Which part of the firmware influences cellular signal quality? - Samsung Galaxy S9 Questions & Answers

is it the CP or the CSC? I have a korean 'N' S9 but I live in a country that gets the International 'F' devices, and my data network speed is garbage compared to the local samsung devices, and I was wondering whether this was a firmware issue or a hardware issue (as in the components in the korean version are somewhat different).

Coomer91 said:
is it the CP or the CSC? I have a korean 'N' S9 but I live in a country that gets the International 'F' devices, and my data network speed is garbage compared to the local samsung devices, and I was wondering whether this was a firmware issue or a hardware issue (as in the components in the korean version are somewhat different).
Click to expand...
Click to collapse
radio firmware and band selection found not within firmware, rather its located in the service menu. *#2263#
BEWARE tho. There are things in that menu that if you eff them up, theyre no un-effing them up

Hello I have a similar issue :
I bought a SM-G960U to use in a country where we normaly use the 960F version..... The caracteristics of both phone are similar for GSM/UMTS/LTE and should be compatible, but my G960U has a very poor signal reception, and a very bad speed for LTE/4G
Is It possible to flash the G960U with a 960F ROM ? Will It improve something ?

yan74s said:
Hello I have a similar issue :
I bought a SM-G960U to use in a country where we normaly use the 960F version..... The caracteristics of both phone are similar for GSM/UMTS/LTE and should be compatible, but my G960U has a very poor signal reception, and a very bad speed for LTE/4G
Is It possible to flash the G960U with a 960F ROM ? Will It improve something ?
Click to expand...
Click to collapse
well, technically..... its possible, but for the sake of conversation, no. You cant flash a F ROM on a U device. The issue youre having is due to the LTE bands enabled on the phone. The only way to change those is with the service menu, which i do not know how to navigate on this phone. To get to the service menu, go to the dialer and enter *#2263# and itll bring up the service menu which is only navigable with the keypad. It should show you a menu with corresponding numbers, but DO NOT MESS AROUND IN THERE!!!
You have been warned, and im not kidding. If you mess stuff in that menu, it could be permanent and could brick your phone

OK, thanks for your advice .....
*#2263# doesn't work for me, but with *#0011# I can access to the "service mode" ... Is it the same than "service menu" you were talking about ?
I've found some informations here (sorry it's in french, and the video in spanish)
https://lafibre.info/4g/forcer-samsung-freq/
The problem is that to accesds the menu : the step 3 doesn'nt work (type Q and after 0000 ) the menu doesn't open in my phone

yan74s said:
OK, thanks for your advice .....
*#2263# doesn't work for me, but with *#0011# I can access to the "service mode" ... Is it the same than "service menu" you were talking about ?
I've found some informations here (sorry it's in french, and the video in spanish)
https://lafibre.info/4g/forcer-samsung-freq/
The problem is that to accesds the menu : the step 3 doesn'nt work (type Q and after 0000 ) the menu doesn't open in my phone
Click to expand...
Click to collapse
here, there are several *# code combinations that folks use come on over to this thread. Different phone, i know, but its just the + of the same device

Related

SECRET CODES - unlocked #Network selection solved

First of all, i think this section belongs to better group than general thats why i think that it should be in apps themes section..
as it serves a better purpose like of apps in knowing about our phone...
So here i present you the collection of codes that work on almost all galaxy devices - importantly GRAND
credit- well i am just a geek and have found this through google
The secret codes can be used for several purposes, such getting the info of your device, resetting call counter, manage connectivity and radio, getting battery data, software and hardware version, setting up touchscreen, testing some features, changing CSC codes, and lots more
1.THE BIG QUESTION - What was the date on which my phone was manufactured ?
-Open your phone’s dialer and type the following code: *#197328640#.
-In case it does not work for you, try this one: *#*#197328640#*#* . (WELL I DIDNT GET SUCCESS IN IT :laugh
-This will open the Service Mode menu on your Galaxy Grand.
-Select the option N. 2, that is “Version Info”.
- On the next screen, select ‘HW Version” (here HW means hardware).
-Now you will see another set of options on the next screen. Now tap on “Read CAL Date”, and bingo! You can now see the date of manufacture of your phone.
In my case, it was 20130128 i.e 28th january 2013 .
Other Secret Codes for Samsung Galaxy Devices:
*#06# Show IMEI Number
*#2222# HW Version
*#34971539# Camera Firmware settings
*#9900# Sysdump (Logfiles etc.)
*#0228# Battery diagnostics
*#7353# Function testing
*#197328640# Service Mode Menu
*2767*3855# Factory Reset (not tested)
*#34971539# Camera Firmware Menu
*#197328640# – Service mode for testing
**05***# – Execute from Emergency dial screen to unlock PUK code
*#1234# View SW Version PDA, CSC, MODEM
*#03# -- NAND Flash S/N
*#350# -- Reboot
*#0011# -- ServiceMode [1]
*#0228# -- Battery status
*#0283# -- Audio packet loopback test
*#0782# -- Real Time Clock Test
*#0842# -- Vibration Test
*#2663# -- Touchscreen FW and version
*#7284# -- Phone Utility (USB Settings) // WASNT ABLE TO UNDERSTAND-if u can please advise.
*#7353# -- Self Test (Menu of 12 tests to use)
*#7594# -- Factory mode >>>>Enable shutdown on long press
*#8888# -- Service Mode (Read FTA hw version)
*#232338# -- WLAN MAC address & PS mode
*#22558463# -- Reset Total Call Time
*#12580*369# -- Main Version (AP, CP, CSC, RF cal, HW Rev) (similar to 9999)
##NETWORK SELECTING ON NON-INDIAN FIRMWARES## :cyclops:
well this work on indian firmware too-- i havent tried though
1.dial *#197328640#
2.now the option no. 5 &6 are for band selection
option no.5- is for sim1
option no-6- is for sim 2
3. now choose the one in which u want to make 3g only... in my case it was sim 2.. so i chose option no.6
4. newt select wcdma band
5. now select wcdma all band
AND YOU ARE DONE
Cool...
Nyc wrk bro..!!
Stay blessed..!!
Sent from my GT-I9082 using xda premium
Great information dude
read this article
u will come to know what is phoneutil i.e. *#7284#
http://galaxys4root.com/galaxy-s4-t...aws-bands-on-att-galaxy-s4-sgh-i337sgh-i337m/
TotalCall Time
Hy Guys
Thanks for help.
I need a information if is possible:
I need to reset the TotalCallTime on some devices from Samsung. I try *#22558463# and i get de time call for ex: 2h0m0s, but how to reset this time call?
This is because i send devices to warranty reseller and if the device have more than 1h they don´t accept...
Best Reguards
Aj.GaLaxY aCE said:
First of all, i think this section belongs to better group than general thats why i think that it should be in apps themes section..
as it serves a better purpose like of apps in knowing about our phone...
So here i present you the collection of codes that work on almost all galaxy devices - importantly GRAND
credit- well i am just a geek and have found this through google
The secret codes can be used for several purposes, such getting the info of your device, resetting call counter, manage connectivity and radio, getting battery data, software and hardware version, setting up touchscreen, testing some features, changing CSC codes, and lots more
1.THE BIG QUESTION - What was the date on which my phone was manufactured ?
-Open your phone’s dialer and type the following code: *#197328640#.
-In case it does not work for you, try this one: *#*#197328640#*#* . (WELL I DIDNT GET SUCCESS IN IT :laugh
-This will open the Service Mode menu on your Galaxy Grand.
-Select the option N. 2, that is “Version Info”.
- On the next screen, select ‘HW Version” (here HW means hardware).
-Now you will see another set of options on the next screen. Now tap on “Read CAL Date”, and bingo! You can now see the date of manufacture of your phone.
In my case, it was 20130128 i.e 28th january 2013 .
Other Secret Codes for Samsung Galaxy Devices:
*#06# Show IMEI Number
*#2222# HW Version
*#34971539# Camera Firmware settings
*#9900# Sysdump (Logfiles etc.)
*#0228# Battery diagnostics
*#7353# Function testing
*#197328640# Service Mode Menu
*2767*3855# Factory Reset (not tested)
*#34971539# Camera Firmware Menu
*#197328640# – Service mode for testing
**05***# – Execute from Emergency dial screen to unlock PUK code
*#1234# View SW Version PDA, CSC, MODEM
*#03# -- NAND Flash S/N
*#350# -- Reboot
*#0011# -- ServiceMode [1]
*#0228# -- Battery status
*#0283# -- Audio packet loopback test
*#0782# -- Real Time Clock Test
*#0842# -- Vibration Test
*#2663# -- Touchscreen FW and version
*#7284# -- Phone Utility (USB Settings) // WASNT ABLE TO UNDERSTAND-if u can please advise.
*#7353# -- Self Test (Menu of 12 tests to use)
*#7594# -- Factory mode >>>>Enable shutdown on long press
*#8888# -- Service Mode (Read FTA hw version)
*#232338# -- WLAN MAC address & PS mode
*#22558463# -- Reset Total Call Time
*#12580*369# -- Main Version (AP, CP, CSC, RF cal, HW Rev) (similar to 9999)
##NETWORK SELECTING ON NON-INDIAN FIRMWARES## :cyclops:
well this work on indian firmware too-- i havent tried though
1.dial *#197328640#
2.now the option no. 5 &6 are for band selection
option no.5- is for sim1
option no-6- is for sim 2
3. now choose the one in which u want to make 3g only... in my case it was sim 2.. so i chose option no.6
4. newt select wcdma band
5. now select wcdma all band
AND YOU ARE DONE
Click to expand...
Click to collapse
hey,could you please tell me why i receive "mobile network not available" while trying a code like *#0808#? s4mini i9195
Aj.GaLaxY aCE said:
First of all, i think this section belongs to better group than general thats why i think that it should be in apps themes section..
as it serves a better purpose like of apps in knowing about our phone...
So here i present you the collection of codes that work on almost all galaxy devices - importantly GRAND
credit- well i am just a geek and have found this through google
The secret codes can be used for several purposes, such getting the info of your device, resetting call counter, manage connectivity and radio, getting battery data, software and hardware version, setting up touchscreen, testing some features, changing CSC codes, and lots more
1.THE BIG QUESTION - What was the date on which my phone was manufactured ?
-Open your phone’s dialer and type the following code: *#197328640#.
-In case it does not work for you, try this one: *#*#197328640#*#* . (WELL I DIDNT GET SUCCESS IN IT :laugh
-This will open the Service Mode menu on your Galaxy Grand.
-Select the option N. 2, that is “Version Info”.
- On the next screen, select ‘HW Version” (here HW means hardware).
-Now you will see another set of options on the next screen. Now tap on “Read CAL Date”, and bingo! You can now see the date of manufacture of your phone.
In my case, it was 20130128 i.e 28th january 2013 .
Other Secret Codes for Samsung Galaxy Devices:
*#06# Show IMEI Number
*#2222# HW Version
*#34971539# Camera Firmware settings
*#9900# Sysdump (Logfiles etc.)
*#0228# Battery diagnostics
*#7353# Function testing
*#197328640# Service Mode Menu
*2767*3855# Factory Reset (not tested)
*#34971539# Camera Firmware Menu
*#197328640# – Service mode for testing
**05***# – Execute from Emergency dial screen to unlock PUK code
*#1234# View SW Version PDA, CSC, MODEM
*#03# -- NAND Flash S/N
*#350# -- Reboot
*#0011# -- ServiceMode [1]
*#0228# -- Battery status
*#0283# -- Audio packet loopback test
*#0782# -- Real Time Clock Test
*#0842# -- Vibration Test
*#2663# -- Touchscreen FW and version
*#7284# -- Phone Utility (USB Settings) // WASNT ABLE TO UNDERSTAND-if u can please advise.
*#7353# -- Self Test (Menu of 12 tests to use)
*#7594# -- Factory mode >>>>Enable shutdown on long press
*#8888# -- Service Mode (Read FTA hw version)
*#232338# -- WLAN MAC address & PS mode
*#22558463# -- Reset Total Call Time
*#12580*369# -- Main Version (AP, CP, CSC, RF cal, HW Rev) (similar to 9999)
##NETWORK SELECTING ON NON-INDIAN FIRMWARES## :cyclops:
well this work on indian firmware too-- i havent tried though
1.dial *#197328640#
2.now the option no. 5 &6 are for band selection
option no.5- is for sim1
option no-6- is for sim 2
3. now choose the one in which u want to make 3g only... in my case it was sim 2.. so i chose option no.6
4. newt select wcdma band
5. now select wcdma all band
AND YOU ARE DONE
Click to expand...
Click to collapse
hello,
there is some way in order to add/enable the LTE band 4 to my S5 Duos sm-g900fd ?
thanks
thnx
I want to unlock samsung grand prime which is not asking for any network code but is network locked. It is asking device unlock app to unlock the phone.
*#2263# is for the Samsung network select screen.
i bought a samsung j1ace that was network blocked by the service provider becaue the previous owner didnt pay his mobile contract. How do i unblock this phone, it wont read sim cards. but works on wireless, not for calling though
Plz help me the code *#7284# not working i can not use the code on my Samsung j1 lte
plz give me engineering mode code for samsung galaxy grand max 7202.
because i change my network for 4g jio sim.
plz give me engineering mode code.
---------- Post added at 12:20 PM ---------- Previous post was at 11:36 AM ----------
*#197328640# & *#*#197328640#*#*
i will try this code but its not work in my grand max phone plz give better suggestion for my phone.
how to run indian sim in samsung gt 19082 reply fast
Sim Unlock
Help please, how can i unlock sim my galaxy grand duos?
But how to make sim 1 3g again
zipikiki said:
Hy Guys
Thanks for help.
I need a information if is possible:
I need to reset the TotalCallTime on some devices from Samsung. I try *#22558463# and i get de time call for ex: 2h0m0s, but how to reset this time call?
This is because i send devices to warranty reseller and if the device have more than 1h they don´t accept...
Best Reguards
Click to expand...
Click to collapse
There used to be a way earlier, but somehow it does not work anymore. Though I have forgotten it too.
Dimmh said:
hey,could you please tell me why i receive "mobile network not available" while trying a code like *#0808#? s4mini i9195
Click to expand...
Click to collapse
Then there is some issue in your network SIM. I mean see if your SIM is activated, maybe it is not recognising in the S4 Mini.
thepinkpanter said:
hello,
there is some way in order to add/enable the LTE band 4 to my S5 Duos sm-g900fd ?
thanks
Click to expand...
Click to collapse
No. S5 Duos does not support LTE.
syed_21 said:
I want to unlock samsung grand prime which is not asking for any network code but is network locked. It is asking device unlock app to unlock the phone.
Click to expand...
Click to collapse
EH? Unable to get what you are asking for here!
skumdog said:
*#2263# is for the Samsung network select screen.
Click to expand...
Click to collapse
Yes!
JustROx said:
i bought a samsung j1ace that was network blocked by the service provider becaue the previous owner didnt pay his mobile contract. How do i unblock this phone, it wont read sim cards. but works on wireless, not for calling though
Click to expand...
Click to collapse
Root and install a custom ROM. Or root and remove the .bin file for the network code blocker.
haseeb12345678910 said:
Plz help me the code *#7284# not working i can not use the code on my Samsung j1 lte
Click to expand...
Click to collapse
It is not for J1.
loveacharya said:
plz give me engineering mode code for samsung galaxy grand max 7202.
because i change my network for 4g jio sim.
plz give me engineering mode code.
---------- Post added at 12:20 PM ---------- Previous post was at 11:36 AM ----------
*#197328640# & *#*#197328640#*#*
i will try this code but its not work in my grand max phone plz give better suggestion for my phone.
Click to expand...
Click to collapse
I too searched a lot for it, unable to locate it mate.
navin239780 said:
how to run indian sim in samsung gt 19082 reply fast
Click to expand...
Click to collapse
Normally, the same way you would so in any other phone.
lelouch0131 said:
Help please, how can i unlock sim my galaxy grand duos?
Click to expand...
Click to collapse
Root it, the best way. Install custom rom then.
Namanyoyo said:
But how to make sim 1 3g again
Click to expand...
Click to collapse
Settings > SIM & Mobile > Sim 1 > Network selection > Choose wcdma/gsm mode.
Hi. If ANYONE can plz help me sim unlock my s5 neo email me plz asap [email protected]
Engrining cood for j5 6 phone
Hello gays I have Samsung j56 16gb Mobil how I can encaraz volume with cood can you plz send me engrining cood for Samsung j5 6
Help me, my samsung galaxy grand prime, gives me a massage saying not registered on the network when i dail a number. But when i try 2 register it on the network it says network not available

[Q] LTE network mode on samsung galaxy tab s doesn't exist

hi, i have samsung galaxy tab s 8.4 T705 LTE version..
recently, my country (Indonesia) released LTE on band 8..
i want to turn on the LTE but i couldn't find LTE network mode in setting..
i just found WCDMA/GSM,WCDMA only, and GSM only..
but i can turn on the LTE network using *#2263# and put checklist on LTE band..
why in my tab s LTE network mode doesn't exist?
do you have any solution to enable LTE network mode on setting?
need help badly..:crying::crying:
ald03 said:
hi, i have samsung galaxy tab s 8.4 T705 LTE version..
recently, my country (Indonesia) released LTE on band 8..
i want to turn on the LTE but i couldn't find LTE network mode in setting..
i just found WCDMA/GSM,WCDMA only, and GSM only..
but i can turn on the LTE network using *#2263# and put checklist on LTE band..
why in my tab s LTE network mode doesn't exist?
do you have any solution to enable LTE network mode on setting?
need help badly..:crying::crying:
Click to expand...
Click to collapse
Exynos or Snapdragon chipset in your Tab?
pinsb said:
Exynos or Snapdragon chipset in your Tab?
Click to expand...
Click to collapse
my tab is exynos..
i have to use *#2263# to turn on the LTE, it's annoying..
Samsung Galaxy tab s 8.4 T705
Hi,
I have the same problem. In networks there is no option for LTE mode.
I try method to dial *#2263# but I received error: Connection Problem or Invalid MMI Code
My Samsung is whit Exynos processor.
What can I do?
Samsung Indonesia email response :
Please be patience, firmware update is coming.
No future date promised......
pijar60 said:
Samsung Indonesia email response :
Please be patience, firmware update is coming.
No future date promised......
Click to expand...
Click to collapse
Take a look through my SkyHigh ROM thread. I think I might have your CSC as an Aroma install option. This is what I believe you need.
A CSC changer app might also help (root also required) but will wipe your data.
Having the correct CSC should enable the options in device settings, as well as automatically settings your APN & MMS
Edit: just checked my ROM. Your CSC isn't listed but Singapore might work for you. Just guessing though.
UpInTheAir said:
Take a look through my SkyHigh ROM thread. I think I might have your CSC as an Aroma install option. This is what I believe you need.
A CSC changer app might also help (root also required) but will wipe your data.
Having the correct CSC should enable the options in device settings, as well as automatically settings your APN & MMS
Edit: just checked my ROM. Your CSC isn't listed but Singapore might work for you. Just guessing though.
Click to expand...
Click to collapse
Have successfully set the LTE mode and tested out with success by using *#2236#, at least temporary measure has been found. Thanks everyone for your advise and assistance.
tried code also but lte doesn't appear. can anybody help m .
pinsb said:
Exynos or Snapdragon chipset in your Tab?
Click to expand...
Click to collapse
Lte doesn't appea . Can any body help it ou .

[Q] Changing ROM Region?

From my device:
AP: T325ZSU1BNK1
CP: T325ZSU1BNK1
CSC: T325OZS1BNK1
Baseband version T325ZSU1BNK1
Kernel version [email protected]#1 Tue Nov 11 21:20:55 KST 2014
Build number KOT49H.T325ZSU1BNK1
I live and work primarily in the United States, and realize there's no official US ROM for this device, which I purchased new from eBay. However--given that I speak English--I wonder: are there ANY advantages or disadvantages to switching to a ROM designed for a largely English-speaking region (e.g., UK)? As I understand it, to avoid tripping KNOX, I'd need to use a ROM dated no later than the one presently installed on my device. I've rooted my device using the Towelroot app and directions so nicely detailed elsewhere on this site. But, I'm not clear what practical differences exist between the various regional ROMs. Can anyone clarify for me?
Many thanks.
XAR is the regional code for usa, all regional roms are almost similar but vary a little depending on rules amd regulations of given country, apart from this i have no idea about others.
Sent from my LG-D800 using XDA Free mobile app
like poster above said XAR is US / English, it's also known as Cellular South.
otyg said:
like poster above said XAR is US / English, it's also known as Cellular South.
Click to expand...
Click to collapse
Thanks. And sorry. Looking at my original post, I find that I neglected to mention my device name, but only provided the ROM version. Mea culpa. I have the SM-T325 (LTE), for which there's no US-based carrier support, AFAIK, and no XAR ROM on the sammobile site. Unless I've just missed it.
I know there's a trick which can enable US English without rooting as long as EN-US existed in framework-res.APK.
If you just need EN-US language, you can use some simple commands which is required for morelocales2 (no rooting required).
If you need to enable English on the tablet then just go to
Settings -> Controls (3rd tab) -> Language and Input ( First item on left pane) -> Then it will say Language in the right pane (first item) click it and you should be-able to select English.
otyg said:
If you need to enable English on the tablet then just go to
Settings -> Controls (3rd tab) -> Language and Input ( First item on left pane) -> Then it will say Language in the right pane (first item) click it and you should be-able to select English.
Click to expand...
Click to collapse
Thanks. The Tablet arrived NIB "speaking English," so that's never been an issue. I merely wondered if there was any reason to consider changing to a different ROM. Sounds like not.
SM-T325 LTE said:
Thanks. The Tablet arrived NIB "speaking English," so that's never been an issue. I merely wondered if there was any reason to consider changing to a different ROM. Sounds like not.
Click to expand...
Click to collapse
As far as I know, I don't think there is a difference besides probably minor things (like default language) , even my Note 3 n9005 I bought at walmat in the US had the United Arab Emirates firmware installed in it and it still worked with my USA carrier

Carrier firmware

I currently have the US s20Ultra unlocked model on ATT (don't foresee changing carriers). Currently I am missing features like VoLTE and VVM. What other features would I be missing if I stay on the unlocked firmware? Can I flash the ATT firmware to get those missing features? Can I flash back to unlock?
Thank you
What's the CSC on your device?
varcor said:
What's the CSC on your device?
Click to expand...
Click to collapse
I am not sure what I am looking for. Its currently on ATT/ATT.
Open your dialer, enter *#1234#, press the Dial Icon. You'll see CSC: G98??, the next 3 letters will be your device's CSC Code. Your Service Provider's CSC is "ATT" which is different than the CSC in your device. Whether or not you can change the CSC depends on your device's CSC. Device firmware is always configured for the specific, original CSC or Multi CSC's.
This post may be the best workaround.
https://forum.xda-developers.com/showpost.php?p=82444733&postcount=8
varcor said:
Open your dialer, enter *#1234#, press the Dial Icon. You'll see CSC: G98??, the next 3 letters will be your device's CSC Code. Your Service Provider's CSC is "ATT" which is different than the CSC in your device. Whether or not you can change the CSC depends on your device's CSC. Device firmware is always configured for the specific, original CSC or Multi CSC's.
This post may be the best workaround.
https://forum.xda-developers.com/showpost.php?p=82444733&postcount=8
Click to expand...
Click to collapse
My CSC: G988U1OYM1ATE4
garyHal said:
My CSC: G988U1OYM1ATE4
Click to expand...
Click to collapse
Your device has Multiple CSC's which are included in OYM so you should be able to change your CSC to ATT, which is the CSC for AT&T.
Go to "Settings" then "About phone". Write down your IMEI Number. Open dialer and enter *#272*IMEInumber# (In the thread replace IMEInumber with your actual IMEI Number). Press the Dial Icon, you should see a screen with the list of available CSC codes for your device. Select ATT and tap the Install option.
Be aware your firmware isn't AT&T, it's unbranded so even if you change the CSC, full call functionality may not be available. You can obtain AT&T's firmware at SamMobile.
https://www.sammobile.com/samsung/galaxy-s20-ultra/firmware/SM-G988U1/ATT/
varcor said:
Your device has Multiple CSC's which are included in OYM so you should be able to change your CSC to ATT, which is the CSC for AT&T.
Go to "Settings" then "About phone". Write down your IMEI Number. Open dialer and enter *#272*IMEInumber# (In the thread replace IMEInumber with your actual IMEI Number). Press the Dial Icon, you should see a screen with the list of available CSC codes for your device. Select ATT and tap the Install option.
Be aware your firmware isn't AT&T, it's unbranded so even if you change the CSC, full call functionality may not be available. You can obtain AT&T's firmware at SamMobile.
https://www.sammobile.com/samsung/galaxy-s20-ultra/firmware/SM-G988U1/ATT/
Click to expand...
Click to collapse
Varcor, thank you so much for all the directions.
As it stands right now, it is already on ATT. Once I flash over to the ATT firmware, would I be able to flash back to an unbranded one in the future, for whatever reason? Additionally, do I have to stay on the ATT firmware to retain those features? Or could just having my phone communicate with ATT at least once with my "branded" phone and then flash back retain those features?
garyHal said:
Varcor, thank you so much for all the directions.
As it stands right now, it is already on ATT. Once I flash over to the ATT firmware, would I be able to flash back to an unbranded one in the future, for whatever reason? Additionally, do I have to stay on the ATT firmware to retain those features? Or could just having my phone communicate with ATT at least once with my "branded" phone and then flash back retain those features?
Click to expand...
Click to collapse
You're most welcome. Yes, flashing back to unbranded won't be a problem. I don't think you will be able to retain the features if you go back to the unbranded firmware, it's not configured to allow full call feature functionality. Also, after flashing to the AT&T firmware you may need to contact their CSR for external programing. Good luck!
S20+ AT&T
Hi Varcor,
I'm new in this firmware things. I'm from Singapore and has been using S20 Exynos, but due to the extreme heat, bad battery life,etc. I've decided to import S20+ Snapdragon from AT&T, according to the Service provider SW ver information, it's showing as SAOMC_SM-G986U-OYN_ATT_QQ_0023 (I believe this means the set are unlocked).
With that said, I noticed that the software is outdated and the security patch level is on February 1,2020. when I referring to the AT&T website, It's showing as the latest software is QP1A.190711.020.G986USQU1ATE6 (June update) and mine still on QP1A.190711.020..G986USQU1ATAW (February). My CSC is G986UOYN1ATAW.
My question now is, whenever I tried to hit the software update, it's keep telling me that my software is up to date. Is there's a reason why it's wont detect the update? If it's because I'm in Singapore not US, then there's no choice that I need to flash using the firmware from Sammobile. The problem is which one that I need to download as AT&T carrier is not listed there. There's only T-mobile, Sprint, Unknown, USA. Please help.
https://www.sammobile.com/samsung/galaxy-s20-plus/firmware/#SM-G986U
Raigar said:
Hi Varcor,
I'm new in this firmware things. I'm from Singapore and has been using S20 Exynos, but due to the extreme heat, bad battery life,etc. I've decided to import S20+ Snapdragon from AT&T, according to the Service provider SW ver information, it's showing as SAOMC_SM-G986U-OYN_ATT_QQ_0023 (I believe this means the set are unlocked).
With that said, I noticed that the software is outdated and the security patch level is on February 1,2020. when I referring to the AT&T website, It's showing as the latest software is QP1A.190711.020SAOMC_SM-G986U-OYN_ATT_QQ_0023 (June update) and mine still on QP1A.190711.020..G986USQU1ATAW (February). My CSC is G986UOYN1ATAW.
My question now is, whenever I tried to hit the software update, it's keep telling me that my software is up to date. Is there's a reason why it's wont detect the update? If it's because I'm in Singapore not US, then there's no choice that I need to flash using the firmware from Sammobile. The problem is which one that I need to download as AT&T carrier is not listed there. There's only T-mobile, Sprint, Unknown, USA. Please help.
https://www.sammobile.com/samsung/galaxy-s20-plus/firmware/#SM-G986U
Click to expand...
Click to collapse
I would reach out to SamMobile and inquire why they're not listing the AT&T Firmware Update. You state your CSC is G986UOYN1ATAW. That CSC is also associated with T-Mobile. You're not using an AT&T SIM Card, correct? On a Multi-CSC Device when you insert a different SIM, the device should update to the correct Service Provider. If you're using a SIM from a Service Provider other than AT&T you probably won't receive AT&T Software Updates, which are distributed by Samsung, not AT&T via OTA.
varcor said:
I would reach out to SamMobile and inquire why they're not listing the AT&T Firmware Update. You state your CSC is G986UOYN1ATAW. That CSC is also associated with T-Mobile. You're not using an AT&T SIM Card, correct? On a Multi-CSC Device when you insert a different SIM, the device should update to the correct Service Provider. If you're using a SIM from a Service Provider other than AT&T you probably won't receive AT&T Software Updates, which are distributed by Samsung, not AT&T via OTA.
Click to expand...
Click to collapse
I did try to reach them, but for some reason they are giving me some irrelevant answer. Something like "You probably don't get OTA-updates (otherwise you got them already from AT&T)". We are having a conversation breakdown there, I think they are not an english speaker (or my english is just bad). Really? that CSC is associated with T-Mobile? now I'm getting more confused because the box is stated AT&T and it's sealed.
I'm using Singapore SIM card (Singtel), so you were saying this set I'm using right now is a Multi-CSC device? If i were to flash to the other carrier firmware, will it create any problem?
Raigar said:
I did try to reach them, but for some reason they are giving me some irrelevant answer. Something like "You probably don't get OTA-updates (otherwise you got them already from AT&T)". We are having a conversation breakdown there, I think they are not an english speaker (or my english is just bad). Really? that CSC is associated with T-Mobile? now I'm getting more confused because the box is stated AT&T and it's sealed.
I'm using Singapore SIM card (Singtel), so you were saying this set I'm using right now is a Multi-CSC device? If i were to flash to the other carrier firmware, will it create any problem?
Click to expand...
Click to collapse
Flashing Singtel Firmware won't work since it's configured for the Exynos SoC. Multi-SIM Devices have only regional Service Providers available, you don't have Singtel as an option in an AT&T device. Based on your situation I would consider one of two options. The first would be insert an AT&T SIM just for OTA updates. Not sure if you received an AT&T SIM when you purchased the device, if you didn't they're not hard to find. The second and likely best option is sell the device and purchase a Global Variant with a Snapdragon SoC, you'll receive updates regardless of your Service Provider. If it makes you feel any better there's lots of users in the same predicament. They want the Snapdragon device in regions selling mainly Exynos devices. Workarounds are in many situations are challenging,
varcor said:
Your device has Multiple CSC's which are included in OYM so you should be able to change your CSC to ATT, which is the CSC for AT&T.
Go to "Settings" then "About phone". Write down your IMEI Number. Open dialer and enter *#272*IMEInumber# (In the thread replace IMEInumber with your actual IMEI Number). Press the Dial Icon, you should see a screen with the list of available CSC codes for your device. Select ATT and tap the Install option.
Be aware your firmware isn't AT&T, it's unbranded so even if you change the CSC, full call functionality may not be available. You can obtain AT&T's firmware at SamMobile.
https://www.sammobile.com/samsung/galaxy-s20-ultra/firmware/SM-G988U1/ATT/
Click to expand...
Click to collapse
Varcor
I have the exact same phone and using the same network as garyHal, unlocked 988U1/OYM/ATT.
I got my bootloader unlocked and decided to apply the ATT firmware (
G988U1UES1BTJ2). My CSC was already ATT so I didn't perform the csc install step.
After setting the phone up as new, it still seems like its running the unlocked mode. I don't see any kind of branding or extra ATT stuff that may have been downloaded. How do I verify that I have the right firmware and CSC set to ATT?
Thank you.
itchyUnder said:
Varcor
I have the exact same phone and using the same network as garyHal, unlocked 988U1/OYM/ATT.
I got my bootloader unlocked and decided to apply the ATT firmware (
G988U1UES1BTJ2). My CSC was already ATT so I didn't perform the csc install step.
After setting the phone up as new, it still seems like its running the unlocked mode. I don't see any kind of branding or extra ATT stuff that may have been downloaded. How do I verify that I have the right firmware and CSC set to ATT?
Thank you.
Click to expand...
Click to collapse
How did you manage to unlock your bootloader since US Snapdragon variants are locked down pretty tight? I don't think the firmware is dedicated to ATT, it's Multi CSC, designed to function with a number of US Carriers. You should be delighted you're not suffering with ATT bloatware! To check the Active CSC go to About Phone, Settings, Software Information, Service Provider SW ver. On the bottom string the first three letters are the Active CSC on your device. You can review this article for additional information on Firmware and CSC's.
CSC and Home_CSC | All You Need to Know About ODIN Samsung Flash
Here is all you need to know about the CSC and Home_CSC.What exactly is a Firmware?A firmware is nothing but a permanent software which is programme
www.getdroidtips.com
varcor said:
How did you manage to unlock your bootloader since US Snapdragon variants are locked down pretty tight? I don't think the firmware is dedicated to ATT, it's Multi CSC, designed to function with a number of US Carriers. You should be delighted you're not suffering with ATT bloatware! To check the Active CSC go to About Phone, Settings, Software Information, Service Provider SW ver. On the bottom string the first three letters are the Active CSC on your device. You can review this article for additional information on Firmware and CSC's.
CSC and Home_CSC | All You Need to Know About ODIN Samsung Flash
Here is all you need to know about the CSC and Home_CSC.What exactly is a Firmware?A firmware is nothing but a permanent software which is programme
www.getdroidtips.com
Click to expand...
Click to collapse
If I am reading it correctly, this is what I am seeing:
ATT/ATT/XAA
I am happy that I don't have the ATT bloatware but I also feel that ATT is locking me out of some of their features because I don't have a "branded" phone, such as wifi call or visual voicemail. Am I misunderstanding your post from above, #6, that flashing ATT firmware would give me the carrier features?
Additionally, does the firmware determine what frequency bands I am using and if I am taking full advantage of ATT's offerings?
itchyUnder said:
If I am reading it correctly, this is what I am seeing:
ATT/ATT/XAA
I am happy that I don't have the ATT bloatware but I also feel that ATT is locking me out of some of their features because I don't have a "branded" phone, such as wifi call or visual voicemail. Am I misunderstanding your post from above, #6, that flashing ATT firmware would give me the carrier features?
Additionally, does the firmware determine what frequency bands I am using and if I am taking full advantage of ATT's offerings?
Click to expand...
Click to collapse
Flashing ATT Dedicated Firmware would give you the best chance for additional call features ASSUMING your Ulocked Device is capable of incorporating those features. It should do the trick since the hardware is identical to an ATT device. I would head to an ATT Store to get a definitive answer. Samsung has made it more and more challenging to mix and match branded and unlocked devices with CSC or Firmware modifications. In many cases you won't know until you try. Users want their smartphones to be smart, to work perfectly in every situation but the major carriers use proprietary tools to hold clients hostage.
varcor said:
Open your dialer, enter *#1234#, press the Dial Icon. You'll see CSC: G98??, the next 3 letters will be your device's CSC Code. Your Service Provider's CSC is "ATT" which is different than the CSC in your device. Whether or not you can change the CSC depends on your device's CSC. Device firmware is always configured for the specific, original CSC or Multi CSC's.
This post may be the best workaround.
https://forum.xda-developers.com/showpost.php?p=82444733&postcount=8
Click to expand...
Click to collapse
Please bro i need a help
My note 20 ultra is ATT unlocked
Because I'm not in united state
But in section about phone
My model is N986U note U1
am searching sammobil to udate my phone to android 13
I found nothing at&t with my model number N986U
Only N986U1
What should I do to update to android 13
This should do the trick.
Download Samsung Galaxy Note 20 Ultra 5G SM-N986U USC USA (US Cellular) firmware
All Samsung firmwares for Galaxy Note 20 Ultra 5G in USA (US Cellular) with model code SM-N986U. We offer free and fast download options. Check them out now.
www.sammobile.com
romano_ezzat said:
Please bro i need a help
My note 20 ultra is ATT unlocked
Because I'm not in united state
But in section about phone
My model is N986U note U1
am searching sammobil to udate my phone to android 13
I found nothing at&t with my model number N986U
Only N986U1
What should I do to update to android 13
Click to expand...
Click to collapse
Download Samsung Galaxy Note 20 Ultra 5G SM-N986U USC USA (US Cellular) firmware
All Samsung firmwares for Galaxy Note 20 Ultra 5G in USA (US Cellular) with model code SM-N986U. We offer free and fast download options. Check them out now.
www.sammobile.com
varcor said:
This should do the trick.
Download Samsung Galaxy Note 20 Ultra 5G SM-N986U USC USA (US Cellular) firmware
All Samsung firmwares for Galaxy Note 20 Ultra 5G in USA (US Cellular) with model code SM-N986U. We offer free and fast download options. Check them out now.
www.sammobile.com
Click to expand...
Click to collapse
I misunderstanding
What a trick bro
It's a link for firmware updates
I need to know which one compatible with my note
And after flash will still unlocked?

Question Changing CSC for free using SamFW Tool | No Root required! - A brief guide!

As the title suggests, I was able to successfully change the CSC on my factory unlocked (unbranded) Fold 3 - F926B/DS bought in Germany with OXM firmware having Android 13 & one UI 5.0 from EUX to INU csc using SamFW Tool v3.31 in hardly 2-3 mins. Kindly note that I also looked into other options to do this like Samkey tool (paid service) and alliance shield app (which doesn't work anymore) etc before engaging with the SamFW Tool as none were simple/working with no complications whatsoever involved.
My main objective to change the CSC was to enable call recording and couple of other features (including some pleasant surprises listed in the end of the post) which were available in the INU csc with little to no hassle. The process was pretty simple, straight forward and most importantly, FREE . It DOESN'T require any factory reset, flashing of roms or wiping cache partition before or after the process.
The step by step guide process which worked for me is as follows:
STEP 1: Click here - SamFW Tool Download - to download the latest version of SamFW tool.
STEP 2: Remove the sim card and connect your phone to a computer and make sure the phone's drivers are installed.
STEP 3: Unzip the downloaded file. Right click on the file SamFwFRPTool.exe and 'Run as Administrator'.
STEP 4: After the software opens, make sure your phone is detected before proceeding. If its detected, click on ADB tab in the software.
STEP 5: In your phone, go to developer options and enable 'usb debugging'.
STEP 6: In your phone, open phone dialer and type *#0*# to get into test mode. Leave the phone unlocked and keep it aside now.
STEP 7: Click on 'Change CSC' button in the ADB tab of the tool. Now the tool will connect to your phone, check and list the available CSCs which your phone model supports as shown in the pic attached.
STEP 8: Choose a CSC which you wish to change to from the drop down menu in the pop-up window as shown in the pic attached.
NOTE: The tool also has the option to force the phone to accept a CSC not listed/supported as well by manually entering the same. However, I would not recommend doing it if you really wish to get OTA updates and also to evade any unforeseen issues. I must admit, I haven't frankly tried this and do not know what lies in the pandora box to be honest.
STEP 9: After choosing the CSC from the drop down, the tool quickly connects to the phone, changes the CSC and restarts the phone.
STEP 10: After the phone restarts, unlock the phone using your pin/password, insert your simcard, check the change of CSC in software information, disconnect the phone from the computer and also disable the 'usb debugging' in the developer options.
That's it! All done. Phone restarts with the new chosen CSC and the related features will now be active!
BONUS: There is also an option in the ADB tab in the SamFW Tool named 'Battery information' which gives the complete information of the battery status including the 'charge/discharge cycles' along with its temperature, voltage etc. like in the pic attached. Do note that the information shown in the 'Genuine battery' section isn't correct for some reason and always shows as 'NO' for any phone with/without genuine battery.
With my choice of INU csc the following major changes/surprises were noticed over the EUX:
1. Call recording and a couple of other INU specific features are now enabled (google for more info on what csc enables what features).
2. Not sure why but Battery backup has increased significantly after the csc change to INU. SOT (Screen On Time) which has fallen to 3-4 hrs after the OTA update to One Ui 5.0 & Android 13 is now back to 5-7hrs or more.
3. RAM management has definitely got better. With EUX csc it used be around 5-6GB during standby and now its always around 3-4GB when the phone is idle.
4. Instead of 4G or 4G+, now it shows LTE and LTE+.
5. Mobile data speed has increased both in 5G (Jio True5G network) and in LTE+ when compared to EUX CSC.
6. 5G signal strength has improved drastically. Signal loss or switching to 4G+/LTE+ is very low now.
7. 5G to 4G/LTE switching while calls (VoLTE/VoNR) is more seamless now. Latching back onto 5G network after a call is a breeze now unlike earlier with EUX csc.
8. Phone definitely got faster for some reason. Can very much feel the difference when switching between apps, multi-tasking, even opening/closing apps and other day-to-day tasks.
etc...
Haven't tested whether the OTA updates will still get pushed after the change in CSC yet, as my phone is already updated to the latest patch as I write this. Should absolutely work IMO as long as we choose a CSC which the phone supports but in any case will update the thread once the next update via OTA is available/pushed by Samsung.
Disclaimer: Please be informed that all the above information is purely based on experience of using the tool for changing CSC only which worked well for me with my Fold 3. Cannot take responsibility if it doesn't work for you.
Does it work for Fold 4. Want to change CSC from Korean Region to INU (India). Please guide
Sorry, haven't tried it on Fold 4. Logically it shud work, I guess. There is no harm in connecting n checking what CSCs does ur model supports using the tool IMO.
Tried out but it does not work. It shows only the Korean csc. Even that seems to be not changing
Oh k. I think the tool works, else u wudnt b seeing the CSC which ur phone supports.
I have checked sources in the web as well on this and looks like Fold 3 or 4 with Korean CSC supports only CSC from Korea.
I guess u can still force a CSC on to it replacing the Korean one but thats too risky as u will b missing OTA updates and im not aure wat all things it will mess up.
Awesome! It works and it doesn't wipe the device. I just switched from G975U VZW to CCT without any issues.
BlueTR said:
Awesome! It works and it doesn't wipe the device. I just switched from G975U VZW to CCT without any issues.
Click to expand...
Click to collapse
Happy to hear that. BTW I also got samsung pay/wallet to work as well by installing its apk file today after changing the system language to a local one specific to the changed CSC i.e., English (India) for INU CSC in my case.
I confirm that it is working on a stock android 13! Great tool!
(It worked on the second try though )
Has anyone tired it on a Fold 4, Mine is XAA and I want to convert it to INU. Haven't been abe to do it as yet.
Let me know if someone finds a way, mine is a US version and I want to convert it to the India CSU.
Thanks in advance
unexpected0ne said:
I confirm that it is working on a stock android 13! Great tool!
(It worked on the second try though )
Click to expand...
Click to collapse
Good to know! Just out of curiosity, u tried this on a Fold 3 or Fold 4?
srikanth.addala said:
Good to know! Just out of curiosity, u tried this on a Fold 3 or Fold 4?
Click to expand...
Click to collapse
Fold 3, latest official android 13
unexpected0ne said:
Fold 3, latest official android 13
Click to expand...
Click to collapse
Oh great. Getting otas after the change?
Does OTA work after change?
Hello, can somebody please briefly summerise the options for switching the CSC/Firmware?
I read other threads and this one and now am confused which method actually would work for me.
My situation: i have a Samsung A52s 5G purchased from Deutsche Telekom in Germany, sold separately, not bundled with a contract.
And i am having a contract with a different carrier on a different network, but a german SIM card.
My phone is configured all english, and i need to keep that.
Because of assumed network optimisations and the problem of delayed updates of "branded" phones, i would like to convert the phone from the current CSC of DTM to the DBT using fimrware (A528BXXS1DVL2/A528BOXM1DVK5/A528BXXU1DVK5/A528BXXS1DVL2), which i hope would link me to updates directly provided by Samsung.
I found "https://forum.xda-developers.com/t/...official-firmware-all-samsung-device.2697238/" and "https://forum.xda-developers.com/t/...-multi-csc-codes.4436853/page-5#post-87485577 ", but i am not sure whther the methods described there only apply for UPDATING (within the same CSC) the phone with non-OTA methods, or whether that also covers SWITCHING the CSC?
In the end i have two questions:
1) So far i believed that "simply" putting an official stock Samsung firmware (multi CSC in my case, containing the DBT, but apparently NOT containing the DTM) would bring me there.
But then i read that this might not be suffficient. Instead i also would have to switch the CSC in my Phone's config, which apparently would require purchasing a license for a Samkey unlock code.
Because otherwise i would not receive any OTA updates once i switched just the firmware.
Is that actually true?
I would prefer not to have to buy a Samkey...
And to make the confusion even bigger: now i read, SamFw Tool would also be an option?
But: is that trustworthy? And: from posts of some of you: this might even obsolete to switch the firmware, do i understand that right?
2) If switching firmware still is required: would using Odin/Heimdall be the only option to switch the firmware, or would adb sideloading do the same job as well? I am asking because i don't have access to a windows machine.
Would be so great if someone of you could untangle my confusion a bit, thank you.
MarkoParkovic said:
Does OTA work after change?
Click to expand...
Click to collapse
Did not automatically receive the OTA updates with the recent DVL9 update. However, tried a work around to change the CSC back to EUX via the same tool (which is a 2 min task) to check if I can get OTA again.
And yes it worked! immediately after changing the OTA to its home CSC, was able to see OTA in the updates section of the phone. So, I updated the phone to the latest version (DVL9) and then changed the CSC back to INU after the update . All is well and quick! .
very nice i changed sfr to tur but netflix and always on display app not shown google play so unsupported why idk
burc ugur said:
very nice i changed sfr to tur but netflix and always on display app not shown google play so unsupported why idk
Click to expand...
Click to collapse
May be TUR csc has restricted options/features. In my example after I changed to INU csc (India one) all the India related options got automatically activated like call recording, spam filter, samsung pay using cards etc etc. which weren't available with the EUX csc before the change.
srikanth.addala said:
May be TUR csc has restricted options/features. In my example after I changed to INU csc (India one) all the India related options got automatically activated like call recording, spam filter, samsung pay using cards etc etc. which weren't available with the EUX csc before the change.
Click to expand...
Click to collapse
Any potential issues using INU csc in the UK? I use Samsung pay already but native call recoding would be really useful for me
srikanth.addala said:
May be TUR csc has restricted options/features. In my example after I changed to INU csc (India one) all the India related options got automatically activated like call recording, spam filter, samsung pay using cards etc etc. which weren't available with the EUX csc before the change.
Click to expand...
Click to collapse
edit: excuse me you have play protect certificate? i changed csc samfw topl but now i don't have play protect certificate. Therefore not shown Netflix.
you have this? if you have how can i fix certificate.
burc ugur said:
edit: excuse me you have play protect certificate? i changed csc samfw topl but now i don't have play protect certificate. Therefore not shown Netflix.
you have this? if you have how can i fix certificate.
Click to expand...
Click to collapse
Might be worth clearing cache and data from Google play services see if that helps. Having the same device with 2 different cscs might have confused Google
Edit
Any reason your Google play store is out of date or is it connected to your original issue

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