Hopefully there is someone here more knowledgeable than myself that can help me. I recently ordered an S9+ SM-G9650 model from amazon with the intent of unlocking the bootloader, etc. When I got it, everything looked alright, but I got to a point in the setup when I couldn't progress without putting in a sim card. I did and it rebooted twice, one of those times showing a blue screen that from my research seems to be related to CSC and changing the software region based on the sim card inserted. My sim card is a US Tracfone AT&T version sim card by the way. After that, I finished setting up the phone and found the model number to be SM-G965U1. I have factory reset from the bootloader and from within android to no avail. From my research the CSC region change thing can only change the CSC values to certain values based on the phone's actual model number, and not the model number itself. What I am saying is, is it possible that my US sim card somehow changed my phone from the bootloader-unlockable SM-G9650 model to the locked SM-G965U1 model, or did I actually receive the wrong model device?
cosmogroid said:
Hopefully there is someone here more knowledgeable than myself that can help me. I recently ordered an S9+ SM-G9650 model from amazon with the intent of unlocking the bootloader, etc. When I got it, everything looked alright, but I got to a point in the setup when I couldn't progress without putting in a sim card. I did and it rebooted twice, one of those times showing a blue screen that from my research seems to be related to CSC and changing the software region based on the sim card inserted. My sim card is a US Tracfone AT&T version sim card by the way. After that, I finished setting up the phone and found the model number to be SM-G965U1. I have factory reset from the bootloader and from within android to no avail. From my research the CSC region change thing can only change the CSC values to certain values based on the phone's actual model number, and not the model number itself. What I am saying is, is it possible that my US sim card somehow changed my phone from the bootloader-unlockable SM-G9650 model to the locked SM-G965U1 model, or did I actually receive the wrong model device?
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Click to collapse
More than likely wrong model. It didn't change the bootloader. I run a9650 on cricket. I would send it back and raise hell i see this happen a lot
Related
Hey guys - so my brother-in-law gave me an 'unlocked' i717 that was running the stock AT&T Android (he says he was using it with another carrier). I did some research and used CWM to put CM Android 4.2.2 on there. Thinking I'm all good, I ordered a SIM card from Ting and ported over my Verizon number to it. I go to use the SIM card and the phone prompts me for a SIM unlock code! In doing some more research, I found that I should have a Baseband Version, but that currently reads as 'unknown'. I DO have a IMEI number, though.
So what are my options? I've found a few threads about flashing a radio, would that clear up the SIM unlock problem or just give me a Baseband version? Again, according to my brother-in-law he has used this on other carriers than AT&T.
Thanks in advance!
A modem flash and adjustment of your APN settings may do the trick....
Those two items are required for a carrier change...g
I bought an unlocked s9+ from ebay and later found out that its country sale came from Panama. My canadian GSM network does work on the device, but certain apps like samsung members show spanish promotions or samsung pay not being available.
Can the csc code and country be changed in this case?
Model: SM-G9650
CPU: Snapdragon 845
Did you setup the phone and then inserted your sim card? I believe that now that you have your sim card in, if you make a factory reset to your phone, your csc will change to the csc of your country/sim card.
I live in Greece, I bought my phone (international exynos s9+ unlocked) from an international seller and the csc was ITV (from Italy). I inserted my sim card, factory reseted the phone with the sim card in, and when the factory reset was completed my csc was changed to EUR (Greece).
You can try it.
madvinegar said:
Did you setup the phone and then inserted your sim card? I believe that now that you have your sim card in, if you make a factory reset to your phone, your csc will change to the csc of your country/sim card.
I live in Greece, I bought my phone (international exynos s9+ unlocked) from an international seller and the csc was ITV (from Italy). I inserted my sim card, factory reseted the phone with the sim card in, and when the factory reset was completed my csc was changed to EUR (Greece).
You can try it.
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Click to collapse
I will update the result on this solution after i try it.
madvinegar said:
Did you setup the phone and then inserted your sim card? I believe that now that you have your sim card in, if you make a factory reset to your phone, your csc will change to the csc of your country/sim card.
I live in Greece, I bought my phone (international exynos s9+ unlocked) from an international seller and the csc was ITV (from Italy). I inserted my sim card, factory reseted the phone with the sim card in, and when the factory reset was completed my csc was changed to EUR (Greece).
You can try it.
Click to expand...
Click to collapse
Did not work, unfortunately.
bosejry said:
Did not work, unfortunately.
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Click to collapse
This might be your best option.
https://forum.xda-developers.com/galaxy-s9-plus/how-to/g9650-snapdragon-csc-change-stock-t3815136
varcor said:
This might be your best option.
https://forum.xda-developers.com/galaxy-s9-plus/how-to/g9650-snapdragon-csc-change-stock-t3815136
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Click to collapse
Have you tried this method, and has it worked?
bosejry said:
Have you tried this method, and has it worked?
Click to expand...
Click to collapse
No, I haven't however I would ask Lukesky1313 since it's his method. It would seem it's either this option or flashing a custom ROM which will eliminate functionality of Knox, Samsung Pay, Secure Folder, Samsung Health and possibly others.
I recently unlocked my Galaxy J7 Sky Pro from the tracfone carrier (called them, got two codes, put them in and device said it is now unlocked).
Now when I try to insert a different sim card the phone seems to have no service, even though the sim card is recognized (asks me for the pin and logs in properly). In fact that sim card is a prepaid european one, from the german carrier O2, but since J7 Sky Pro can do LTE connection I though that should work fine?
What do you guys think, is there something I could do to fix the issue?
My exact model is:
SM-S727VL
And android version is:
6.0.1
One kind of annoying thing is that even though I unlocked the phone, it still shows the tracfone logo on startup. Maybe the firmware is preventing the european sim card to connect to a tower? Is there some "international" version of firmware I could update to to make it work?
Thanks for any suggestion!
I purchase a like-new condition Samsung Galaxy S9+ phone from Amazon Warehouse for international travel coming up in couple days. I figured I would have a better chance of getting an authentic phone from Amazon than from ebay sellers. I received the phone yesterday, and here is the situation with the phone:
- The box of the phone says "unlocked by Samsung"
- The sticker on the back of the phone has the model # SM-G965UZBAXAA and IMEI number of a factory unlocked phone
- The actual IMEI of the phone however shows model # SM-G965UZBAATT, which corresponds to the AT&T carrier locked phone
- When I turn on the phone, it shows T-mobile screen and has T-mobile apps on it
How do I determine whether this is a AT&T phone, or a T-mobile phone or something else? Unfortunately, I do not have either TMO or ATT sim cards that I can use to check which network the phone works on. How do I know whether this phone is unlocked and if it is will work internationally? I am not sure how to explain the imei of the phone coming up with ATT model number, yet the phone shows TMO screen.
Please help as I need to get this resolved today, and don't have time to purchase another phone. Thanks much in advance!!
prince_a1 said:
I purchase a like-new condition Samsung Galaxy S9+ phone from Amazon Warehouse for international travel coming up in couple days. I figured I would have a better chance of getting an authentic phone from Amazon than from ebay sellers. I received the phone yesterday, and here is the situation with the phone:
- The box of the phone says "unlocked by Samsung"
- The sticker on the back of the phone has the model # SM-G965UZBAXAA and IMEI number of a factory unlocked phone
- The actual IMEI of the phone however shows model # SM-G965UZBAATT, which corresponds to the AT&T carrier locked phone
- When I turn on the phone, it shows T-mobile screen and has T-mobile apps on it
How do I determine whether this is a AT&T phone, or a T-mobile phone or something else? Unfortunately, I do not have either TMO or ATT sim cards that I can use to check which network the phone works on. How do I know whether this phone is unlocked and if it is will work internationally? I am not sure how to explain the imei of the phone coming up with ATT model number, yet the phone shows TMO screen.
Please help as I need to get this resolved today, and don't have time to purchase another phone. Thanks much in advance!!
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Click to collapse
put any sim in it and it should work these phones are multi carrier means all the us models are the same if its att imei id say its unlocked since obviously last used was t mobile but if you put any sim in it other than att it should accept it and not say unnsuported sim and or ask for unlock code
to further this as i said the us models are all the same. They have a file called CSC which determines carrier based settings you can put in a tmobile sim and it will repersonalize for tmobile then swap to att and att will show up..
Its the way of the future and actually quite nice as one firmware pretty much covers all carriers other than specific user data which is that carriers apps
it may be unlocked obviously the listing was wrong but xaa is factory unlocked for sims, You can reflash xaa if it is unlocked for non carrier branding,But id put any sim in and see
TheMadScientist said:
They have a file called CSC which determines carrier based settings you can put in a tmobile sim and it will repersonalize for tmobile then swap to att and att will show up..
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Click to collapse
Thanks for your response. So if the previous owner put a T-mobile sim in the AT&T phone, then would it show the T-mobile screen at startup, and also have the T-mobile branded apps?
prince_a1 said:
Thanks for your response. So if the previous owner put a T-mobile sim in the AT&T phone, then would it show the T-mobile screen at startup, and also have the T-mobile branded apps?
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Click to collapse
Yes the csc files are multi carrier the phone will do a New sim inserted please reboot to apply new carrier configuration
and it will reboot and install the inserted sims carrier based bloat apps
TheMadScientist said:
Yes the csc files are multi carrier the phone will do a New sim inserted please reboot to apply new carrier configuration
and it will reboot and install the inserted sims carrier based bloat apps
Click to expand...
Click to collapse
Thanks again! Is it safe for me to do a factory reset on the phone? I wasn't sure if it was rooted and whether a factory reset might brick it. If I do a factory reset, what would it restore to - the AT&T or TMO configuration, or something else?
prince_a1 said:
Thanks again! Is it safe for me to do a factory reset on the phone? I wasn't sure if it was rooted and whether a factory reset might brick it. If I do a factory reset, what would it restore to - the AT&T or TMO configuration, or something else?
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Click to collapse
Yes its safe go into settings and account backup restore it should show factory data reset Thats the proper way to get rig of a google account on the device It will stay as is until a new sim is inserted factory resets have nothing to do with it
TheMadScientist said:
Yes its safe go into settings and account backup restore it should show factory data reset Thats the proper way to get rig of a google account on the device It will stay as is until a new sim is inserted factory resets have nothing to do with it
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Click to collapse
Thank you so much for the information! Highly appreciated!!
TheMadScientist said:
Yes the csc files are multi carrier the phone will do a New sim inserted please reboot to apply new carrier configuration
and it will reboot and install the inserted sims carrier based bloat apps
Click to expand...
Click to collapse
I downloaded the phoneinfo app, and here it what it shows:
Firmware's CSC code: XAA
Active CSC code: TMB
IMEI check shows model ending in: ATT
That made me highly confused as to whether this was a AT&T phone, a T-mobile phone or whether it was originally sold as factory unlocked.
prince_a1 said:
I downloaded the phoneinfo app, and here it what it shows:
Firmware's CSC code: XAA
Active CSC code: TMB
IMEI check shows model ending in: ATT
That made me highly confused as to whether this was a AT&T phone, a T-mobile phone or whether it was originally sold as factory unlocked.
Click to expand...
Click to collapse
So originally it was a att device. Who ever used it used it on tmobile but on xaa which is debloated unlocked
TheMadScientist said:
So originally it was a att device. Who ever used it used it on tmobile but on xaa which is debloated unlocked
Click to expand...
Click to collapse
Under Service Provider SW ver., it shows TMB/XAA/ATT
I am trying to understand what this means, why would it show TMB, XAA and ATT? Does it mean the phone was originally AT&T, then someone installed XAA firmware on it and used it on T-mobile. If that is true, is there a way for me to verify whether the current installed firmware is XAA?
prince_a1 said:
Under Service Provider SW ver., it shows TMB/XAA/ATT
I am trying to understand what this means, why would it show TMB, XAA and ATT? Does it mean the phone was originally AT&T, then someone installed XAA firmware on it and used it on T-mobile. If that is true, is there a way for me to verify whether the current installed firmware is XAA?
Click to expand...
Click to collapse
That is correct. You see it now. The third csc code is the original device. The second is what csc you have running. And the first is or was sim inserted.
Look in settings about phone and software info. At the bottom somewhere it should show you
TheMadScientist said:
That is correct. You see it now. The third csc code is the original device. The second is what csc you have running. And the first is or was sim inserted.
Look in settings about phone and software info. At the bottom somewhere it should show you
Click to expand...
Click to collapse
Yes, what I pasted above is from about phone->software info. It shows the service provider sw version as TMB/XAA/ATT. Thank you!!
What are the "TMB" and "USC" in the "Update info" links?
They're both US unlocked.
doc.samsungmobile.com/SM-S918U1/TMB/doc.html
doc.samsungmobile.com/SM-S918U1/USC/doc.html
They correspond to the CSC (Consumer software customization) determined by your SIM card. If you're on T-Mobile, you will see TMB. If your'e on US Cellular, you'll see USC. On an Unlocked U1 phone, there may be carrier specific changes with an update.
Guyinlaca said:
They correspond to the CSC (Consumer software customization) determined by your SIM card. If you're on T-Mobile, you will see TMB. If your'e on US Cellular, you'll see USC. On an Unlocked U1 phone, there may be carrier specific changes with an update.
Click to expand...
Click to collapse
And if someone changes their service, can the old updates that were for the old carrier pose a potential problem now that they're with the new carrier and receiving their updates?
When you remove the old SIM card and insert the new one, it will ask you to restart to apply the correct settings for your carrier. The SIM does the work for you.
Guyinlaca said:
When you remove the old SIM card and insert the new one, it will ask you to restart to apply the correct settings for your carrier. The SIM does the work for you.
Click to expand...
Click to collapse
I assumed that was just changing the APN and changing the carrier settings. But it actually undoes old updates and reinstalls them?
No. Every firmware and update has CSCs built in. It doesn't revert the software, it just activates features specific to your carrier (based on SIM). It's a partition of sorts.
Guyinlaca said:
No. Every firmware and update has CSCs built in. It doesn't revert the software, it just activates features specific to your carrier (based on SIM). It's a partition of sorts.
Click to expand...
Click to collapse
1) So when one switches from carrier one to carrier two, what happens to all the past updates that are associated with carrier one?
2) If the SIM card is removed and a new one isn't inserted (for instance if one's upgading to a new phone), will the future updates be "generic"? (Obviously when the old phone is in one's home with a wifi connection.)
1. Each U1 software update contains all US carrier CSC partitions. If you update from A7 to A8, and change SIM cards, you'd remain on A8, but the CSC partition switches to the new carrier. There is never any rolling back, merely switching from one partition to another.
2. If you remove the SIM, your phone updates using the previously set CSC. If you used a T-Mobile SIM, it stays on TMO. The default CSC on U1 is XAA and there's little reason to go back to it, though it can be done with certain tools.
Guyinlaca said:
1. Each U1 software update contains all US carrier CSC partitions. If you update from A7 to A8, and change SIM cards, you'd remain on A8, but the CSC partition switches to the new carrier. There is never any rolling back, merely switching from one partition to another.
2. If you remove the SIM, your phone updates using the previously set CSC. If you used a T-Mobile SIM, it stays on TMO. The default CSC on U1 is XAA and there's little reason to go back to it, though it can be done with certain tools.
Click to expand...
Click to collapse
Thank you.