Okay so I was on Verizon with my unlocked note 8 and I would use unlocked stock firmware and got volte it was great. I switched to att and did the same went through ims says csc not found. Fine I flashed the att unlocked and it gives me a att bootup and att apps but I get volte. What files would I need to have unlocked firmware and volte. On AT&T. Thank you all I have all the Odin files download
can someone please tell me the definition of tmb xaa spr in the service provider sw version please..i have a unlocked note 8 sm-n950U tmobile brand brought from samsung with metropcs service.im currently not able to use VolTE or wifi calling and other featured, I don't know why?how can I fix or flash to correct this.
Any opinions or suggestions are appreciated thank you
TMB is your active CSC. XAA would be the recommended CSC of your SIM card. SPR is the original CSC of the phone. Although it doesn't really matter, that means your phone was originally a Sprint phone which doesn't make sense according to how you stated you purchased it.
Only the first 2 are important. Metro PCS uses T-Mobile's network so TMB CSC is makes sense. You don't have VoLTE because you are running the unlocked firmware. Many people think it's better to run the unlocked firmware because of less bloat. However when you don't run the carrier's firmware, you may loose certain carrier features, like in your case VoLTE. IMO it's better to run the carrier's firmware & debloat it, unless you are rooted.
Unfortunaty with Oreo there's no way to enable VoLTE without root. Flashing your carrier's firmware should enable it. I'm not sure if Metro PCS has their own firmware, if they don't, flash T-Mobile's firmware.
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
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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.
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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 ?
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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.
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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?
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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
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Yes, I need wifi calling.
raptor1983 said:
Yes, I need wifi calling.
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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
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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.
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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?
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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.