firmware?
http://updato.com/firmware-archive-select-model?exact=1&q=SM-G955F
Here you can download the US ROM and use Odin to flash - these are official ROM's so Knox will not be tripped
NO
You CANNOT flash a G955U rom to a G955F device
It will definately soft brick or even hard brick your device
You can flash this rom ( https://www.sammobile.com/firmwares/galaxy-s8/SM-G955F/EUR/download/G955FXXU1AQH3/184528/ )
No bloatware, multilang and fast updates.
meddylad said:
http://updato.com/firmware-archive-select-model?exact=1&q=SM-G955F
Here you can download the US ROM and use Odin to flash - these are official ROM's so Knox will not be tripped
Click to expand...
Click to collapse
DON'T GIVE WRONG INFORMATION!!!
If you don't know what you talking about, then say nothing!
You CAN'T flash G955U FW to a G955F
Do you know the difference between the G955U & G955F?
If you did, than you would have known the answer!!!
cc: @AlanRinzl3r
Read the post moron
He has a G955F phone with a UK ROM on it... he wants a US ROM so the link takes him to the US ROMS for a G995F phone
I didnt answer the last bit about the G955U as I only just saw that - and just to clarfiy the G955U is the Snapdragon version so no, a Exynos ROM will not work
t-shock said:
NO
You CANNOT flash a G955U rom to a G955F device
It will definately soft brick or even hard brick your device
You can flash this rom ( https://www.sammobile.com/firmwares/galaxy-s8/SM-G955F/EUR/download/G955FXXU1AQH3/184528/ )
No bloatware, multilang and fast updates.
Click to expand...
Click to collapse
This will be great if I can't find a US variant.
meddylad said:
Read the post moron
He has a G955F phone with a UK ROM on it... he wants a US ROM so the link takes him to the US ROMS for a G995F phone
I didnt answer the last bit about the G955U as I only just saw that - and just to clarfiy the G955U is the Snapdragon version so no, a Exynos ROM will not work
Click to expand...
Click to collapse
Got it. Couldn't find any US firmware on that page. Part of my question about the US firmware, or multilang firmware comes from the fact that Walmart sells G955F's. I would imagine whatever firmware is on there would be what I would want. Just don't know what that is.
-Thanks for all the replies so far. If I can't figure out what firmware comes on the US Walmart G955F phone, I suppose I will go with the variant listed above.
-Also, will VoLTE work on the multilang rom? Or is there a rom that works with T-Mobile and VoLTE? And if anyone is wondering, I wanted to Exynos variant, that's why I didn't buy G955U.
meddylad said:
Read the post moron
He has a G955F phone with a UK ROM on it... he wants a US ROM so the link takes him to the US ROMS for a G995F phone
I didnt answer the last bit about the G955U as I only just saw that - and just to clarfiy the G955U is the Snapdragon version so no, a Exynos ROM will not work
Click to expand...
Click to collapse
Look who's talking, MORON!
There is NO US-Firmware for the G955F-model!
t-shock said:
NO
You CANNOT flash a G955U rom to a G955F device
It will definately soft brick or even hard brick your device
You can flash this rom ( https://www.sammobile.com/firmwares/galaxy-s8/SM-G955F/EUR/download/G955FXXU1AQH3/184528/ )
No bloatware, multilang and fast updates.
Click to expand...
Click to collapse
Well, I went ahead and used this firmware. Really like it, no problems at all and its exactly what you said it would be (hopefully its got great support as well). Appreciate the direction. Thank you.
If anyone finds out what comes on the US released (Walmart) G955F, I would really like to know. I've been searching and searching, and can't seem to figure it out.
AlanRinzl3r said:
Well, I went ahead and used this firmware. Really like it, no problems at all and its exactly what you said it would be (hopefully its got great support as well). Appreciate the direction. Thank you.
If anyone finds out what comes on the US released (Walmart) G955F, I would really like to know. I've been searching and searching, and can't seem to figure it out.
Click to expand...
Click to collapse
No problem. Im sure that you will like it even more
If you can, please share a pic from the device info to see which CSC do you have
Hi guys, I've just got a G955F as an upgrade from Vodafone UK with lots of their bloatware. Can I flash any other firmware over it without tripping Knox or invalidating the warranty? I'm in the UK btw.
Sent from my SM-G955F using Tapatalk

Galaxy s8+ japanese

which variant do i use for galaxy s8 from japan? Sm-G955J / SVC35
Please
variant of what? you looking to stay w/Japanese or go to another region/country?
I just want to use an operator-free rom stock, but I can still use it in Japan
Thanks for help!
What's Japan use for cell svc, GSM? Exynos phone? If so pretty much any custom Exynos ROM, with the version appropriate CSC ought to work just fine.
Maybe it's out of topic, but kinda similar with my question, and the last reply is still quite recent.
I just got a used s8+ g9550 (TGY/Hongkong). I looked at Phone Info app, it comes with Hongkong PDA & CSC (G9550ZHU1AQG6), and US version of BL & CP (G955USQU1AQGL). Still on Nougat 7.0.
It works just fine here in Indonesia. But I'm afraid it won't be getting any OTA updates since I'm not living in China. Is it actually OK to mix up the firmware (AP, CSC,BL,PDA) like that? What versions are compatible with my device?
I'm totally new here. I don't even know why there're 4 firmwares for each device, and what each one of them is for. All I know CP = Modem/Baseband, BL = Bootloader. Mind to explain it to me? Thanks
Sent from my SM-N9005 using XDA Labs
JeffDC said:
What's Japan use for cell svc, GSM? Exynos phone? If so pretty much any custom Exynos ROM, with the version appropriate CSC ought to work just fine.
Click to expand...
Click to collapse
Hi, is snapdragon kddi au thanks!
tadho said:
Maybe it's out of topic, but kinda similar with my question, and the last reply is still quite recent.
I just got a used s8+ g9550 (TGY/Hongkong). I looked at Phone Info app, it comes with Hongkong PDA & CSC (G9550ZHU1AQG6), and US version of BL & AP (G955USQU1AQGL). Still on Nougat 7.0.
It works just fine here in Indonesia. But I'm afraid it won't be getting any OTA updates since I'm not living in China. Is it actually OK to mix up the firmware (AP, CSC,BL,PDA) like that? What versions are compatible with my device?
I'm totally new here. I don't even know why there're 4 firmwares for each device, and what each one of them is for. All I know AP = Modem/Baseband, BL = Bootloader. Mind to explain it to me? Thanks
Sent from my SM-N9005 using XDA Labs
Click to expand...
Click to collapse
I beleive your phone is a snapdragon processor not exynos - if it is chinese, I think there may be a way to unlock the bootloader but I am not 100% sure of that. I know that the S7 Chinese was able to be unlocked but there was a special ap you had to install in order to do it.
I know I haven't helped much but I wish you good luck...
JeffDC said:
variant of what? you looking to stay w/Japanese or go to another region/country?
Click to expand...
Click to collapse
I'm looking to go US, T-Mobile to be specific. What do you suggest?

Question S908N KTC to KOO

Hello fellows
So my issue is a bit long so sorry for that
I got this phone 3 days ago
S908N KTC Unlocked ( I live in Middle East and the SIM is working just fine )
I didn't know that this was a branded phone from KTC, I thought it was unbranded KOO
So right now I want to change the firmware to KOO to get rid of the KTC Boot animation and the KTC bloatware/settings
So how should I do that ? Just flash the KOO firmware using Odin? do I need to change csc? is that risky and may trigger Knox and block the phone ?
and after that can I just flash like the middle east firmware ?
Thank you in advance and sorry for taking too long
I'm attaching a screenshot of the CSC and software version of service provider
Use samkey. Pay for a key then change your csc using it
Abaddon said:
Use samkey. Pay for a key then change your csc using it
Click to expand...
Click to collapse
so I can't just change the csc with Odin ?
Mem_0 said:
so I can't just change the csc with Odin ?
Click to expand...
Click to collapse
No
Abaddon said:
No
Click to expand...
Click to collapse
I went to samkey and put in the model number and says it does not support that model
Mem_0 said:
I went to samkey and put in the model number and says it does not support that model
Click to expand...
Click to collapse
Yes, but some users already tried and it worked. I remember reading one or two days ago about exactly this...it says it is not supported but it works. I recall it was an Exynos device not SnapDragon but should work the same
Rapier said:
Yes, but some users already tried and it worked. I remember reading one or two days ago about exactly this...it says it is not supported but it works. I recall it was an Exynos device not SnapDragon but should work the same
Click to expand...
Click to collapse
okayy great, if you can refer me to link of that I would appreciate it.
another thing is after changing the csc I will be able to flash any stock rom which matches the device SOC which is snapdragon correct ?
Mem_0 said:
okayy great, if you can refer me to link of that I would appreciate it.
another thing is after changing the csc I will be able to flash any stock rom which matches the device SOC which is snapdragon correct ?
Click to expand...
Click to collapse
Hi, have you managed to change the CSC?
I also have the s908N and want to maybe put a European CSC. Also have no idea how does that work with SAMKEY
babyboy3265 said:
Hi, have you managed to change the CSC?
I also have the s908N and want to maybe put a European CSC. Also have no idea how does that work with SAMKEY
Click to expand...
Click to collapse
unfortunately i tried all ways , seems nothing is working until now, seems that Samsung has locked csc change on Korean Version for S22U
isn't samFw free?
Mem_0 said:
unfortunately i tried all ways , seems nothing is working until now, seems that Samsung has locked csc change on Korean Version for S22U
Click to expand...
Click to collapse
Thanks for confirming
At least it appears possible to root it and maybe install a custom rom.
I assume that only the rom builders might be able to create a solution for the N version as an installation option in a rom.
However they might not be motivated due to the small number of people having the N versions. Unless of course a few of us agree to contribute in the form of a donation, then maybe a developer can play around and make it happen. What do you think?
Myque said:
isn't samFw free?
Click to expand...
Click to collapse
yes, samkey is the paid one
babyboy3265 said:
Thanks for confirming
At least it appears possible to root it and maybe install a custom rom.
I assume that only the rom builders might be able to create a solution for the N version as an installation option in a rom.
However they might not be motivated due to the small number of people having the N versions. Unless of course a few of us agree to contribute in the form of a donation, then maybe a developer can play around and make it happen. What do you think?
Click to expand...
Click to collapse
well, I'm not really planning to root as this will trip knox.
Any news on changing KTC to KOO? I rooted SM-S908N, installed app Phone INFO+ Samsung, but don't see a way to change CSC. It just sees KTC region. Chimera Tool also gives info SM-S908N is not supported device. So, is there any way to get KOO or at least get rid of KTC Boot animation and the KTC bloatware/settings?
spnchik said:
Any news on changing KTC to KOO? I rooted SM-S908N, installed app Phone INFO+ Samsung, but don't see a way to change CSC. It just sees KTC region. Chimera Tool also gives info SM-S908N is not supported device. So, is there any way to get KOO or at least get rid of KTC Boot animation and the KTC bloatware/settings?
Click to expand...
Click to collapse
Same question, looking for any solution
smartmobee said:
Same question, looking for any solution
Click to expand...
Click to collapse
I am waiting too
any update, bro?
Sadly it seems like the Korean version of the phone will never get a different CSC... :/
I successfully changed KTC to KOO using Shell exploit method mentioned in S22 thread.
Also, yeah without root and without triggering knox.
mohitgalaxy3 said:
I successfully changed KTC to KOO using Shell exploit method mentioned in S22 thread.
Also, yeah without root and without triggering knox.
Click to expand...
Click to collapse
can u share the thread link and any workarounds you have made?

Question Flip 3 5G F711U1; XAA => INU

I have got a Samsung Flip3 US unlocked version. Have been using it outside US with and Indian SIM card from last few months without any hiccups. With Samsung Pay working as well.
Now, with the release of 5G services here in India, I'm not sure the bands that Indian operators use are unlocked or not in this. Jio (Indian service provider) says that you're using a non-5G device.
So, I was wondering if I flash an INU firmware to my device. Will it unlock the bands and also let me get OTAs from Samsung? Maybe if someone here did this already?
(According to Jio, this phone is compatible with their 5G network. Also, checked on gsmarena, the international version has the bands that JIO supports.) Since the chipset in international and US is same, I suppose the bands are already there in the device.
Thanks in advance for your help and comments.
Hi Jatin, I don't think flashing your US flip 3 with IND firmware, will fix your problem. The IND firmware is for the F711B model, you are on the F711U1 model. I would not try that. A lot of the F7711B firmware are multi-CSC, but not for the U1 model.
Thanks for the reply, @slysurfer.
I was thinking that since both F711B and F711U1 share the same chipset (Snapdragon 888), the F711B firmware drivers will work on F711U1.
I read some other posts in here (on XDA itself) in which someone with an EUX variant flashed INU firmware to it. Not sure the EUX variant is multi-CSC or not.
jatin21 said:
Thanks for the reply, @slysurfer.
I was thinking that since both F711B and F711U1 share the same chipset (Snapdragon 888), the F711B firmware drivers will work on F711U1.
I read some other posts in here (on XDA itself) in which someone with an EUX variant flashed INU firmware to it. Not sure the EUX variant is multi-CSC or not.
Click to expand...
Click to collapse
Yes, the EUX variant is multi-CSC (to a degree) I can flash any firmware from Europe to South East Asia, but as mentioned we can't flash any firmware from US/Canada.
Big >IF< you can OEM unlock the bootloader you can install twrp and disable the vbmeta and flash a U firmware over a U1 phone and visa versa. But even if you can do all of that it probably still won't work. Personally I'd take it to my local mobile phone stall and see if they can do it.
Thankyou @beanbean50 for your answers.
Sorry for the noob question, . Earlier when Samsung used to release 2 different hardware versions of the same phone like one with Exynos and other with Snapdragon, flashing the other region ROM was not possible.
So, I was just wondering, since both the regions (US & South East Asia) has the exactly same hardware, the networks bands in both of these must only be software locked. Thus, since the US version already has the hardware, can't simply flashing a different region ROM should work.
Again, if there are some other locks that prevent this, it's not possible to flash. Just like if on paper both devices are same, the only difference they have is, they are released in different region.
Also, I checked, both are also manufactured in the Vietnam.
jatin21 said:
Thankyou @beanbean50 for your answers.
Sorry for the noob question, . Earlier when Samsung used to release 2 different hardware versions of the same phone like one with Exynos and other with Snapdragon, flashing the other region ROM was not possible.
So, I was just wondering, since both the regions (US & South East Asia) has the exactly same hardware, the networks bands in both of these must only be software locked. Thus, since the US version already has the hardware, can't simply flashing a different region ROM should work.
Again, if there are some other locks that prevent this, it's not possible to flash. Just like if on paper both devices are same, the only difference they have is, they are released in different region.
Also, I checked, both are also manufactured in the Vietnam.
Click to expand...
Click to collapse
Can you unlock the bootloader?
beanbean50 said:
Can you unlock the bootloader?
Click to expand...
Click to collapse
There is not OEM unlocking in under developer options. I have through other posts and things on how to unlock. I suppose it can't be unlocked in a straightforward like F711B can be.
I suppose this is the hard-stop that cleared my doubts.
Thanks one again, @beanbean50 for your time and answers. Really appreciated!!
P.S.: If you or someone you know have some experience unlocking a US snapdragon Samsung device bootloader, please do share. I might have to consider unlocking bootloader in the future.

Question Change CSC to INS for Native Call Recording and S Pay

Hi, I have a USA Unlocked unit of S22 Ultra, I Flashed it with a U1 firmware, The device shows OYM, XAA CSC. I wish to flash INU firmware or change CSC to INS for Native call recording, which option would work? If it's possible to flash Indian Firmware. Please guide me on which option is viable and which would be the best?
Thanks
I am in same position as you are in....neither of any will work...i tried both things....it doesn't work
pushkar0501 said:
I am in same position as you are in....neither of any will work...i tried both things....it doesn't work
Click to expand...
Click to collapse
That's Sad.
Its annoying although both indian and usa models got snapdragon chip still it won't allow to change the firmware
pushkar0501 said:
Its annoying although both indian and usa models got snapdragon chip still it won't allow to change the firmware
Click to expand...
Click to collapse
True.. I think some solution would come up soon.
akashg said:
True.. I think some solution would come up soon.
Click to expand...
Click to collapse
I don't think so....if there was a solution its been a year already since the phone launched any solution might would had came if there was any....
And knowing samsung, it have already thought about all this from the beginning only and designed the device like this....poor us
pushkar0501 said:
I don't think so....if there was a solution its been a year already since the phone launched any solution might would had came if there was any....
And knowing samsung, it have already thought about all this from the beginning only and designed the device like this....poor us
Click to expand...
Click to collapse
We tried to save some bucks by buying international units, and here we are stuck with US firmware. They knew this will happen so they planned it that way.
akashg said:
We tried to save some bucks by buying international units, and here we are stuck with US firmware. They knew this will happen so they planned it that way.
Click to expand...
Click to collapse
You got the point bro ....
pushkar0501 said:
You got the point bro ....
Click to expand...
Click to collapse
Hi, Which network do you use? I am not getting LTE+ on my unit. I am using Jio.
akashg said:
Hi, Which network do you use? I am not getting LTE+ on my unit. I am using Jio.
Click to expand...
Click to collapse
if it's snapdragon, then you can try to enable CA using unlock band guide available in S22 forums.
If you are not able to access service menu, you can get it using Samsung Shell Exploit forums in S22.
Using jio and using 5g on it

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