Question AT&T SIM in a Verizon S908U. CSC not changing. - Samsung Galaxy S22 Ultra

I've been on Verizon for about 10 months now, but would like go switch to AT&T. I put an AT&T Prepaid SIM into the Verizon S22, and was expecting it to restart with the AT&T CSC firmware, but it stayed with the Verizon software. I even got a message saying that because it wasn't a Verizon SIM that some services would be unavailable.
What's going on? I thought all the US S22 Ultras were the same phone whether it's bought from AT&T or Verizon or any other carrier.

Are you using an esim with Verizon? If so try turning it off and letting att be the only one active and it should reboot. You will still keep all the Verizon apps and logo

Nope, I'm using a physical Verizon SIM. Isn't stuff like the boot animation and 5G icons supposed to change, since it's a different carrier?

sjvirchow said:
Nope, I'm using a physical Verizon SIM. Isn't stuff like the boot animation and 5G icons supposed to change, since it's a different carrier?
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Can happen if the firmware you're on doesn't support "BYOD" yet. This is true of earlier releases of phones on U firmware. U1 supports it out of the box, so you might want to consider flashing U1.

Right but this is a Verizon S22 Ultra. It isn't really early I would think. Aren't all the S22's in the US the exact same phone?

sjvirchow said:
Right but this is a Verizon S22 Ultra. It isn't really early I would think. Aren't all the S22's in the US the exact same phone?
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Same hardware but like I said U firmware is hit and miss.

I switched from Verizon to T-Mobile. After 2 weeks I was still running Big Red branding. One day I started having issues with cell service and data. I flashed the latest U1 software and have been problem free ever since.

Related

Unlocked Version vs Carrier Specific

I was looking to buy the Galaxy Note 8, and is it worth buying the Unlocked version over the ATT version? I know I will save a little money, and also have less bloatware. I could not find much info on the basebands of these phones, there would not really be any basebands the unlocked version wouldnt have that the ATT version has? I assume that it would just be smarter to get the unlocked version?
Someone correct me if I am wrong
Sorry this is somewhat unrelated to the S8+
Thanks
Somebody mentioned the carrier specific ones may get updates more frequently. Regardless, the only unlock that really matters to me is bootloader unlock. US Snapdragon S8/S8+ are not bootloader unlocked--regardless whether the model is carrier unlocked or not. Only the Chinese and Hong Kong Snapdragon S8/S8+ bootloaders can be unlocked so far. My recommendation is to pre-order the Note 8 as you were interested in that phone, but that if you were planning on sticking with the same carrier and wanted updates more frequently, getting a carrier specific Note 8 might be best.
I'm in the same situation. I currently with att prepaid, they have LTE+ (LTE advanced). I did speed test twice, getting 127mb down, 30mb up, 115mb down, 28mb up. I'm not sure if unlocked version note8 has all the LTE bands. I thinking of just getting att version and if I want to switch carrier in the future, I just pay for those unlock service.
netnerd said:
I thinking of just getting att version and if I want to switch carrier in the future, I just pay for those unlock service.
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Be careful about those assumptions, make sure the AT&T variant has all the bands needed for full rate.
Recently switched from ATT to Verizon, and ended up getting a new phone (not *really* complaining since it's the GS8+) because my 1 yr old GS7edge AT&T model didn't have support for the correct LTE bands to work properly with the Verizon network.
I'm planning on staying with the same carrier, I just figure I'd get update faster, have less bloat ware, and have more lte bands (with the unlocked version)
Isn't that all accurate?
ALL the US versions have the same exact hardware and support the same exact bands. The ONLY difference is the carrier specific firmware. And you can change that by flashing whichever firmware you want through ODIN.
brendan4t said:
I was looking to buy the Galaxy Note 8, and is it worth buying the Unlocked version over the ATT version? I know I will save a little money, and also have less bloatware. I could not find much info on the basebands of these phones, there would not really be any basebands the unlocked version wouldnt have that the ATT version has? I assume that it would just be smarter to get the unlocked version?
Someone correct me if I am wrong
Sorry this is somewhat unrelated to the S8+
Thanks
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Click to collapse
I have both S8 T-mobile and S8 unlocked. They have identical LTE bands. Moreover, when inserting SIM cards from different providers the CSC is changed to that provider and some specific options are enabled. I put in T-mobile SIM card and used it without any issues. Put in Vodaphone Europe SIM card and CSC changed from TMB to XAA (unlocked) and phone still had all LTE bands available and worked. I'm sure it's the same for ATT. Also, from previous experience if you get ATT version and change providers you'll not get updates anymore unless you go to Samsung to have your phone updated, as all OTA's go through ATT servers.
Go for unlocked.

Unlocked S8+ on AT&T?

Hello all,
A friend of mine is on AT&T and thinking of getting an US unlocked S8+ to use. He asked me what he might miss out on by not getting the AT&T version. I'm thinking VOLTE, maybe wifi calling. Idk. Can anyone enlighten us?
Thanks.
-evilhunter101
P.S. I swear this is really for a friend, I'm using a Verizon S8+ on Verizon :good:
I had bought an AT&T version of the S8 plus and unlocked it, then i switched the fw to the unlocked version and now i am able to use it on any carrier i want. The only problem is that i have to activate my service on one of my older phone that used the carrier i wanted.
Honestly, won't be missing out on much
alspaugh.william said:
I had bought an AT&T version of the S8 plus and unlocked it, then i switched the fw to the unlocked version and now i am able to use it on any carrier i want. The only problem is that i have to activate my service on one of my older phone that used the carrier i wanted.
Honestly, won't be missing out on much
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So basically nothing missing. That's good to hear. He's already on AT&T but I don't know the sim card size of his current phone. We'll deal with that when we get there.
Thanks, appreciate the information.
I think you're right about WiFi calling unless there is some other way to add it. I'm looking for a solution for that. I just switched my AT&T S8+ to an unlocked ROM and that is the thing I miss the most. Not sure about volte.

Can a GSM SM-N975U work on verizon?

If it's unlocked from T-mobile, can I use it on verizon? If not directly, then is there a safe, verified way to flash the verizon firmware which will make it 100% identical to the verizon version with everything working and future OTAs etc?
Considering getting a used one for a good deal, but I use verizon.
Thanks!
Yes, all the N975U models are the same. You can flash the Verizon firmware if you want, it will turn it into the retail Verizon version of the phone.
finshan said:
If it's unlocked from T-mobile, can I use it on verizon? If not directly, then is there a safe, verified way to flash the verizon firmware which will make it 100% identical to the verizon version with everything working and future OTAs etc?
Considering getting a used one for a good deal, but I use verizon.
Thanks!
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Click to collapse
there is no such thing as a GSM Note or S series phone that ends in a U or U1. They are all literally the same as stated in the response before mine. Ever since the S8, all galaxy phones built for the USA market are all the same. Thankfully. That GSM or CDMA version thing they had going on for a while was irritating LOLOL

Seriously what is the advantage of T-mobile vs Unlocked?

I have an S20U now that is unlocked. What I love is that I get the updates faster it seems (although, the S20 has had way more updates than normal). I am thinking of getting the branded Tmobile one, I have never had any issues using their software and it seems to work better on the network. I do not honestly care about "bloatware" as I will at least be getting a 256GB model.
Anyone have any experiences either way?
I don't have any experience with TMO specifically, but what I do know is that typically the carrier branded devices get their updates WAY fast and more often than the Unlocked ones. I'm in the same boat, I don't really care much one way or another about the bloat. If I don't like it I uninstall it if I can or at the very least disable it
kangi26 said:
I don't have any experience with TMO specifically, but what I do know is that typically the carrier branded devices get their updates WAY fast and more often than the Unlocked ones. I'm in the same boat, I don't really care much one way or another about the bloat. If I don't like it I uninstall it if I can or at the very least disable it
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It is my understanding that the unlocked one can be used in any country and any network. Just switch sim card and you are done. The TMobile one, may be locked until you pay off the device. You also don't get the bloatware with unlocked (one less thing to Uninstall if you don't care for it).
Sent from my SM-N976U 5G using XDA-Developers Legacy app
Eudeferrer said:
It is my understanding that the unlocked one can be used in any country and any network. Just switch sim card and you are done. The TMobile one, may be locked until you pay off the device. You also don't get the bloatware with unlocked (one less thing to Uninstall if you don't care for it).
Sent from my SM-N976U 5G using XDA-Developers Legacy app
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There are 2 "Kinds" of Unlocked, you're referring to SIM unlocked, the other is the U1 devices sold by Samsung. Which I suspect what the OP is referring to
kangi26 said:
typically the carrier branded devices get their updates WAY fast and more often than the Unlocked onest
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Click to collapse
That used to be true, but not for the last couple of years. The unlocked US Note10+ (N975U1), for example, has gone through 18 software releases in the 12 months it's been out. Many of its updates came out within the first few days of the month, and included that month's Android security patch.
T-Mobile has been lagging for the past few months in its updates for both the N975U and the N975U1, but you can manually download and flash the latest unlocked software immediately.
Also, it is my understanding that Tmobile tweaks it's cellular radio's to perform slightly better than the unlocked version of any phone used on it's network.
From my experience, AT&T, the branded phones have the extras like wifi calling and VoLTE enabled and the unlocked ones don't. Some of the video call features are missing. I wouldn't have a problem with the bloatware but AT&T seems to force it back on and there is no way to remove it without root (which i don't do anymore). This has been my experience from Note 5 , 2 of the 7's ,note 8 and the note 9 I currently use, all have been unlocked.
Sent from my Samsung SM-N960U1 using XDA Labs
Unlock has free caller ID builtin, Tmobile you have to pay for it. Unlock has no Tmobile branding or bloatware. Unlock version is easier to bypass tmobile hotspot apn, and usage limits
T-Mobile version has video calling on the phone app, unlock use to, but not anymore. There might be a few more things but I can't remember right now.
Sent from my SM-N975U1 using Tapatalk
I'm on sprint/tmo but I got the unlocked for the first time because I paid outright for the phone this time
*Omnipresent* said:
Also, it is my understanding that Tmobile tweaks [its] cellular [radios] to perform slightly better than the unlocked version of any phone used on [its] network.
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Are you referring to the APN settings, or to something else?
https://www.t-mobile.com/support/devices/not-sold-by-t-mobile/byod-t-mobile-data-and-apn-settings
*Omnipresent* said:
Also, it is my understanding that Tmobile tweaks it's cellular radio's to perform slightly better than the unlocked version of any phone used on it's network.
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Click to collapse
This simply isn't true with the Samsung phones. I have had both and there definitely is no difference in connectivity in either data or calls between unlocked and carrier version.
Sent from my SM-G986U1 using Tapatalk
agree - that was a bunch of talk on this forum last year when the note 10+ was shipping . lots of cats on here were trying to say this and it was just not true. i had 3 unlocked phones on tmo and service was consistent.
Gary02468 said:
Are you referring to the APN settings, or to something else?
https://www.t-mobile.com/support/devices/not-sold-by-t-mobile/byod-t-mobile-data-and-apn-settings
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Click to collapse
I think he's referring to carrier aggregation. I don't know if it's a thing licked phones have that unlocked don't. I always go unlocked (so the phone feels like it's mine, lol) and can't say I've noticed a difference.
d_ganggreen said:
I have an S20U now that is unlocked. What I love is that I get the updates faster it seems (although, the S20 has had way more updates than normal). I am thinking of getting the branded Tmobile one, I have never had any issues using their software and it seems to work better on the network. I do not honestly care about "bloatware" as I will at least be getting a 256GB model.
Anyone have any experiences either way?
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Click to collapse
Thank you for your post. Does the Wifi Calling on Tmobile work on the Unlocked phone? I am looking at buying the unlocked 512gb model but have to have wifi calling when I am traveling internationally.
Does anyone know if the stock firmware can be flashed on any device if it's factory unlocked? I think the answer is yes, but just want to make sure before I purchase one used. I know your can flash the carrier firmware so I assume you can do the reverse.
ccommcomm said:
Thank you for your post. Does the Wifi Calling on Tmobile work on the Unlocked phone? I am looking at buying the unlocked 512gb model but have to have wifi calling when I am traveling internationally.
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Click to collapse
Yes. and if you follow a few of the guides here you can "unlock" video calling and RCS in Samsung messages as well. And if you are really creative, there is another guide to expanding bands and tweaking receiving antennas
And the last question, if you buy the U1 unlocked, you can flash carrier firmware or unlocked firmware either way all you want, but keep in mind going from u to u1 firmware requires a wipe.
The old "unlocked" was slower to get updates is only true if you wait for Tmobile to release it. If you use Frija and Odin, you can pretty much get it the same day Samsung releases it. I'm too impatient to wait for Tmobile to "get around to" reviewing it and re-releasing what Samsung released weeks before.
Most of the "negatives" of having unlocked are long gone at this point and it tilts more into the positives.
Compusmurf said:
Yes. and if you follow a few of the guides here you can "unlock" video calling and RCS in Samsung messages as well. And if you are really creative, there is another guide to expanding bands and tweaking receiving antennas
And the last question, if you buy the U1 unlocked, you can flash carrier firmware or unlocked firmware either way all you want, but keep in mind going from u to u1 firmware requires a wipe.
The old "unlocked" was slower to get updates is only true if you wait for Tmobile to release it. If you use Frija and Odin, you can pretty much get it the same day Samsung releases it. I'm too impatient to wait for Tmobile to "get around to" reviewing it and re-releasing what Samsung released weeks before.
Most of the "negatives" of having unlocked are long gone at this point and it tilts more into the positives.
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Click to collapse
U and U1 have the same radios in them, they are made specifically for the USA market. Depending on what carrier sim card you insert those bands for said USA carrier will be made available for the user. No need to expand bands. The technical specifications of the U1 and U models are listed on samsung USA website for cross referencing.
Anyone successfully using call recording feature on either version? Still looking for my U.S t-mobile variant..
T-Mo non-unlocked Samsung phones (maybe just the Note 20 Ultra though since I haven't been with Samsung since the Note 3 lol) have a bunch of issues. They're about one month behind on updates when compared to all of the other companies. Additionally, I saw someone mention that they have better mobile data quality. That is also true... I found that out once I manually switched to the Android 11 beta as my 5G speeds went from a constant 130mb/s down to 0.5 - 2mb/s without the firmware being specifically from T-Mo. In my settings, all of the mobile connection stuff is exactly the same as it was before...
Also, I don't have voicemail support. Yet another T-Mo problem (but you can easily add Samsung as a possible cause of that problem too)... Had to switch back to the Google Phone app just so that I could get old-school style voicemail (where you have to call your own phone number to get in).
---------- Post added at 11:29 AM ---------- Previous post was at 11:25 AM ----------
dj24 said:
Anyone successfully using call recording feature on either version? Still looking for my U.S t-mobile variant..
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This hasn't worked for me either. It's starting to seem like Samsung pushed some of their development onto the phone carriers now lol.
Hey Samsung, why not just leave Android alone when you get it from Google so you don't have to cause so many problems with your own, customized (ad filled, feature removing) version moving forward? Heck, I've already had some problems with a bunch of your apps and have gotten zero help or answers from you guys. That's the reason I've switched back to a bunch of Google apps, however, half of those didn't even work on this phone!!! But I messaged Google about these problems as well, and you know what? They fixed ALL OF THEM within two weeks.
I'll definitely be buying from a different manufacturer moving forward. Even more so since there's rumours spreading around online right now that the Note 20 was the last Note phone to be released since the upcoming S21 is going to have stylus support...
The difference between unlocked and t-mobile is that unlocked gets its updates directly from Samsung and is not branded.
While t-mobile version is branded and you receive the updates from t-mobile and not from Samsung. So delay or longer waiting time on updates would happen and maybe even won't get few of the updates.
Since t-mobile has to release them, which take longer time.
Skickat från min SM-N986B via Tapatalk

Need to switch stock AT&T f/w over to T-Mobile

I was part of my sisters AT&T family plan and I had recently traded my S8+ in for the AT&T version of the Galaxy Note 20 Ultra SM-N986U. Well sis got fed up with AT&T pricing and wanted to switch. So I was forced into paying off my phone & the 4 of us switched to T-Mobile . Me & my wife have our own plan and no longer part of my sisters. So after unlocking the phone the port went fine but I want to switch my f/w to T-mobiles. Will there be any problem in doing so?
SuddenImpact58 said:
I was part of my sisters AT&T family plan and I had recently traded my S8+ in for the AT&T version of the Galaxy Note 20 Ultra SM-N986U. Well sis got fed up with AT&T pricing and wanted to switch. So I was forced into paying off my phone & the 4 of us switched to T-Mobile . Me & my wife have our own plan and no longer part of my sisters. So after unlocking the phone the port went fine but I want to switch my f/w to T-mobiles. Will there be any problem in doing so?
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Click to collapse
If the phone is unlocked, you should be fine. Both use the same base firmware.
You may or may not get all the T-Mobile features. There is a fix for that if you don't get all the T-Mobile features, but it typically involves wiping/resetting your phone.
rjohnstone said:
If the phone is unlocked, you should be fine. Both use the same base firmware.
You may or may not get all the T-Mobile features. There is a fix for that if you don't get all the T-Mobile features, but it typically involves wiping/resetting your phone.
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Click to collapse
No doubt that is what I need to do. I just tried SamMoble stock USA T Mobile f/w with Android 11 using Odin & the phone still see's that it is a AT&T purchased phone at boot.
SuddenImpact58 said:
No doubt that is what I need to do. I just tried SamMoble stock USA T Mobile f/w with Android 11 using Odin & the phone still see's that it is a AT&T purchased phone at boot.
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Click to collapse
Did you have the T-Mobile SIM card in it?
If not, it will revert to it's initial build CSC. AT&T in this case.
The other option is to manually change your CSC from ATT to TMB. There are threads here on how to do it.
rjohnstone said:
Did you have the T-Mobile SIM card in it?
If not, it will revert to it's initial build CSC. AT&T in this case.
The other option is to manually change your CSC from ATT to TMB. There are threads here on how to do it.
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Click to collapse
I guess since its a USA based Snapdragon I cant even root it. Yes I did have the T-Mobile SIM card in it. I have tried 2x with stock T-Mobile fw & it still thinks its AT&T. The working network does show T-Mobile, but I would like to get the AT&T f/w off of it. So I will research how to manually change your CSC.

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