Note 20 Ultra US Automatic Carrier Switching - Samsung Galaxy Note 20 Ultra Questions & Answers

Been searching the forums and have not found a solution yet.
Current Situation: Have a Note 20 Ultra US Verizon verient, SM-986U, Verizon Unlocked.
Current Issue: When ATT, US Cellular ect. SIM card is inserted, device will not recognize it and won't switch to new carrier.
Reference: Have a Note 10 Plus that is unlocked from verizon and currently accepts and reprovisions based on sim card.
Question then is, why is the multi csc note 20 from verizon not behaving the same way.

First thing would be to verify it's actually unlocked.
Second would be to perform a factory reset with the new carriers SIM card installed.
It should definitely see the new SIM after that.

rjohnstone said:
First thing would be to verify it's actually unlocked.
Second would be to perform a factory reset with the new carriers SIM card installed.
It should definitely see the new SIM after that.
Click to expand...
Click to collapse
Talked to maybe 7 verizon agents all teir 2, all confirmed its unlocked on all levels, (network, financial).
Talked to samsung and they say its locked to verizon, but not able to say how.
I have done what you mentioned as far as reset with different sim. I can also include that the other note 20s i have show same thing.

Have you verified that you actually have multi csc. May have to flash u1 firmware.
Sent from my SM-N986U1 using Tapatalk

pimpmaneaton said:
Have you verified that you actually have multi csc. May have to flash u1 firmware.
Sent from my SM-N986U1 using Tapatalk
Click to expand...
Click to collapse
How would i verify, as far as i know i do.

crimznsins said:
How would i verify, as far as i know i do.
Click to expand...
Click to collapse
In Google dialer do *#272*YOUR_IMEI* that will pull up a list of csc that the phone can switch to. Don't change anything there and just cancel out of it, but can just verify that way.
Sent from my SM-N986U1 using Tapatalk

Carrier switching historically speaking is included in a firmware update that occurs about 4 to 6 months into the product life cycle.

Yeah am thinking without U1 firmware, probably won't happen. They have probably blocked the other csc somehow like they like to block everything else.
Sent from my SM-N986U1 using Tapatalk

Limeybastard said:
Carrier switching historically speaking is included in a firmware update that occurs about 4 to 6 months into the product life cycle.
Click to expand...
Click to collapse
Hmm and thats what i worried about, might be to soon for auto switching, about 2 weeks ago the *#272* code did let me see the list, i didn't select anything with not being familiar with it, but no longer works, dialer won't accept. So bottom line that i'm thinking is give it a few months and should get update else flash U1 firmware to get around it.

crimznsins said:
Hmm and thats what i worried about, might be to soon for auto switching, about 2 weeks ago the *#272* code did let me see the list, i didn't select anything with not being familiar with it, but no longer works, dialer won't accept. So bottom line that i'm thinking is give it a few months and should get update else flash U1 firmware to get around it.
Click to expand...
Click to collapse
Sounds like a good idea.

pimpmaneaton said:
In Google dialer do *#272*YOUR_IMEI* that will pull up a list of csc that the phone can switch to. Don't change anything there and just cancel out of it, but can just verify that way.
Sent from my SM-N986U1 using Tapatalk
Click to expand...
Click to collapse
Thanks all for answering, so what i have found out is the following.
1. SM-N986U is Multi CSC " Verizon, US Cellular, ATT, Ect".
2. *#272*IMEI# will not work in phone or google dialer for some Loaded CSC configuration. "VZW,USC,ATT".
3. Using Google Phone, *#*#27262826#*#* does in fact work on all configurations of csc U or U1 variants.
4. I did confirm that my device was unlocked but firmware csc has to manually be changed with dialer code. I was able to move between all loaded CSC with boot screens and network configurations.
5. We are currently waiting on samsung to push patch for sim auto recognition for CSC rebrand.

crimznsins said:
Thanks all for answering, so what i have found out is the following.
1. SM-N986U is Multi CSC " Verizon, US Cellular, ATT, Ect".
2. *#272*IMEI# will not work in phone or google dialer for some Loaded CSC configuration. "VZW,USC,ATT".
3. Using Google Phone, *#*#27262826#*#* does in fact work on all configurations of csc U or U1 variants.
4. I did confirm that my device was unlocked but firmware csc has to manually be changed with dialer code. I was able to move between all loaded CSC with boot screens and network configurations.
5. We are currently waiting on samsung to push patch for sim auto recognition for CSC rebrand.
Click to expand...
Click to collapse
Dialed *#*#27262826#*#* on my unlocked Tmobile

Reading a bit more here.. So, I bought a N20 Ultra (SM-N985F/DS) unlocked, I'm currently using it in Colombia, the CSC code for this device is TPA (Panama). I want to change to generic unlocked (don't know if there is such a CSC) or a US unlocked not branded one... In this case is there a way to do this without ROOT/messing up KNOX? I travel quite frequently to the US and I enjoy using SAMSUNG PAY which is disabled (I get a message saying SAMSUNG PAY is not supported on my phone).
I do realice there are quite some threads on this CSC but I haven't found one that has the answer I'm, looking for (maybe not searching properly). Any guidance on where to look is more than welcomed.
Regards

crimznsins said:
Thanks all for answering, so what i have found out is the following.
1. SM-N986U is Multi CSC " Verizon, US Cellular, ATT, Ect".
2. *#272*IMEI# will not work in phone or google dialer for some Loaded CSC configuration. "VZW,USC,ATT".
3. Using Google Phone, *#*#27262826#*#* does in fact work on all configurations of csc U or U1 variants.
4. I did confirm that my device was unlocked but firmware csc has to manually be changed with dialer code. I was able to move between all loaded CSC with boot screens and network configurations.
5. We are currently waiting on samsung to push patch for sim auto recognition for CSC rebrand.
Click to expand...
Click to collapse
I have a verizon unlocked s21 ultra that i might have to try this with. Currently being annoyed that I'm not getting the tmobile bands due to carrier settings not updating.

joancolmenares said:
Reading a bit more here.. So, I bought a N20 Ultra (SM-N985F/DS) unlocked, I'm currently using it in Colombia, the CSC code for this device is TPA (Panama). I want to change to generic unlocked (don't know if there is such a CSC) or a US unlocked not branded one... In this case is there a way to do this without ROOT/messing up KNOX? I travel quite frequently to the US and I enjoy using SAMSUNG PAY which is disabled (I get a message saying SAMSUNG PAY is not supported on my phone).
I do realice there are quite some threads on this CSC but I haven't found one that has the answer I'm, looking for (maybe not searching properly). Any guidance on where to look is more than welcomed.
Regards
Click to expand...
Click to collapse
Hi, wondering if you ever got this figured out, i'm in similar situatuin. I live in the Caribbean and bought the N20 Ultra (SM-N985F/DS) unlocked, has CSC code TPA. I want a global or us unlocked CSC or firmware so I can enable e-sim as I travel a lot. It is incrediby annoying that the phone is advertised as Esim enabled but many variants still dont have this activated.

crimznsins said:
Thanks all for answering, so what i have found out is the following.
1. SM-N986U is Multi CSC " Verizon, US Cellular, ATT, Ect".
2. *#272*IMEI# will not work in phone or google dialer for some Loaded CSC configuration. "VZW,USC,ATT".
3. Using Google Phone, *#*#27262826#*#* does in fact work on all configurations of csc U or U1 variants.
4. I did confirm that my device was unlocked but firmware csc has to manually be changed with dialer code. I was able to move between all loaded CSC with boot screens and network configurations.
5. We are currently waiting on samsung to push patch for sim auto recognition for CSC rebrand.
Click to expand...
Click to collapse
I have tried dialing *#*#27262826#*#* in stocks phone app and Google phone app with no luck.
U1 model, CSC - ATT/ATT,ATT/XAA
I desperately need to be able to manually select my bands and the last Samsung update broke the permissions for the shortcut maker app I was using. I live on US/MX border and I cross every day and my phone is constantly changing bands and some are incredibly slow, it's killing me. Any help would be appreciated.

With newer os versions, we are unable to manually change CSC on devices using dialer codes, only way is to use a 3rd party csc changer. I would not recommend unless you know what your doing.

Related

SIM unlock?

Please post experience with S7 SIM (carrier) unlocking here, specifically third party websites that offer an unlocking service.
I bought my phone out right from T-mobile. And their unlock app that comes on the phone does not work
HTCMDA said:
I bought my phone out right from T-mobile. And their unlock app that comes on the phone does not work
Click to expand...
Click to collapse
It works but you have to know what you're doing with it. Did you contact Tmobile for unlock code. We unlock and blacklist repair the Sprint, Tmobile, etc. The Tmobile ones have to go through that app during the process
supreme83 said:
It works but you have to know what you're doing with it. Did you contact Tmobile for unlock code. We unlock and blacklist repair the Sprint, Tmobile, etc. The Tmobile ones have to go through that app during the process
Click to expand...
Click to collapse
yea man i called...they sent an email with instructions.. email stated this phone doesn't require an unlock code as it has a built in unlock app. follow the directions below blah blah balh
bottom line, it doesn't work. why? because there's hidden rules and crap that need to be met 1st by t-mobile. prepaid people need to spend at least 100 dollars in refills before the phone is eligible. post paid people need to have the phone active on t-mobile for a minimum of 45 days and your account cannot be cancelled during that time.
well seeing as how i'm on prepaid... i walked in, made a new customer purchase as a post paid user, then cancelled my line after i got my gear vr and netflix code... which wasn't even 30 days. I can't unlock my phone, So I'm now on prepaid gonna see if I can after 100 dollars in refills
Try to use UnlockRadar for any phone using Device Unlock App from T-Mobile, including the Galaxy S7. You can find more here: https://www.unlockradar.com/service/t-mobile-usa-device-unlock-app-official-unlock
Hello,
i need a help with a unlocking Samsung Galaxy S7 SIM (network) too. It is locked to Vodafone UK.
Does anyone know any reliable services to do it?
Thanks
merlooo said:
Hello,
i need a help with a unlocking Samsung Galaxy S7 SIM (network) too. It is locked to Vodafone UK.
Does anyone know any reliable services to do it?
Thanks
Click to expand...
Click to collapse
I use ebay to get my unlock codes, unlocked maybe a dozen phones in the last few years and never had any issues with anyone.
A couple reliable sites I've used many times are www.unlockbase.com and www.cellunlocker.net . There's also a thread over on the s6 general forum of a member named stifilz that can unlock your device via USB cable, his service is free but a donation is always a nice gesture. Good luck!
Sent from the silver bullet 930F Running Superman Rom
kinda ridiculous you have to pay to get an unlock code still. My SM-G930FD i bought unlocked locks itself every time in install a T-mobile csc and the app wont even run on that phone
Hi can anyone help? I bought an At&t S7 Edge on amazon and got the unlock code from the vendor and it apparently worked. My only issue is that it'll only work with the sim that was in the phone when I entered the code. If I use another one the phone keeps displaying "insert sim". Thanks already for your replies
Thanks for the reply and there's 1 more things I need to mention: I'm using the phone overseas (Haiti) as it's still under At&t contract. Now to answer your questions no it doesn't ask for the unlock code anymore but like I said it only works with the non At&t
sim I used when entering the unlock code.
SamsungCodeSource said:
Hey there macphephe,
What network are you trying to use the phone with and does the phone ask for the unlock code still when you turn the phone on with a non AT&T simcard/
Let me know we can help
Click to expand...
Click to collapse
s7 (sm-930f) lock to Austrian A1 was not able to be unlocked by unlockbase.com. However, the nck from cellunlocker.net worked well.
Ok so what im mentioning is something im still not getting quite well, but i saw before many samsung phones S6, S7, Note... etc that have the international firmware 9XXF/FD even when the phone is actually a T-Mobile version or AT&T, in download mode you will be shown the real phone model but the firmware isn't. Of course through Odin with a PC you won't be able to flash the phone with a firmware besides the one designed for it. If you actually wanna flash the phone you'll need the original firmware, i tried it before and flashed a Verizon S6 that had the international 6.0 firmware on it through Odin and as you might guess i got an error as the device didn't match the firmware, when i actually flashed it with the correct Verizon 7.0 firmware it worked and the phone booted and worked alright, except that now the phone is network locked! downgrade isn't possible unless i use a repair firmware and a pit file (not sure if still works with nougat). Then i got the idea of actually using the repair firmware and the pit of the 9XXF version as its network free, and ended up breaking the phone completely. The jig didn't work so couldn't access odin. So i work for a friend of mine in a repair workshop PC, Consoles, Mobiles... blablabla and we have the Z3x box, it did unbrick the phone, and then i started playing with it to see what it can do, and there is an option to actually flash and mix different parts of the firmware, so i went an flashed the bootloader of the Verizon firmware with the rest from the international firmware, it didn't boot at first but somehow i got it into recovery mode and after a format it did boot, and the network was actually unlocked after.
I do not think this method would work on all versions, as some samsung phones uses the snapdragon soc while others uses the exynos soc, and i don't think you can mix those firmwares, but an unlocked exynos model might be unlockable with the international firmware, of course considering the risk of breaking the phone, but if you're lucky as i was and have one of those boxes you shouldn't be much afraid.
Something else i'd like to mention, is that the Z3x can actually fully backup the phone, and i don't mean a nandroid backup like TWRP but like a full partitions backup, and the idea i got but didn't test is if you have for example a locked S7 and an unlocked one and same model so let's say 930P, you can actually copy the raw partitions from the unlocked one to the locked one and i don't know, maybe ending up unlocking it too, again didn't test this one as i only have one S7 and its already unlocked (930FD).

I've ordered the Korean model of the s8 and got some questions

Hello xda!
I've searched the web but found nothing, my question as you might have guessed from the title is the following.
Is the s8+ like the s7 edge locked to a region ? And can someone who received there phone confirm this.
To be clear I don't mean sim lock but region lock.
Thanks
Bump
denja12 said:
Hello xda!
I've searched the web but found nothing, my question as you might have guessed from the title is the following.
Is the s8+ like the s7 edge locked to a region? And can someone who received their phone confirm this.
To be clear I don't mean sim lock but region lock.
Thanks
Click to expand...
Click to collapse
*Since September 2013, Samsung has implemented a 'region lock' on all new stock.
For correct operation, this handset should be activated inside one of these countries with a SIM card issued for use there. The device will then be able to accept SIM cards from outside of these countries.
Activation requires turning the device on for the first time & completing set-up with the SIM installed, then completing at least 5 minutes of voice call(s) with this SIM.
Without activation you may still use the device outside of these countries when 'roaming' - using a SIM card from the listed countries.
If this activation procedure is not followed then the device will lock when first attempted to be used with a SIM card from outside of these regions. Local Samsung support may provide a code to unlock such handsets.
**All member states of the E.E.A and the following additional territories: Albania, Andorra, Bosnia and Herzegovina, Former Yugoslav Republic of Macedonia (F.Y.R.O.M), Monaco, Montenegro, San Marino, Serbia and Vatican City.
From what i understand you might need a sim from Korea to activate it once activated it will work worldwide with any sim card. i could be wrong but that’s how i think it works!
... watched a couple of unboxing videos but I've seen some models where the seal says "European Sim only" and factory seals where it just says the usual information about if seal is broken ...
I bought on Ebay the S8+ 128g and the seller said me it will be full unlock, i am in France, i receive it next week ... i will tell you ^^ ...
androidrouen said:
I bought on Ebay the S8+ 128g and the seller said me it will be full unlock, i am in France, i receive it next week ... i will tell you ^^ ...
Click to expand...
Click to collapse
So what happened?
Does the activation call work if done with an european SIM but outside europe's network (i.e. roaming)?
I have the SM-955N Korean Telecom version. When I went to buy it, I asked them if they had any factory sealed. The owner said that's not possible, all exported Korean phones need to be opened and activated in Korea before exporting if you want them unlocked.
I can put in any sim card now (tested with a HK sim and Japanese sim). Both work fine, but need to do some service mode tinkering to get LTE to work.
Sent from my SM-G955N using Tapatalk
forsberg78 said:
I have the SM-955N Korean Telecom version. When I went to buy it, I asked them if they had any factory sealed. The owner said that's not possible, all exported Korean phones need to be opened and activated in Korea before exporting if you want them unlocked.
I can put in any sim card now (tested with a HK sim and Japanese sim). Both work fine, but need to do some service mode tinkering to get LTE to work.
Sent from my SM-G955N using Tapatalk
Click to expand...
Click to collapse
Do they have a custom boot animation when they turn on, with the Korean carrier's name on it?
Yes I have the KT logo
Sent from my SM-G955N using Tapatalk
forsberg78 said:
Yes I have the KT logo
Sent from my SM-G955N using Tapatalk
Click to expand...
Click to collapse
Are there any markings on the device? Like branding of the carrier?
Nope. There's a line at the back of the device that shows the model number, imei, and the letters KT but it's like very small font, you wouldn't be able to see it unless you looked for it
Sent from my SM-G955N using Tapatalk
forsberg78 said:
Nope. There's a line at the back of the device that shows the model number, imei, and the letters KT but it's like very small font, you wouldn't be able to see it unless you looked for it
Sent from my SM-G955N using Tapatalk
Click to expand...
Click to collapse
Would you be able to record the boot animation so we know how it looks like? Thanks! :highfive:
Is there a way to do it within the system? I don't have another device to record it with
Sent from my SM-G955N using Tapatalk
Confirmed I had to have my SM-955N unlocked and used in Korea before shipping. Also have the KT logo. Back is actually less busy than other versions without all the FCC, CE etc logos.
Psytric said:
Confirmed I had to have my SM-955N unlocked and used in Korea before shipping. Also have the KT logo. Back is actually less busy than other versions without all the FCC, CE etc logos.
Click to expand...
Click to collapse
Did you have to go into service mode to unlock the LTE bands?
At the beginning I only got 3g but after going into service mode and playing with the network bands I somehow got LTE
Sent from my SM-G955N using Tapatalk
forsberg78 said:
Did you have to go into service mode to unlock the LTE bands?
At the beginning I only got 3g but after going into service mode and playing with the network bands I somehow got LTE
Sent from my SM-G955N using Tapatalk
Click to expand...
Click to collapse
No, but I live in China, it shows as "LTE+". Your region's mileage may vary.
I was going to make another thread, but then I saw this! I live in the US, have T-Mobile and bought a Samsung Galaxy S8+ off eBay from the Korean market. It says SK TELECOM. I currently have a lot of issues. I really regret my decision, but I'm trying to eliminate some possibilities. I spent days troubleshooting with T-Mobile and I not longer believe it to be an issue with them.
As N1NJATH3ORY pointed out, there may be a region lock. My phone appeared factory sealed. Although it doesn't say that I'm roaming or anything like that. My symptoms are: Unable to simultaneously use Data and Voice, phone calls taking approx. 15 minutes to go through and phone calls not being received and going directly to voicemail. Not to mention that some settings just are not available. For instance, Network Mode only shows me 2 options. "Use LTE when available" and "3G only". After talking with T-Mobile techs they mentioned for their phones they have one option that includes an auto-connect, LTE, 4G, 3G, Edge, etc. Since the phone is not originally a T-Mobile line, I could understand why I wouldn't see that. Still it seems very limited to only say "Use LTE when available".
There's also other things that are less pressing, but would be nice to have. Such as: Samsung Pay, WiFi Calling, VoLTE, Carrier Updates, get rid of mandatory camera shutter noise, more SOS features like US, etc.
For right now I would at least like a stable network connection for my phone. I fear I'll have to buy a new phone and have wasted the $1,200 I dropped on this phone. Despite the nice specs compare the US model, it's just not working out. In the meantime I'll be looking for answers / solutions.
Ambush083 said:
I was going to make another thread, but then I saw this! I live in the US, have T-Mobile and bought a Samsung Galaxy S8+ off eBay from the Korean market. It says SK TELECOM. I currently have a lot of issues. I really regret my decision, but I'm trying to eliminate some possibilities. I spent days troubleshooting with T-Mobile and I not longer believe it to be an issue with them.
As N1NJATH3ORY pointed out, there may be a region lock. My phone appeared factory sealed. Although it doesn't say that I'm roaming or anything like that. My symptoms are: Unable to simultaneously use Data and Voice, phone calls taking approx. 15 minutes to go through and phone calls not being received and going directly to voicemail. Not to mention that some settings just are not available. For instance, Network Mode only shows me 2 options. "Use LTE when available" and "3G only". After talking with T-Mobile techs they mentioned for their phones they have one option that includes an auto-connect, LTE, 4G, 3G, Edge, etc. Since the phone is not originally a T-Mobile line, I could understand why I wouldn't see that. Still it seems very limited to only say "Use LTE when available".
There's also other things that are less pressing, but would be nice to have. Such as: Samsung Pay, WiFi Calling, VoLTE, Carrier Updates, get rid of mandatory camera shutter noise, more SOS features like US, etc.
For right now I would at least like a stable network connection for my phone. I fear I'll have to buy a new phone and have wasted the $1,200 I dropped on this phone. Despite the nice specs compare the US model, it's just not working out. In the meantime I'll be looking for answers / solutions.
Click to expand...
Click to collapse
On mine everything works fine, the only problem could be Samsung pay in US, But all the rest is fine.
(i have 128gb Korea SKT too)
androidrouen said:
On mine everything works fine, the only problem could be Samsung pay in US, But all the rest is fine.
(i have 128gb Korea SKT too)
Click to expand...
Click to collapse
Are you also on T-Mobile? I'm going to try to write the individual I bought the phone from. I'll also contact Samsung about the region lock. Maybe that what I'm experiencing?
Try entering the code *#2683662# and configuring the network mode
Sent from my SM-G955N using Tapatalk
---------- Post added at 01:42 PM ---------- Previous post was at 01:41 PM ----------
But yeah, if it's factory sealed when you received it you may be SOL. It needs to be opened and activated Korea first.
Sent from my SM-G955N using Tapatalk

Where do OTA updates come from when using an MVNO like Straight Talk in the US?

Is there a way to know if/when an OTA update will arrive when using an MVNO like Straight Talk in the USA? I am using Straight Talk (w/AT&T SIM), and it won't show the Nougat update available , even though AT&T has seemingly pushed Nougat out to every S7 owner I know a couple months ago. I have the international version of the Galaxy S7 (G930F). Where is the update supposed to come from in this case? Does this come from Samsung or AT&T?
I realize I can flash it manually, but am looking for a no-hassle way with a low chance of messing anything up. Thanks.
Install this app https://play.google.com/store/apps/details?id=org.vndnguyen.phoneinfo and look up the active csc. That's the country it pings for updates.
Mine is XSG and I use straight talk at&t.
Sent from my SM-G930F using Tapatalk
Each model gets updates from that service's server. Att, tmo, vzw... so on. But it has to match that service's model. 930a, 930t, 930v.... straight talk has the 930vl. Now, if you have a sim from the right service in there, it should take the update just fine.
You can use smart switch for updates without the fear of messing up.
Sent from my Samsung Galaxy S7 using XDA Labs
So that being said, I could theoretically go download a version from another country if I had the Verizon variant of the phone?
Darkbandit14 said:
So that being said, I could theoretically go download a version from another country if I had the Verizon variant of the phone?
Click to expand...
Click to collapse
Only Snapdragon variants can be flashed and I'm not sure if that also means the g9300 china.
gunz.jones said:
Each model gets updates from that service's server. Att, tmo, vzw... so on. But it has to match that service's model. 930a, 930t, 930v.... straight talk has the 930vl. Now, if you have a sim from the right service in there, it should take the update just fine.
Click to expand...
Click to collapse
My phone's CSC code is showing TPA (Panama). It's got Nougat, so I'm happy, but I don't know if I need to/should change the CSC code to something in the US. I would like to get OTA updates, but I also don't want to do anything that could mess up the phone, such as blocking wi-fi tethering, which is currently working.
martyxng said:
My phone's CSC code is showing TPA (Panama). It's got Nougat, so I'm happy, but I don't know if I need to/should change the CSC code to something in the US. I would like to get OTA updates, but I also don't want to do anything that could mess up the phone, such as blocking wi-fi tethering, which is currently working.
Click to expand...
Click to collapse
Native WiFi tethering is available in the hybrid nougat Rom.

A simple question about csc code....

I've been searched for few days and try my best not to ask this stupid question. But seems like nobody cares about it or everyone know the answer except me....
So, here is the question:
The CSC code you talk about, looks like have three different "status" at least. The csc code found in download mode, the csc code found in recovery mode and the three codes found in "SETTINGS>ABOUT PHONE>Software information>Service provider", what EXACTLY did they mean?
I know there is active csc, firmware csc, original csc. For example the three CSC codes found in Settings, XAS/XAS/SPR, which is active csc? which is firmware csc? which is original csc?
Additional, I can't change the last csc code XXX/XXX/SPR, right? And in recently firmware, the active csc code seems like could change with SIM card inserted. If this is true, can I assume that there is no difference among USA's Carrier versions whether in hardware and in software?
PQWSaying said:
I've been searched for few days and try my best not to ask this stupid question. But seems like nobody cares about it or everyone know the answer except me....
So, here is the question:
The CSC code you talk about, looks like have three different "status" at least. The csc code found in download mode, the csc code found in recovery mode and the three codes found in "SETTINGS>ABOUT PHONE>Software information>Service provider", what EXACTLY did they mean?
I know there is active csc, firmware csc, original csc. For example the three CSC codes found in Settings, XAS/XAS/SPR, which is active csc? which is firmware csc? which is original csc?
Additional, I can't change the last csc code XXX/XXX/SPR, right? And in recently firmware, the active csc code seems like could change with SIM card inserted. If this is true, can I assume that there is no difference among USA's Carrier versions whether in hardware and in software?
Click to expand...
Click to collapse
From what I recall, when I initially got an S7 was that the phone had been made in Korea and the CSC region code was for China (first CSC), and the carrier (second CSC) was for I can't recall the phone companies name in China.
Even with the CSC described above, the phone worked just fine in the US. Never the less I changed the CSC by flashing. I chose the first CSC to be XAA (USA), for the second CSC I had the option for ATT, Sprint, etc so I could have used a specific CSC for a specific carrier, right? (yes)
But instead I wanted my phone to be more generic, because I wanted an easy method to allow for any US or European/other national region GSM sim, somewhat like an international phone yes?, so I chose XAA (generic sorta carrier) for the second CSC.
The original phones CSC can show up in an app which shows the phones origination, etc, but since the 'active' CSC is XAA/XAA, the original birth CSCs don't really matter any longer.
If I put in an ATT sim, remember I'm using a generic carrier CSC of XAA, the CSC will not change, though my phone will still work ok. If I put in a T-Mobile sim, it's the same, the phone still works but the XAA CSC stays the same.
I could flash the ATT CSC, and because my phone is a GSM phone, it would still work with a T-Mobile sim, but I might not get any special T-Mobile abilities, since the ATT provisioning may has some enabled extra services that T-Mobile might not have. I could flash the T-Mobile CSC and the same would apply if I inserted an ATT sim.
I'm not aware of the phone companies in the US yet making all their GSM phone compatible with each other by a simple sim switch (is that called e-sim or something like that?, though I understand that the hardware may be in many newer phones, but software disable. I believe there is a current law suit and or an FCC complaint regarding the issue or collusion by several phone companies, as with the phone companies 'disabling' a simple sim switch to change companies, makes is more difficult for users to easily change phone service providers.
As usual, most US companies do what they can to make things more difficult for their customers, and our government does little to stop them. We sure could use Europes more friendly citizen advocacy and better pricing, increased privacy and control of our personal info, as well better service for public utility, internet and phone services. Europeans just don't put up with the s**t like US citizens do.
So going back to your original post, the active CSC is what you need to pay attention to in order to mate that with your current region and service provider. The original CSC info, from my perspective, might only be useful if you wish to return a phone back to it's stock birth status.
Anyway, I hope this helps answer your question.
I know this is a really old post, but I was digging in to know about the Service Provider... I have XAA/XAA/SPR on my SM-N960U (Note 9), I'm outside of the US I'm living at Central America, so when I just came here I bought a Sim-Card from here and All works fine, now. I'm trying to Update by Odin to Android Pie, but I don't want to mess up with this important part because I will still live here during the following year. so, you think there is a possibility of messing this "sim-Unlock" by upgrading? hope you can answer this post I know it's being a while since the OP.
so did anyone find out how to the change the 3rd CSC code. eg i can convert a VZW/VZW/VZW to VTR/VTR/VZW. But how i change that last VZW to VTR also. Some say it cannot be changed, but others say i can be.
im coming from a s8+, where you could flash the combination files etc.. and end up with all three same csc codes on the phone eventually.

Question Why does my CSC say OYM?

I have an unlocked S22 ultra I bought from Samsung. I still haven't gotten the upgrade to UI 5. I'm in the US on Verizon. I was going to flash the upgrade myself and I'm trying to follow the instructions on here. I have been able to get all my bands unlocked. I have all my hidden codes enabled. Both my SIM cards read XAA. But my CSC code under software provider version reads SM-S908U1_OYM_VZW_12_0032
I've tried using the SamFW FRP tool to remove FRP and it says successful but when I try to change CSC it says no device found. Yet, on my terminal window my adb can read my phone.
When I tell SamFW to read ADB at the end this is the result:
Root status
Shell SU: NO
Binary Magisk: NO
Binary SU: NO
App Magisk: NO
App SuperSU: NO
No device selected
but if I switch to my Windows Terminal window and type "adb devices" I get:
List of devices attached
R5CT6003FPA device
When I click on the "change CSC" button on SamFW I get "No Device Attached" error.
On my S22 Ultra, I keep checking for updates and my phone keeps telling me I'm up to date.
I've attached a screenshot of my system's software info. I'm getting frustrated. Verizon won't help me because my phone is unlocked and I have Samsung Care. Samsung's answer is to mail my phone in and wait 10 days for them to look at it or pay $99 for a new one. I've been out of work a year and have $25 left to my name. My cell is my only phone. Neither option works for me. But yet both companies are all too happy to take my payments every month.
All the US CSCs are in one bundle CSC called OYM. So your CSC correct. If you look under the service provider info, it says VZW/VZW/VZW/XAA, which is correct as you're on the VZW CSC.
Verizon doesn't seem to have released One UI 5 yet (the firmware isn't released yet), so that's probably why you're not getting updated. You can take your SIM out, switch to TMB CSC with SamFW tool then check for updates (TMB already has 5 released), then put your SIM back in and it will switch back to VZW automatically.
For SamFW to work, make sure you enabled ADB in debugging mode. It should find it, if not, then check your cable or make sure to install Samsung drivers first.
Ok so after much labor, I got the update on my phone. Now I think I locked it to Verizon which I'm pissed as hell over. I lost my Samsung dialer and I have Verizon's dialer which I'm FURIOUS over. The whole reason I bought this phone was because of that app. Samsung has a built in spam blocker and caller id for FREE. now it's gone.
HyperChick said:
Ok so after much labor, I got the update on my phone. Now I think I locked it to Verizon which I'm pissed as hell over. I lost my Samsung dialer and I have Verizon's dialer which I'm FURIOUS over. The whole reason I bought this phone was because of that app. Samsung has a built in spam blocker and caller id for FREE. now it's gone.
Click to expand...
Click to collapse
Why don't you just change your CSC to something other than Verizon?
@HyperChick Can you suggest, how did you able to get all the bands unlocked? I'm in a different country for a while and the bands this country has are different from the used in US.
Thanks!
jatin21 said:
@HyperChick Can you suggest, how did you able to get all the bands unlocked? I'm in a different country for a while and the bands this country has are different from the used in US.
Thanks!
Click to expand...
Click to collapse
I followed the instructions in the thread here
peacey8 said:
All the US CSCs are in one bundle CSC called OYM. So your CSC correct. If you look under the service provider info, it says VZW/VZW/VZW/XAA, which is correct as you're on the VZW CSC.
Verizon doesn't seem to have released One UI 5 yet (the firmware isn't released yet), so that's probably why you're not getting updated. You can take your SIM out, switch to TMB CSC with SamFW tool then check for updates (TMB already has 5 released), then put your SIM back in and it will switch back to VZW automatically.
For SamFW to work, make sure you enabled ADB in debugging mode. It should find it, if not, then check your cable or make sure to install Samsung drivers first.
Click to expand...
Click to collapse
Not true. I am on Verizon and got Android 13/OneUI 5 back in late October/early November.
HyperChick said:
Ok so after much labor, I got the update on my phone. Now I think I locked it to Verizon which I'm pissed as hell over. I lost my Samsung dialer and I have Verizon's dialer which I'm FURIOUS over. The whole reason I bought this phone was because of that app. Samsung has a built in spam blocker and caller id for FREE. now it's gone.
Click to expand...
Click to collapse
If the dialer is a green icon with a white phone, it is the Samsung dialer. Verizon does not have its own dialer. Verizon also has built in spam filter and caller ID for free too. I've been using them for years. Furthermore, my daughter's S22 is unlocked (purchased directly from Samsung) and has the caller ID and spam filtering and has been on Android 13/OneUI since November.
FInally, if the phone was bought as unlocked from Samsung and not the Verizon version (which you can also purchase directly from Samsung), it is not locked to Verizon.
That's fixable. You can download the patched Odin and refresh your unlocked OS. I did the exact same thing trying to update to Android 13.
gernerttl said:
Not true. I am on Verizon and got Android 13/OneUI 5 back in late October/early November.
Click to expand...
Click to collapse
My post that you replied to is from early November. How can it not be true when you just confirmed it?
peacey8 said:
My post that you replied to is from early November. How can it not be true when you just confirmed it?
Click to expand...
Click to collapse
I did not see that you posted it on Nov 8. Verizon actually pushed it out in October. My daughter's unlocked S22 got it about 3ish weeks later.
I originally posted about it on Oct 24.
Android 13 Update (Verizon)
System Update 11 is live for Verizon S22 Ultra. Downloading now.
forum.xda-developers.com

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