Hello, I'm not a developer; I've never dealt with a rooted device, but Google, Samsung, Verizon and other sources were no help, so I'm here now.
I got a Samsung S20 FE from my old workplace which was previously locked to the ATT network. I am a Verizon customer so I wanted to switch over and I purchased an unlock code from cellunlocker.net. I've reached out to Cellunlocke, but they say the unlock was successful as it is connecting to the VZW network.
I did a factory reset on the phone, put in the Verizon Sim card, and used the network unlock code provided. The unlock said it was successful, but the phone powered on with the ATT logo and downloaded all the ATT factory apps. When I go into the phone dialer settings, it shows ATT video calling, etc... The phone software version shows ATT in the service provider sw version. But it makes calls, texts, etc. and the network settings show it's connected to VZW. The problem is, that it can't access my voicemail or use wifi calling because it's set with the ATT apps and features.
I've tried removing the sim, power cycling, factory resetting, even calling Verizon and asking them to resync the phone to the network. When the sim card is installed in the new phone, VZW shows the S20 as my device, but the phone still thinks it is on the ATT settings. I've viewed the Service Menu *#0011# and it shows that the phone is unlocked.
The phone is showing a service provider software version of
SAOMC_SM-G781U_OYN_ATT_12_0012
ATT/ATT/ATT
Is there any way to force the phone to reset its carrier settings or service provider software? Also, please keep it somewhat simple; I'm learning but not an expert here!
about the only wise thing you can do is download and XAA U1 firmware (Samsung non carrier firmware) flash that with Odin and call it good.
you're getting what you're seeing because the phone won't be able to switch to Verizon firmware as Verizon actually have their own unique version of the FE SM-G781V I believe with physical differences for Verizon's mmwave 5G and the U model can't reset itself to that.
3mel said:
about the only wise thing you can do is download and XAA U1 firmware (Samsung non carrier firmware) flash that with Odin and call it good.
you're getting what you're seeing because the phone won't be able to switch to Verizon firmware as Verizon actually have their own unique version of the FE SM-G781V I believe with physical differences for Verizon's mmwave 5G and the U model can't reset itself to that.
Click to expand...
Click to collapse
So which firmware version do I need? The model printed on the phone is SM-G781u. SamMobile has 781O, B, U, U1, and V for the 781 model.
I'd love to have it without the bloatware Verizon installs, but I need Wifi calling to work and it seems to be a setting in the dialer, rather than the phone.
tbrou6229 said:
So which firmware version do I need? The model printed on the phone is SM-G781u. SamMobile has 781O, B, U, U1, and V for the 781 model.
I'd love to have it without the bloatware Verizon installs, but I need Wifi calling to work and it seems to be a setting in the dialer, rather than the phone.
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Click to collapse
flashing V would be a bad idea, 5G wouldn't work, at least not well. so that leaves U1 which is Samsung unbranded, no carrier apps at all.
3mel said:
flashing V would be a bad idea, 5G wouldn't work, at least not well. so that leaves U1 which is Samsung unbranded, no carrier apps at all.
Click to expand...
Click to collapse
Ok thank you, I'll give it a shot
3mel said:
flashing V would be a bad idea, 5G wouldn't work, at least not well. so that leaves U1 which is Samsung unbranded, no carrier apps at all.
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Click to collapse
I'm looking at the instructions for flashing the device and the instructions say to turn on OEM Unlocking in developer options. I've activated developer options and USB debugging, but do not have the option to turn on OEM Unlocking.
I can't seem to find a way to unlock the bootloader.
tbrou6229 said:
I'm looking at the instructions for flashing the device and the instructions say to turn on OEM Unlocking in developer options. I've activated developer options and USB debugging, but do not have the option to turn on OEM Unlocking.
I can't seem to find a way to unlock the bootloader.
Click to expand...
Click to collapse
to the best of my knowledge you don't need to be unlocked in order to flash signed, official Samsung firmware. many Americans have cross-flashed their phones and none of them could unlock either.
you're just booting into download and opening Odin, it's not much more than that.
3mel said:
to the best of my knowledge you don't need to be unlocked in order to flash signed, official Samsung firmware. many Americans have cross-flashed their phones and none of them could unlock either.
you're just booting into download and opening Odin, it's not much more than that.
Click to expand...
Click to collapse
Awesome, a flash using ODIN seems to have worked; the phone is active and not showing any carrier apps or splash screen. I'm having some other issues; can you suggest which firmware combo would be best?
I used Sammobile.com SM-G781U1 with Country Code USA (Verizon) (VZW)
OR I also downloaded Frija SM-G781U1 with CSC of XAA
Will I notice any major differences in them, or just try each one and check it out?
I am in the US, using the Verizon network. We do not have 5g in the area but the phone and our verizon plan is 5G capable and I would like the option if it exists somewhere I travel to.
I am in the UK, I shouldn't be telling you anything about what firmware is gonna be best over there.
other than U1 XAA I can't tell you much. also be aware that generally you can never downgrade your firmware unless it has the same bootloader version as what you're currently using...
if we were looking at my firmware version number G781BXXU4FVE6
I can only flash something that has a matching 5th last character, that's a 4 in this case. I can only download and flash older firmware if it also has a 4 in the same place in the build number. the phone won't accept anything else.
Sammobile is good for seeing what firmware exists but it's terrible for download speeds. I use Frija mainly but that only gives me the latest version nothing historical.
@3mel thank you for all your help! I've got this device working well on the U1 software and didn't have to reflash it; the rest of my issues resolved. Thanks for your patience in helping this newbie do things to a phone I never would have attempted otherwise!
Related
First of all, thanks to Raymonf (I dont know his XDA Username) for making these Odin files. This new version of modded Odin allows for flashing custom and official tars AND also compressed binaries, which Samsung will be using in all Odin firmwares from Oreo on.
Oh and doing this doesnt wipe data if you do exactly what I wrote below.
1. Download your devices firmware from below
2. Enable USB debugging by going to settings > about phone > software info > click build number 7 times and enter your password
3. Open command prompt on your PC and type adb reboot bootloader
4. Open odin and select the AP, BL, CP, and HOME_CSC file in their corresponding locations
5. Start it
6. You are there!
To go back, do the exact same thing with the U firmware files!
Odin modded by Raymond: https://drive.google.com/file/d/1lOf_CGeSg7xTB6zgLAE95G9GPmzTv6EJ/view?usp=sharing
G960U1: http://samsung-updates.com/details/122036//SM-G960U1/XAA/G960U1UEU1ARBG.html
G965U1: http://samsung-updates.com/details/122548//SM-G965U1/XAA/G965U1UEU1ARBG.html
Reserved 2
Thank you for this. In all of the download mirrors for the s9+ the free download is unavailable. Is it asking to much to upload to a site that will offer free downloads?
dave812 said:
Thank you for this. In all of the download mirrors for the s9+ the free download is unavailable. Is it asking to much to upload to a site that will offer free downloads?
Click to expand...
Click to collapse
Any other links to download the U firmware?
What's the difference on the mod one?
tronxxixx said:
What's the difference on the mod one?
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Click to collapse
The modded/patched Odin has the model-ID and SHA hash check disabled, therefore allowing you to flash an unbranded "U1" firmware onto a branded "U" phone and vice versa.
As of now this works on most US Qualcom (QC) models, but an increasing number of international Exynos (EX) models now include a new RMM security which prevents this kind of cross-flashing unless you first disable the RMM, by flashing an RMM-Disabler package through TWRP.
billa said:
The modded/patched Odin has the model-ID and SHA hash check disabled, therefore allowing you to flash an unbranded "U1" firmware onto a branded "U" phone and vice versa.
As of now this works on most US Qualcom (QC) models, but an increasing number of international Exynos (EX) models now include a new RMM security which prevents this kind of cross-flashing unless you first disable the RMM, by flashing an RMM-Disabler package through TWRP.
Click to expand...
Click to collapse
Probably gives better chance to root huh?
What I'm not clear on is: after I flashed my factory unlocked s9 to the VZW U firmware to see if I could get video calling to work (it didn't) then flashing back to what has been described as stock U1 ARBG firmware, in my about phone it still says VZW/VZW/XAA. Is this set by the SIM. Will this only change when I put a different carriers SIM card into the phone?
Question, before i dive in...
My UICC is locked to Sprint right now (damn 50 day limit) and I was wondering, if I flash this U1 rom, would I be able to edit the APN? Has anyone else done this?
mc_365 said:
What I'm not clear on is: after I flashed my factory unlocked s9 to the VZW U firmware to see if I could get video calling to work (it didn't) then flashing back to what has been described as stock U1 ARBG firmware, in my about phone it still says VZW/VZW/XAA. Is this set by the SIM. Will this only change when I put a different carriers SIM card into the phone?
Click to expand...
Click to collapse
That's correct, the unbranded "U1" firmware sets the carrier parameters based on every different carrier sim card inserted.
Don't worry about the VZW/VZW/XAA, for all intended purposes the phone acts as Verizon phone.
It's just a flag, but if you can't sleep over it then do this while rooted:
adb shell su -c echo "VZW" > /efs/imei/mps_code.dat
adb shell su -c echo "VZW" > /efs/imei/omcnw_code.dat
VandyCWG said:
Question, before i dive in...
My UICC is locked to Sprint right now (damn 50 day limit) and I was wondering, if I flash this U1 rom, would I be able to edit the APN? Has anyone else done this?
Click to expand...
Click to collapse
Flashing the unbranded "U1" firmware will neither unlock the network nor the APN settings if you keep using a Sprint sim.
On the other hand, if you unlock the network and insert an AT&T or Tmobile sim then you should be able to edit the APN, but then again you don't have to edit it because it gets set automatically based on the type of sim inserted.
Thanks a lot, quick question, i have an at&t "U" model, manage to install the U1 software (wanna get rid of all the at&t apps), everything its working just fine, but when an update comes to the U1 model, can i install it the regular way on odin, or do a need to follow this steps again??
here's the link i use from another post to dowload the system a bit faster: https://androidfilehost.com/?w=files&flid=257047 greatings to the author.
Does doing this trip knox? I'm actually thinking of flashing Sprint firmware on my S9+ unlocked (XAA)
yeltrah123 said:
Does doing this trip knox? I'm actually thinking of flashing Sprint firmware on my S9+ unlocked (XAA)
Click to expand...
Click to collapse
Hasn't tripped my Knox but YMMV.
mc_365 said:
Hasn't tripped my Knox but YMMV.
Click to expand...
Click to collapse
Wait do you have the same XXA unlocked model variant and tried flashing it? I'm also assuming that YMMV means "Your Model May Vary"..
yeltrah123 said:
Wait do you have the same XXA unlocked model variant and tried flashing it? I'm also assuming that YMMV means "Your Model May Vary"..
Click to expand...
Click to collapse
Your Milage May Vary. I have a factory unlocked S9. When you flash firmware there are risk, don't hold me accountable if your Knox gets tripped some how. People hose their phones in flashing accidents then say someone gave them wrong info.
mc_365 said:
Your Milage May Vary. I have a factory unlocked S9. When you flash firmware there are risk, don't hold me accountable if your Knox gets tripped some how. People hose their phones in flashing accidents then say someone gave them wrong info.
Click to expand...
Click to collapse
I wouldn't blame you lol, yes I know there's a risk. But you have stated earlier that you flashed a firmware and it didn't trip knox, so I'm wondering if you flashed a carrier firmware "U" on your SM-G960U1 device..
yeltrah123 said:
Wait do you have the same XXA unlocked model variant and tried flashing it? I'm also assuming that YMMV means "Your Model May Vary"..
Click to expand...
Click to collapse
I'm glad to report that after flashing the Sprint firmware on my unlocked S9+ worked no issues and knox was not tripped. Now I've noticed that even though the Sprint splashscreen didn't show up at boot, while in setup the phone did detect the exact carrier I was on (Boost Mobile) and the phone showed the Boost Mobile splashscreen upon reboot and all the Boost Mobile apps as well as some bloatware loaded onto the phone as if it were a phone I purchased through them.
So if I flash my tmobile device to the u1 firmware can I then root my device and put twrp on it?
Is any root method available for the t-mobile version?
My dilemma. I purchased a S10+ unlocked from Samsung.com and I use it on the Sprint network. I am having data/cell problems like a lot of others are having. Samsung refuses to fix or replace the phone saying it will be fixed with an update. Sprint says they will replace my phone but it would be the Sprint version. If i do the replacement with Sprint can I later flash the U1 making it act like the unlocked version? No carrier bloat?
wraptor said:
My dilemma. I purchased a S10+ unlocked from Samsung.com and I use it on the Sprint network. I am having data/cell problems like a lot of others are having. Samsung refuses to fix or replace the phone saying it will be fixed with an update. Sprint says they will replace my phone but it would be the Sprint version. If i do the replacement with Sprint can I later flash the U1 making it act like the unlocked version? No carrier bloat?
Click to expand...
Click to collapse
Service issues with T Mobile and Sprint are known. Neither have been addressed since release. As for your question, yes, it's possible to convert a U SPR to U1 XAA (and vice versa). You will lose data following the use of non Home CSCs in Odin.
You can technically preserve all data, but it's strongly recommended to follow the steps as they're written.
E: firmware is here https://forum.xda-developers.com/galaxy-s10/how-to/s10e-g973u-g973u1-firmware-links-t3905852
You can also use Samfirm and other places.
Ace42 said:
Service issues with T Mobile and Sprint are known. Neither have been addressed since release. As for your question, yes, it's possible to convert a U SPR to U1 XAA (and vice versa). You will lose data following the use of non Home CSCs in Odin.
You can technically preserve all data, but it's strongly recommended to follow the steps as they're written.
E: firmware is here https://forum.xda-developers.com/galaxy-s10/how-to/s10e-g973u-g973u1-firmware-links-t3905852
You can also use Samfirm and other places.
Click to expand...
Click to collapse
Thank you for verifying this!
wraptor said:
Thank you for verifying this!
Click to expand...
Click to collapse
No prob. I converted my Tmobile N8 950U to U1. Bought an unlocked U1 S10+ so no need this time around.
I have the sprint variant as well of the s10. Would flashing this sim unlock the phone?
No
kennymase said:
I have the sprint variant as well of the s10. Would flashing this sim unlock the phone?
Click to expand...
Click to collapse
Nope. You're only changing the firmware on the phone, you're not unlocking anything.
Do I need to flash back to U1 unlocked firmware? When the buyer puts their Sim card in, will my current carrier (Cricket) splash screen remain or will it recognize their carrier and change?
If it is unlocked, the buyer can use with any carrier except cdma like verizon or sprint
ryan770 said:
Do I need to flash back to U1 unlocked firmware? When the buyer puts their Sim card in, will my current carrier (Cricket) splash screen remain or will it recognize their carrier and change?
Click to expand...
Click to collapse
Change back or don't advertise as unlocked firmware
Sent from my SM-G973U1 using Tapatalk
Is changing back that hard?
ryan770 said:
Do I need to flash back to U1 unlocked firmware? When the buyer puts their Sim card in, will my current carrier (Cricket) splash screen remain or will it recognize their carrier and change?
Click to expand...
Click to collapse
Just flash back to U1, it is more desirable.
Actually I didn't even know why did you flash it for Cricket... An unlocked firmware works the same with them.
SoNic67 said:
Just flash back to U1, it is more desirable.
Actually I didn't even know why did you flash it for Cricket... An unlocked firmware works the same with them.
Click to expand...
Click to collapse
Because it allowed me to have wifi calling with some trickery. I have basically no service in my house.
WiFi calling is not supported by Cricket... officially.
If you didn't have signal, why kept the service? Total Wireless for example uses Verizon, their reach usually is greater.
Anyway, resale value is greater with original U1 firmware.
To do what you are hoping for.... Download The newest G973U USC firmware and flash that if you're selling it in the USA.... That way it switches apps and carrier bloat when a sim is changed... Otherwise flash G973U1
XAA firmware if your selling anywhere else.
If it was a g973u1, it might not work on verizon/sprint.... If it was a g973u, it should work on both no problem. Even an AT&T S10 can be activated on Sprint or Verizon as long as the IMEI is clean and clear.
With other S series devices there was a U and U1 model and only the U model supported AT&T WiFi calling.
Do we know yet if the same will be true of the S20 FE?
(As explained in other threads, with other S series devices it was the same hardware just different firmware and you can flash the phone to switch from one to the other)
I have the unlocked model from Best Buy and I'm on At&t. I don't see any option for wifi calling.
The Wi-Fi Calling app is installed on the phone, you can see the app in the list of system apps. I tried accessing it using Nova Activities & making a widget shortcut on the home screen but when I click on the icon it says permission denied. So it's there but Samsung / AT&T aren't letting us use it. I found this document, (I can't post the link since i'm a new user) google "service capabilities unlocked device att", which shows that previous unlocked Samsung Variants did not have Wi-fi calling on AT&T. Maybe there is a way to bypass the permission denied or access it? It's a deal breaker for me and I'll be returning the phone if it doesn't support Wi-Fi calling. I just signed up for a year of AT&T prepaid.
I was able to convert my Unlocked Model Firmware to the AT&T Firmware and now Wi-Fi Calling is enabled. It came with some other AT&T apps (Bloatware) but I don't mind since Wi-Fi Calling is a major plus for me. It's essentially an AT&T Branded Phone now except it has all the bands that the Unlocked version has.
Would you please care to elaborate how you did it? I’ve tried the typical Odin process with no success
cabegol said:
Would you please care to elaborate how you did it? I’ve tried the typical Odin process with no success
Click to expand...
Click to collapse
Sure, First make sure you have the Samsung USB Drivers installed. You can find it on the support page of the S20 FE. I Downloaded Frija 1.4.2 in order to get the latest Firmware. Model "SM-G781U", CSC "TMB" for the U.S Version. As I understand the Carrier versions are all the same and will load up the correct one based on the sim card you have in your device. I downloaded Odin 3.14.4. Unzipped and placed the correct files into Odin, I did the non Home CSC file and left USERDATA blank because Samsung switches the version based on your sim card. Put your phone in Download mode. I got an error the first time but switched to a different USB and it flashed it to the AT&T version.
Thank you!
---------- Post added at 09:23 AM ---------- Previous post was at 08:34 AM ----------
I've done this process numerous times (with success) but with this S20 FE from TMO the XAA firmware does not prompt me to reboot on SIM change (carrier change). I've found that this process works flawlessly to change the CSC:
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 dial, you should see a screen with the list of available CSC codes for your device. Select the CSC that you want and tap the Install option.
In my case, this won't wipe the data on the phone, your experience may vary.
Another note: if you're using the "U" firmware, a CSC change will prompt the installation of carrier bloatware upon reboot. If the "U1" version of the firmware is used, the carrier changes but without the added bloatware.
Donatelloj said:
I was able to convert my Unlocked Model Firmware to the AT&T Firmware and now Wi-Fi Calling is enabled. It came with some other AT&T apps (Bloatware) but I don't mind since Wi-Fi Calling is a major plus for me. It's essentially an AT&T Branded Phone now except it has all the bands that the Unlocked version has.
Click to expand...
Click to collapse
where did you download the roms from is it the same model as the regular s20 unlocked ones or ?
Can someone confirm the *#272*IMEInumber# does, indeed, work on the unlocked S20 FE sold in US? What CSCs are available? Can you really switch between them without losing data? Do any of the available CSCs have eSIM enabled? What about native call recording? Which ones?
badazzbubbanc said:
where did you download the roms from is it the same model as the regular s20 unlocked ones or ?
Click to expand...
Click to collapse
No, use Frija 1.4.2. It has the lastest Firmware for the S20 FE.
I'm using an AT&T MVNO and I am able to get wifi calling. I popped my sim in during the setup process and it rebooted a few times. No bloatware or anything. I think as long as it's the first sim in the phone, it should do the trick.
Donatelloj said:
No, use Frija 1.4.2. It has the lastest Firmware for the S20 FE.
Click to expand...
Click to collapse
You know what I needed to type to get unlocked U.S XAA? Been searching and no luck.
Sent from my SM-G781U using Tapatalk
I have the SM-G781U1. Tried the *#272*IMEInumber# trick but after I change the CSC to XAA, the phone reboots twice and goes back to previous CSC (ATT) with no Wi-Fi calling. Also, cannot find any firmware for this model on Frija. What is the difference with the SM-G781U?
raptor1983 said:
I have the SM-G781U1. Tried the *#272*IMEInumber# trick but after I change the CSC to XAA, the phone reboots twice and goes back to previous CSC (ATT) with no Wi-Fi calling. Also, cannot find any firmware for this model on Frija. What is the difference with the SM-G781U?
Click to expand...
Click to collapse
What you trying to flash At&t firmware?
Sent from my SM-G781U1 using Tapatalk
x1tymez said:
What you trying to flash At&t firmware?
Sent from my SM-G781U1 using Tapatalk
Click to expand...
Click to collapse
Yes, I need wifi calling.
raptor1983 said:
Yes, I need wifi calling.
Click to expand...
Click to collapse
Last I checked there's none at&t firmware. You should wait for now. Terrible, At&t still don't play nice with unlocked phone.
Sent from my SM-G781U1 using Tapatalk
x1tymez said:
Last I checked there's none at&t firmware. You should wait for now. Terrible, At&t still don't play nice with unlocked phone.
Sent from my SM-G781U1 using Tapatalk
Click to expand...
Click to collapse
I'll wait. Thank you.
Donatelloj said:
I was able to convert my Unlocked Model Firmware to the AT&T Firmware and now Wi-Fi Calling is enabled. It came with some other AT&T apps (Bloatware) but I don't mind since Wi-Fi Calling is a major plus for me. It's essentially an AT&T Branded Phone now except it has all the bands that the Unlocked version has.
Click to expand...
Click to collapse
So you were able to convert firmware on G781U1 to AT&T G781U for Wifi Calling? In regards to bands, if you switched firmware from AT&T to unlocked, shouldn't it also enable all the unlocked model bands?
Zac2 said:
So you were able to convert firmware on G781U1 to AT&T G781U for Wifi Calling? In regards to bands, if you switched firmware from AT&T to unlocked, shouldn't it also enable all the unlocked model bands?
Click to expand...
Click to collapse
I confirm what posted by Donatelloj. Starting from SM-G781U1, I installed firmware for SM-G781U (CSC TMB) with no USERDATA and Wi-Fi calling is working now! I had an issue with the fingerprint sensor not working but after 2 reboots everything looks fine. Now having troubles syncing Gallery with OneDrive but I believe this is a different story.
I've just installed unbranded Android 11 (G781U1UES1CUA2) on US unlocked SM-G781U1 and ATT Wi-Fi calling is working. No need for branded firmware anymore.
I bought an unclocked S20 FE and flashed with ATT FW hoping I'd get the ATT (bloatware) allowing me to tether and get Visual Voice Mail. I do not see any of the ATT Bloat ware when I flashed SM-G781U1_ATT_G781U1UEU5DUH1 from Samfw.com. Mine is SG-781U1 (unlocked).
Any pointers would be very much appreciated. Able to get ATT SIM (5g) to work with Wifi calling and Volte but no Hotspot. When I toggle this it reverts back saying my plan does not allow it. I verified that my plan allows it and works on iPhone.
Thanks
Thats because you flashed U1 unlocked firmware that is not carrier branded. You need to flash U firmware and it will provision to your At&t sim.
butchieboy said:
Thats because you flashed U1 unlocked firmware that is not carrier branded. You need to flash U firmware and it will provision to your At&t sim.
Click to expand...
Click to collapse
Can you suggest which one in the U Firmware I should use. I tried TMB and USC and no dice. I am not able to get rid of the CSC - shows as ATT/ATT/XAA - unable to get Hotspot working. I dont get any bloat ware the ATT stuff. I dont mind it but trying to flash the "U" version did not help. Appreciate any pointers
If your device is the unlocked version it will show XAA. It doesn't matter which U firmware you flash, they are all the same. The firmware will provision to whatever sim you have in device