Issue: using 3 in the UK and they are running LTE Bands 3 and 20. I am looking at my wife's phone next to mine and she is camped on 3's Band 20. I am using an N900t and it won't allow me to enable those bands, even when forcing to either of them in the service mode. I'm running the OB6 firmware, CSC, and bootloader. The ROM is an Alliance TW 5.0 with TWRP as my recovery. I've also enabled CA as well as LTE Rev 10 to no avail.
I don't know much about how this OS works, but I am thinking that the baseband is reading the CSC and disabling the OCONUS LTE Bands, which is why they won't enable in the service mode. There is no other CSC for that firmware on sammobile, and I've read that flashing a mismatched CSC can cause incompatibility issues.
Thoughts?
The more I research, the more I'm confused. Can I use a CSC changer to change to the 3 UK region? I understand this will wipe the phone, but then will a nandroid backup reinstall everything on top of the CSC or well a nandroid replace the CSC? Will/should I have issues with a TMO fw/bl and non-TMO CSC?
CSC is a custom sales code. You can try changing it but I don't think this will help because the phone's software works with the installed modem software. Changing the csc doesn't change the modem software.
I thought the modem, to speak generally, was the set of drivers needed for everything to communicate correctly, while the CSC was the region and brand-specific coding that include the bands in which the hardware should search. Not correct? There are other stories of people flashing different region files and then have access to other bands.
The CSC is something added to the ROM to make it carrier specific. For instance, adding a T-Mobile USA CSC to an AT&T Samsung s4 will not allow the S4 to connect to T-mobile's network. Additional software modifications must be made to enable these additional frequency bands.
You can try to change the CSC but the CSC must exist for the particular carrier on the particular phone.
The good thing is that, from what I've read, there exists an international note 3 on 3's network. Does that mean, since it exists, I need to flash the international fw/bl and csc? I think it's the 9005.
The n9005 and T-Mobile note 3 support different frequencies and the n9005 has never been able to receive LTE in North America, regardless of what is done through software changes.
You will not be able to flash the bootloader via Odin but you may be able to flash it via TWRP. However, flashing an n9005 bootloader onto the n900t will probably hardbrick the phone and I advise against cross-flashing bootloaders.
"Hard-brick" as in unrecoverable or I'll just have to start over?
Hard brick means having it fixed at a repair shop, if possible.
Related
What are the steps to flash g930u on g930v?
I just purchased S7 from the ebay. Unfortunately it is a verizon version and I am not a fan to say at least. I am on ATT and also planning to travel, so I need many more LTE bands than G930V has. It is running G930VVZW4BRC3
- is it true that additional LTE bands can be enabled on any Qualcomm device? If not, at least I want to flash G930U onto G930V to get rid of crapware.
- I had downloaded the latest G930U firmware from the updato.com G930UUEU4BRD1. Is that the files to flash or are there various files around here on XDA, with fixes applied
- Do I just flash all the files from the zip via Odin?
is this guide still relevant? https://www.reddit.com/r/GalaxyS7/comments/5izd45/snapdragon_flash_unlocked_u_firmware_with_other/
If you flash a newer U variant than your V variant that should be all that's needed. I went directly from BRA1 Verizon to BRA1 U AT&T without issue
Edit: As for odin files, plenty of builds out there but make sure you go with one ~2gb in size. Otherwise itll just be a partial update (~200mb normally). U and V are identical hardware so you won't get software issues other than xyz carrier app not being there (or depending on provider of SIM, data might also be an issue).
Reddit link looks valid but it's basically "get odin and flash your build that would work given your current software and model" (I had to go to generic V variant firmware from U before returning to verizon V variant as Verizon's recovery didn't like the U model). If issues, try different builds or different Odins
Thanks!
What confused me the most is: https://www.phonemore.com/compare/p...m-g930v-vs-samsung-galaxy-s7-sm-g930a/3257631
Basically, it looks like g930v is missing some of the LTE bands.
I was able to install the latest G930U firmware, but now it is proving itself rather hard to verify what band my phone is using. It says LTE, but plenty of apps claim to display the LTE band, but none seem to do so.
JupoozunEd3 said:
Thanks!
What confused me the most is: https://www.phonemore.com/compare/p...m-g930v-vs-samsung-galaxy-s7-sm-g930a/3257631
Basically, it looks like g930v is missing some of the LTE bands.
I was able to install the latest G930U firmware, but now it is proving itself rather hard to verify what band my phone is using. It says LTE, but plenty of apps claim to display the LTE band, but none seem to do so.
Click to expand...
Click to collapse
https://forum.xda-developers.com/sp.../guide-enabling-additional-lte-bands-t3563474
this thread is a guide on how to enable certain bands on the phone being limited by firmware, as far as the hardware goes every s7 snapdragon have all the same contents just the firmware locking out to make it difficult to switch carriers.
kani!bal said:
https://forum.xda-developers.com/sp.../guide-enabling-additional-lte-bands-t3563474
this thread is a guide on how to enable certain bands on the phone being limited by firmware, as far as the hardware goes every s7 snapdragon have all the same contents just the firmware locking out to make it difficult to switch carriers.
Click to expand...
Click to collapse
I figured it out. There is a code *#2263# that displays the band information. However, if SIM is in, it complains that "RAT selection is locked,". By removing the SIM, and rebooting, the *#2263# works and you can enable/disable bands.
hi, when i bought my n920a it had firmware 6.0.1 but with cs XSG of the arab emirates but now i can not flash this csc anymore. How should I do? also when I downloaded samsung flow did not make me use fingerprints because it said that I had done the root previously but I had already bought it so. Is there a way to root?
Are you sure your device was originally an N920A? And have you ever flashed the stock AT&T Firmware to your device yourself manually?
I ask it like that because, if you went and bought a Rooted N920A from an older firmware and then flashed a newer stock firmware to the device, you definitely removed the carrier unlocked modem and reinstalled the AT&T CSC. The firmware does try to prevent all other firmwares from being used.
You may end up needing to flash the modem from the combination firmware in order to regain your carrier unlock status, that may allow you to flash another region's CSC. But you would want to use a Home CSC version if you can. One that doesn't include the PIT file with it. The Home CSC version typically does not contain a PIT file but has a meta data folder that accompanies the cache image. The Home CSC also doesn't require a device wipe.
But if you accidentally locked your unlocked phone, I hope you didn't flash an unrootable bootloader over a rooted bootloader. But using the Combination Firmware's Modem/CP should allow you to change carriers and manually adjust APN or Cellular Settings. Although it may mess up your wifi defaults until you mess with wpasupplicant.
Thanks, I installed the latest firmware available NRD90M. N920AUCS6ERH1. Is it no longer possible to downgrade?
...because I use the phone in Europe. Given the firmware is North America I was wondering whether I need to change the modem in ODIN to get better reception/ 5g in Europe. The last Samsung I owned was the S4 where updating the modem to your region was ubiquitary. Not sure if this is still necessary and doable., so hoping for some advice.
Second question: I have a US S20 locked to AT&T. Will flashing the U1 firmware (incl. factory reset) also unlock the phone?
Cheers!
tpunkttpunkt said:
...because I use the phone in Europe. Given the firmware is North America I was wondering whether I need to change the modem in ODIN to get better reception/ 5g in Europe. The last Samsung I owned was the S4 where updating the modem to your region was ubiquitary. Not sure if this is still necessary and doable., so hoping for some advice.
Second question: I have a US S20 locked to AT&T. Will flashing the U1 firmware (incl. factory reset) also unlock the phone?
Cheers!
Click to expand...
Click to collapse
You can't mix exynos firmware and Snapdragon. I doubt you can use just the modem portion of a European exynos code. You can flash U1 code freely, but that does not unlock the bootloader. Do you mean you can't put any sim other than AT&T?
I didn't mean to unlock the bootloader (since that's not possible for US phones) but the sim so I can use my German sim card in Europe in this phone.
tpunkttpunkt said:
I didn't mean to unlock the bootloader (since that's not possible for US phones) but the sim so I can use my German sim card in Europe in this phone.
Click to expand...
Click to collapse
Do you know if I run the risk to brick my device if I tried to combine the exynos modem with a snapdragon rom? Cause otherwise I might just try it.
I would appreciate if anyone can point me to the right direction. I have 21FE G990U2 from AT&T, It is unlocked by AT&T.
All I need is working T-Mobile firmware or Samsung (no carrier branding) to flash. I tried multiple versions of U, U1 and U3 firmwares (all matching my current Binary -4) but no success.
I just would like to get rid of ATT bloat. I know I can uninstall it via ADB but I rather have firmware clean of it.
Any suggestion please?
Thanks
So am I right to assume that you are looking for a G990U2 TMB firmware with Binary 4, to flash on a G990U2 AT&T phone?
If so, then you can download it from the below link by clicking on "Download Samfw server" (G990U2OYN4EWC3, April 2023 update):
Download Galaxy S21 FE 5G SM-G990U2 (TMB) G990U2SQS4EWC3 in Samfw - Samsung firmware download
Galaxy S21 FE 5G SM-G990U2 (TMB - United States) G990U2SQS4EWC3 T(Android 13) samsung firmware download all model, lastest, fast update, completely free and fast speed in Samfw.com ✅
samfw.com
or if I am assuming wrong, can you please correct my understanding? As I do not have any practical hands-on experience with the USA models.
Shuhan44 said:
So am I right to assume that you are looking for a G990U2 TMB firmware with Binary 4, to flash on a G990U2 AT&T phone?
If so, then you can download it from the below link directly (G990U2OYN4EWC3, April 2023 update):
https://02-samsung.cloud/v2/IxJCDiMnLh8SLAo5IRtBAzwDMyMyCB4lFzssIDs2ByAzMUEgOzEUQDMQMCMBOyw/LiUzJjIXCDkuJC8/NDseIy8xIQYzOAIlPDAVHRIvMz81CAIkMwsuOB42FA00Nh4LNS8vFjIXLA0NFzE/PAMeOTMADTkDAC4mNBEaMCExQQEhJQUUHjFCMTs4BkIjCyI/Iws8MQEWCDAeCw0xCREHOTQbIyshAD4OIQAGLC44Hiw0ER4OMiUzLDIlDSs8AD4fJhsGOg8HCkA8AywnCRc+Di8LBxAzBy4RDxYpKTwkHjUeBylCJgceKTIXIUAJER4OMi8+AwMSMBsBAzY5LwNBJi8IMAQ4MTQUAQMgLyMsHjM7JDMHLzEjJDgAISk8PxQ9NTggQiYbLyUhJCEpMjsHJzw2KSceFy4QIzEvKw8WIAYhFh4JMjAeLDQsLCM0Gy45IzgGQiMDPB0jJCI/ARYFMCMiExM=
or if I am assuming wrong, can you please correct my understanding? As I do not have any practical hands-on experience with the USA models.
Click to expand...
Click to collapse
You are correct - I need T-Mobile (or carrier free) so I can utilize full carrier settings.
Thanks for the link, however above link gives an error when opening the page.
Nevertheless I will look for TMB firmware with CSC: G990U2OYN4EWC3 and post an update here
Flashed that and still has AT&T boot logo and all the apps
h078 said:
Flashed that and still has AT&T boot logo and all the apps
Click to expand...
Click to collapse
Well, I am sure that you have flashed by a Factory reset (Flashed CSC, not Home CSC in ODIN). The boot logo can be changed by rooting your device, also bloatware apps can be deleted via ADB command without rooting.. but you already have mentioned that you prefer not to proceed with those processes. So I am out of suggestions, sorry.
Just for my knowledge, after flashing the TMB firmware, now your settings> About phone> software information> service provider software version: 2nd line shows as TMB/ TMB/ AT&T?
(Also corrected the download link in my previous comment anyway).
Yes, you are correct i did flash CSC, not home CSC. Then I reflashed w home CSC but software still says ATT/ATT/ATT.
Moreover on Bootloader screen says "carrier ATT" - I have never seen that before on any Samsung phone that I had. I have no clue how did they lock up device that well. As for removing software via ADB that is not a problem, but ATT locks network selection mode so you cant choose between 5G, LTE, 3G etc..
TMobile in US still supports EDGE and sometimes it comes handy - whereas ATT has only LTE and 5G as they re-farmed EDGE and 3G/HSPA frequencies
h078 said:
Yes, you are correct i did flash CSC, not home CSC. Then I reflashed w home CSC but software still says ATT/ATT/ATT.
Moreover on Bootloader screen says "carrier ATT" - I have never seen that before on any Samsung phone that I had. I have no clue how did they lock up device that well. As for removing software via ADB that is not a problem, but ATT locks network selection mode so you cant choose between 5G, LTE, 3G etc..
TMobile in US still supports EDGE and sometimes it comes handy - whereas ATT has only LTE and 5G as they re-farmed EDGE and 3G/HSPA frequencies
Click to expand...
Click to collapse
I do not get why the CSC can never be changed, even after flashing the complete firmware... must be an ATT thing!
Anyway, to change the csc only, there is another very quick & easy method. It takes only 2/3 minutes; no flash or factory reset is required. You have to download and install a small software "SamFW Tool" on your pc/laptop (may need to disable the antivirus during the download/install process). Once done, connect the phone and enable USB debugging mode. Open the software, under the ADB tab, click Change CSC, from the dropdown list select TMB and click Change. The phone will restart and CSC "Should" change to TMB/TMB/ATT.
Here is the download link for the software:
https://www.mediafire.com/file/upaiwadhmstm6js/SamFwToolSetup_v4.6.zip/file
That did the trick. I have T-Mobile CSC now
Thanks a lot
h078 said:
That did the trick. I have T-Mobile CSC now
Thanks a lot
Click to expand...
Click to collapse
Great!
But still, that's only one part of the final solution I think. Your target was to replace the complete firmware from ATT to TMB, right? Since the CSC is now changed to TMB, I think you can give it another try via ODIN to install the TMB firmware now (only if you want). I am not confident that it will work now, but still, one last try should not be much of a hassle.
I think that these multi CSC contain all US carrier customizations....When I changed it to TMB it shows TMB/TMB/ATT and loads bootlogo as well as TMobile apps... I guess it is similar as Blackberry used to be back in the days...Depending which carrier SIM used it loaded proper settings from the firmware...
I have flash my METROPCS G990U2 to G990U3,other sim card work fine,but t mobile sim card does not work ,can someone help me?I already change CSC to xxa,but still no internet,I do have sginal bar
I have an SM-S901N, unlocked snapdragon from South Korea, bought it last summer and rooted successfully using the method here. I've been running rooted, updating periodically with odin, everything works just fine. Except...
I'm in the US and use Verizon Wireless. The two features I miss: wifi calling and visual voicemail. These are both only available with the VZW firmware.
The U1 is also an unlocked snapdragon. Can I flash the U1 VZW firmware on my N and get these two Verizon features? Even better, can I use the HOME_CSC from VZW and change the CSC without a wipe? I've seen mixed info on whether you can successfully change CSC using odin without wiping, and have it stick. I assume the Verizon-specific features will require the CSC to be set to VZW in addition to everything else.
Your phone will die if you try