Develop Bugs

Unlocked, Dual-SIM Note 10+ - No Data on AT&T SIM

So - this is my 1st Dual-SIM phone, and I'm very happy to get away from having to carry 2 different phones (personal on T-Mobile; work on AT&T - in the USA). I thought that everything had been working correctly - until I was away from my Wi-Fi signal. If I have SIM1 selected for data (T-Mobile), everything is fine. If I select SIM2 - I get nothing. It always shows 3G for AT&T even though I'm in a very strong 4G area for AT&T.
I've been through the Access Point Names settings for AT&T and they matched what I found on AT&T's web site. I even duplicated them with a new name to make sure that they were correct - still nothing. I've played around with which slot the SIM card was in as well as only installing one at a time (just AT&T in SIM1, just AT&T in SIM2, etc.) rebooting the phone each time - still no luck.
Hoping for an assist or "things to try" from the community as I don't expect much help from AT&T on an unlocked phones. Any help is very much appreciated!
Thanks!

tmatlack said:
Hoping for an assist or "things to try" from the community as I don't expect much help from AT&T on an unlocked phones. Any help is very much appreciated!
Thanks!
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Welcome to the DS family. Does SIM card manager show 4G/3G/2G enabled for both SIM's? On my older Note 8 4G wasn't supported simultaneously so you had to manually switch the 2nd SIM to 4G but on my Note 10+ this limitation doesn't exist but still worth checking.

sansnil said:
Welcome to the DS family. Does SIM card manager show 4G/3G/2G enabled for both SIM's? On my older Note 8 4G wasn't supported simultaneously so you had to manually switch the 2nd SIM to 4G but on my Note 10+ this limitation doesn't exist but still worth checking.
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4G/3G/2G is selected for both SIM's, but still only shows 3G for the AT&T SIM.

tmatlack said:
4G/3G/2G is selected for both SIM's, but still only shows 3G for the AT&T SIM.
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That would've been too easy. Do you observe the same behavior if you swap the SIM card positions? Also what if you put in just the AT&T SIM by itself (i.e. does it ever get 4G in either slot)?

sansnil said:
That would've been too easy. Do you observe the same behavior if you swap the SIM card positions? Also what if you put in just the AT&T SIM by itself (i.e. does it ever get 4G in either slot)?
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I've tried both slots with just the AT&T SIM - never get data and never anything but 3G. Strange thing is calls and texts go through...

Hmm, that sounds like it's missing an LTE band it needs to get 4G with AT&T. I don't have an AT&T SIM hand to test with but for the non-US Samsung phones don't have full support for the frequency bands US carriers use (I'm assuming you have an intl phone so correct if wrong.).

I have the dual SIM and get LTE on ATT. I reckon you need to contact ATT and tell them you are using a note 10+ and need LTE enabled.

ekerbuddyeker said:
I have the dual SIM and get LTE on ATT. I reckon you need to contact ATT and tell them you are using a note 10+ and need LTE enabled.
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Spent 2 hours on the phone with them last night. They had me set up the Access Point names over & over - no luck. They suggested I buy an AT&T branded phone. Big help...

I once came from another device to another device and had the wrong kind of sim for 4G/LTE. Or maybe the sim is damaged, or it's just registered wrong.
So: try Hard reset the device AND get a replacement sim card from ATT (can get them at the store and don't let them sucker you into paying for it). Perhaps that will do it.

Came across the post below - I do have an old AT&T SIM card (6 or 7 years?). Looks like an Android 9 update at some point caused issues with older AT&T SIM cards. I'm heading out to get a new SIM from AT&T tonight... Thanks for the attempts at helping - I'll update tonight and let you know how it goes. May be in for a fight - it's a corporate phone and I'm not authorized on the account...
https://forums.att.com/t5/Apple/Cellular-data-not-working/td-p/5731162

What's the update?
I'm in same boat well I have att work phone and T-Mobile personal. Am thinking of jumping to the international note 10 plus phone for dual SIM

joogle said:
What's the update?
I'm in same boat well I have att work phone and T-Mobile personal. Am thinking of jumping to the international note 10 plus phone for dual SIM
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So - I was able to get it working. I had been using the same SIM card for 6+ years. However, getting a new one didn't fix the issue.
They said that the IMEI number wasn't coming up as a valid number. I had a One Plus 7 Pro laying around, so I had them register the new SIM card to that phone, and it magically started working (the old Sim didn't work in it, either). After getting that working, I just moved the SIM to the Note 10+, and haven't had any issues, since.

tmatlack said:
Came across the post below - I do have an old AT&T SIM card (6 or 7 years?). Looks like an Android 9 update at some point caused issues with older AT&T SIM cards. I'm heading out to get a new SIM from AT&T tonight... Thanks for the attempts at helping - I'll update tonight and let you know how it goes. May be in for a fight - it's a corporate phone and I'm not authorized on the account...
https://forums.att.com/t5/Apple/Cellular-data-not-working/td-p/5731162
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tmatlack said:
So - I was able to get it working. I had been using the same SIM card for 6+ years. However, getting a new one didn't fix the issue.
They said that the IMEI number wasn't coming up as a valid number. I had a One Plus 7 Pro laying around, so I had them register the new SIM card to that phone, and it magically started working (the old Sim didn't work in it, either). After getting that working, I just moved the SIM to the Note 10+, and haven't had any issues, since.
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Do the Samsung pay and rewards app work?

joogle said:
Do the Samsung pay and rewards app work?
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I don't use Samsung Pay, but it was there lurking on the side (I disabled it). I use the Samsung Shop app for rewards - it works just fine.

tmatlack said:
I don't use Samsung Pay, but it was there lurking on the side (I disabled it). I use the Samsung Shop app for rewards - it works just fine.
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Click to collapse
Thanks what was the exact model number of your phone?
I guess it's time for me to sell my TMobile one and get the international one. I use the Samsung Pay / Cashback and Shop Samsung app from their set

joogle said:
Thanks what was the exact model number of your phone?
I guess it's time for me to sell my TMobile one and get the international one. I use the Samsung Pay / Cashback and Shop Samsung app from their set
Click to expand...
Click to collapse
SM-N9750/DS is the model I bought.

tmatlack said:
I don't use Samsung Pay, but it was there lurking on the side (I disabled it). I use the Samsung Shop app for rewards - it works just fine.
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Click to collapse
tmatlack said:
SM-N9750/DS is the model I bought.
Click to expand...
Click to collapse
Did you notice any signal degradation on T-Mobile with maybe lack of bands?
Lastly where did you buy yours from? If it was eBay what was the seller name?
Thanks

Looking To Buy This Phone...Need Advice...

I am looking to get this phone and needed some advice. I haven't bought a cellular branded phone for a long while. I usually go with the USA Factory unlocked version. On this phone is the cellular named stamped on the back of the phone? I know the model for the USA Unlocked version is G820QM (with a 7 at the end at times) but it is honestly harder to find. What does everyone recommend on this phone in regards to getting the cellular branded one or should I keep trying to find the USA Unlocked version? What about bloatware with the different cellular branded ones? How is that? Can you get rid of the bloatware? I also like what I call the LG Branded ones as they get the updates faster do they not? Please help me. I am looking for a phone and this one stuck out at me unless someone suggests a different phone with similar specs to this one? Thanks so much! :good:

alias4ever said:
I am looking to get this phone and needed some advice. I haven't bought a cellular branded phone for a long while. I usually go with the USA Factory unlocked version. On this phone is the cellular named stamped on the back of the phone? I know the model for the USA Unlocked version is G820QM (with a 7 at the end at times) but it is honestly harder to find. What does everyone recommend on this phone in regards to getting the cellular branded one or should I keep trying to find the USA Unlocked version? What about bloatware with the different cellular branded ones? How is that? Can you get rid of the bloatware? I also like what I call the LG Branded ones as they get the updates faster do they not? Please help me. I am looking for a phone and this one stuck out at me unless someone suggests a different phone with similar specs to this one? Thanks so much! :good:
Click to expand...
Click to collapse
Unsure where you're from, but stay away from the AT&T unlocked model (my model G820UM), I'm from the UK and ordered one, big mistake, AT&T does not send any update to their phones if they are not using an AT&T SIM card in the US, some users have been successful in updating they're OS, by just using a AT&T SIM card outside of the US, some haven't and I haven't tried it, because I don't want to waste more money on a SIM card when the results are not 100% guaranteed.
There is no way of cross flashing a different ROM, so you will be stuck without updates, until someone finds a way of cross flashing a ROM from an unlocked model. I'm checking this forum regularly hoping some has found a solution, but nothing so far
If you are in the US and on AT&T then it will fine, bloatware (which is a lot) can be removed/disabled easily
Honestly, for the price I paid (£280), I think the Xiaomi Mi9 would have been a better option, similar specs, updates every 2 months and you're able to unlock bootloader, not the best process to unlock the bootloader, but still possible (just need to wait for permission from Xiaomi which could take a few weeks), you'll be missing out on the best headphone jack, better cameras (not by much) and better battery life, for a similar price I think this is the best deal for snapdragon 855 phone.
If you don't mind paying a bit more and want the same features as the G8, go for the Samsung S10.

hugoprh said:
Unsure where you're from, but stay away from the AT&T unlocked model (my model G820UM), I'm from the UK and ordered one, big mistake, AT&T does not send any update to their phones if they are not using an AT&T SIM card in the US, some users have been successful in updating they're OS, by just using a AT&T SIM card outside of the US, some haven't and I haven't tried it, because I don't want to waste more money on a SIM card when the results are not 100% guaranteed.
.
Click to expand...
Click to collapse
Have you tried updating after taking out the SIM card?

ChrisAG said:
Have you tried updating after taking out the SIM card?
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Yep no luck, I've sold the phone, I was wasting too much time trying to find a solution, so just sold it and claimed my sanity back xD
Going back to the trusty Xperia 5, timely updates and great software and they are going for around £260 so easily recommended.

That's too bad, AT&T must be interfering, because I just purchased an unlocked G8 in Canada, and it updated to 10 over WiFi, before I inserted a SIM from my carrier (Bell Mobility). Phone was not on Bell originally.

ChrisAG said:
That's too bad, AT&T must be interfering, because I just purchased an unlocked G8 in Canada, and it updated to 10 over WiFi, before I inserted a SIM from my carrier (Bell Mobility). Phone was not on Bell originally.
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Click to collapse
Yep, this a AT&T "feature", want updates? Buy at AT&T SIM card and use it in the US, guess they don't want anyone outside the US to use their products, unsure why, but it is what it is...

hugoprh said:
Unsure where you're from, but stay away from the AT&T unlocked model (my model G820UM), I'm from the UK and ordered one, big mistake, AT&T does not send any update to their phones if they are not using an AT&T SIM card in the US, some users have been successful in updating they're OS, by just using a AT&T SIM card outside of the US, some haven't and I haven't tried it, because I don't want to waste more money on a SIM card when the results are not 100% guaranteed.
There is no way of cross flashing a different ROM, so you will be stuck without updates, until someone finds a way of cross flashing a ROM from an unlocked model. I'm checking this forum regularly hoping some has found a solution, but nothing so far
If you are in the US and on AT&T then it will fine, bloatware (which is a lot) can be removed/disabled easily
Honestly, for the price I paid (£280), I think the Xiaomi Mi9 would have been a better option, similar specs, updates every 2 months and you're able to unlock bootloader, not the best process to unlock the bootloader, but still possible (just need to wait for permission from Xiaomi which could take a few weeks), you'll be missing out on the best headphone jack, better cameras (not by much) and better battery life, for a similar price I think this is the best deal for snapdragon 855 phone.
If you don't mind paying a bit more and want the same features as the G8, go for the Samsung S10.
Click to expand...
Click to collapse
Is 10 really that big a deal from 9? I have 9 on my phone i could care less if it gets 10 and I am pretty sure it wont , lol

I feel like if we have temp root then it's only a matter of time before we get TWRP and roms. I just picked up an AT&T model for $178. Not sure if it's unlocked, but fairly easy through AT&T. Just worried if we have an exploit, updating to 10 might invalidate it.
I come from PS3/xbox 360 hacking, haha.

Question E-sim support

Hello anyone have any updates as how will be able to have esim or second physical sim activated on 926w (Canada) bought direct from samsung ,all discussions seems to hit a dead end
I really need at least 2 sim on this phone and getting a international version is not an option anymore
Thanks for any input
Happy New Year !

If you are in the USA, its not enabled. Samsung has told several people that it will be, once One UI 4.0 hits. We shall see

I lost hope on esim support for the U1 variant. Paying 2k for a phone and not having the option made me jump to the pixel 6 pro so I only have to carry one phone. Still holding onto the fold though in case it comes later on. If so, id jump from the pixel back to my fold.

What exactly is esim?

blizzyblake386 said:
What exactly is esim?
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What is an eSIM card? How will it impact you? | US Mobile
eSIM offers a new way to load carrier information onto your phone without using an external physical chip, enabling you to switch carriers on the spot.
www.usmobile.com

t3ch187 said:
I lost hope on esim support for the U1 variant. Paying 2k for a phone and not having the option made me jump to the pixel 6 pro so I only have to carry one phone. Still holding onto the fold though in case it comes later on. If so, id jump from the pixel back to my fold.
Click to expand...
Click to collapse
As European customer with Dual-SIM and eSIM Fold3 I'm not familiar, how Samsung and US carriers deliver the Fold3 in the States. According to your post, your fold is a single SIM device, is that right? Or do you have a carrier, that delivers eSIM support only?

In the USA it is one sim slot only. No dual sim, no Esim. On all carriers. Even unlocked

zapote21 said:
In the USA it is one sim slot only. No dual sim, no Esim. On all carriers. Even unlocked
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Click to collapse
My like is a like for you but is actually a dislike for the content because it's STUPID that US does not use eSIM more widely.
Where eSIM's are used more than anything else in the US is for Watches. I have a Gear Watch 3 (my Watch 4 is BT only) and it ONLY comes in eSIM and my carrier (T-Mobile) didn't even blink and just activated it. So the SUPPORT IS THERE, just too lazy for widespread adoption.
Get rid of the SIM slot and one less place for dust/water to get in!!

Talderon said:
My like is a like for you but is actually a dislike for the content because it's STUPID that US does not use eSIM more widely.
Where eSIM's are used more than anything else in the US is for Watches. I have a Gear Watch 3 (my Watch 4 is BT only) and it ONLY comes in eSIM and my carrier (T-Mobile) didn't even blink and just activated it. So the SUPPORT IS THERE, just too lazy for widespread adoption.
Get rid of the SIM slot and one less place for dust/water to get in!!
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Click to collapse
Also all iphones and all Pixels have Esim active

Forcing people to buy two phones instead of one amounts to big $$$

Markeee said:
Forcing people to buy two phones instead of one amounts to big $$$
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Ummm... this is AMERICA!! Where very company looks harder at the Bottom Line rather than do what's good for the customers or people...
Hell, all you have to do is look at our Medical Practices (Hospitals, insurance and most of all, Big Pharma) and you can CLEARLY see it's all about The Great Chase for the All Mighty Dollar...

But by not offering dual-SIM you loose dollars, because people buy iPhones and Pixels ...

Just got the second 4.0 update the Jan. Security update. Samsung still blocking US Esim support on the Fold 3

Markeee said:
Just got the second 4.0 update the Jan. Security update. Samsung still blocking US Esim support on the Fold 3
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Scamscum still blocking E-SIM? Ughhh. Glad I swapped my phone out for the Mexican Model.

Interesting, I thought Canada and Mexico have the same version phone and I know Canada does not have eSIM ability.

Sword Fish said:
Interesting, I thought Canada and Mexico have the same version phone and I know Canada does not have eSIM ability.
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Mexico has the International Version. Not the North American Version. I have the Mexican version and it has E-SIM

cworrell said:
Mexico has the International Version. Not the North American Version. I have the Mexican version and it has E-SIM
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Click to collapse
How’s you find a Mexican onr
I can’t even order one to the us via the Samsung site. Idk? No where else seems available to ship to us

This Samsung store near me sell only international phones I'm sure they would ship u one just make sure what you buy will run on your carrier
Samsung Store - Sunrise, FL
17 reviews of Samsung Store "I love Samsung products and I was looking forward to visit this brand new Samsung Store. Maybe I been to Apple Store too much and I was envisioning that it will be similar to that. But sadly it was really small with just one sample of each model for demonstration...
www.yelp.com

Anyone got t-mobile android 12 update? and can confirm no esim support whatsoever
Thanks

adika9 said:
Anyone got t-mobile android 12 update? and can confirm no esim support whatsoever
Thanks
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Click to collapse
Yup, and no eSIM support at all!

Question Flashed ATT firmware to VZW S22 901U - Still has VZW splash screen and software?

So I flashed the ATT firmware S901USQU1AVC8 to my Verizon S22 901U and the starting splash screen is still the Verizon logo and when I start the setup process it still requires Verizon activation via wifi and asks to login to Verizon account to use their "My Verizon" app.
I flash BL, AP, CP, CSC via Odin
Any way to get all ATT branding, splash screen, and apps?

The U vs the U1 variant may use different hardware... be warned. This is true with N10+ N975U vs N975U1. The C post pcb is completely incompatible between them. You see where this is going if the firmware controlling the hardware is different.

blackhawk said:
The U vs the U1 variant may use different hardware... be warned. This is true with N10+ N975U vs N975U1. The C post pcb is completely incompatible between them. You see where this is going if the firmware controlling the hardware is different.
Click to expand...
Click to collapse
I'm not using a U1, just a U and U firmware.

MrBaltazar said:
I'm not using a U1, just a U and U firmware.
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Click to collapse
Just be careful as AT&T is partnered with Samsung and actually influence the software and hardware used in many cases.
I'm not familiar with Verizon's practices.
Personally I leave the firmware alone; I don't upgrade or update if the phone is running well.
This N10+ in my hand is still running well on Pie.

blackhawk said:
Just be careful as AT&T is partnered with Samsung and actually influence the software and hardware used in many cases.
I'm not familiar with Verizon's practices.
Personally I leave the firmware alone; I don't upgrade or update if the phone is running well.
This N10+ in my hand is still running well on Pie.
Click to expand...
Click to collapse
I'm just trying to get all carrier services and branding from ATT working on the phone. Flashed the ATT firmware, not sure why or how Verizon branding is even still there?

MrBaltazar said:
I'm just trying to get all carrier services and branding from ATT working on the phone. Flashed the ATT firmware, not sure why or how Verizon branding is even still there?
Click to expand...
Click to collapse
Unless you want vid calling, the wifi stuff or maybe tethering (not sure if needed), I wouldn't worry about it. On my AT&T N10+ all AT&T apps and services are disabled. It runs fine.
My unlocked N10+ runs the same. I don't use vid calling or wifi.

Holy **** there's a ton of misinformation on here.
You need to flash the U1 software FIRST, then flash the AT&T software after that. You can't flash from carrier straight to another carrier. It even says this in the U1 firmware thread, in the very first post.
Personally, I'd just leave it as the U1 version.

entropism said:
Holy **** there's a ton of misinformation on here.
You need to flash the U1 software FIRST, then flash the AT&T software after that. You can't flash from carrier straight to another carrier. It even says this in the U1 firmware thread, in the very first post.
Personally, I'd just leave it as the U1 version.
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Click to collapse
I really don't know but do know that hardware is different on the AT&T Snapdragon from the unlocked variant. Is the Verizon using the same C port PCB as AT&T? Probably not.
Who knows unless you check the PN, if not the same it will puke on you... cam module may be a different PN too another member said. The C port PCB definitely is; apart and verified. The C port pcb is tied into phone and internet access
My unlocked N10+ has just about the same amount of bloatware as my AT&T variant*, all which is useless and package disable. As long as it has VoLTE and internet there's no point as to which version you use... pretty much same-same.
Lol, I hate the AT&T splash screen.
*the disable list is nearly identical less AT&T apps. Actually used the disable list imported from the N975U to set up the N975U1 Package Disabler

You’re 100% wrong here. All US models are absolutely identical hardware wise. Has been for years. If you have proof otherwise, please feel free to link it here.

entropism said:
You’re 100% wrong here. All US models are absolutely identical hardware wise. Has been for years. If you have proof otherwise, please feel free to link it here.
Click to expand...
Click to collapse
WRONG... maybe. I'll find out in a few months when I replace the battery again.
*Unfortunately I don't have images of the two different c port pcbs as the phone was apart.
I wish I did have the P/N to avoid getting the wrong part without pulling the rear cover first.
It was a repair shop and I really wish I had wrote down both numbers now. Ended up putting the old one back in.

entropism said:
Holy **** there's a ton of misinformation on here.
You need to flash the U1 software FIRST, then flash the AT&T software after that. You can't flash from carrier straight to another carrier. It even says this in the U1 firmware thread, in the very first post.
Personally, I'd just leave it as the U1 version.
Click to expand...
Click to collapse
Even though I don't have a U1 model? I have a regular S22 U model.

Correct. To flash from carrier to carrier, you need to go to U1 first. Personally I’d just stay on U1.

I have an unlocked S22 ultra....I tried to ODIN newer software a few months ago and I didn't put the HOME CSC in there and left it blank. Well, it completely erased everything (stupid me) and I had to start from scratch all over again. I was so mad at myself for not doing a backup before I tried to flash. Can the experts who have been doing this longer than I have tell me exactly what I need to do to make sure nothing gets erased and all of the settings stay in tact? I downloaded the newest S908USQS2AVDC TMB version. Is this going to put TMobile on my phone where I need to freeze apps I don't want or how do I carry over from the version I have now (S908U1UEUAVC8)? Or do I need to specifically wait for the unlocked version of the software?

phillthedrill said:
I have an unlocked S22 ultra....I tried to ODIN newer software a few months ago and I didn't put the HOME CSC in there and left it blank. Well, it completely erased everything (stupid me) and I had to start from scratch all over again. I was so mad at myself for not doing a backup before I tried to flash. Can the experts who have been doing this longer than I have tell me exactly what I need to do to make sure nothing gets erased and all of the settings stay in tact? I downloaded the newest S908USQS2AVDC TMB version. Is this going to put TMobile on my phone where I need to freeze apps I don't want or how do I carry over from the version I have now (S908U1UEUAVC8)? Or do I need to specifically wait for the unlocked version of the software?
Click to expand...
Click to collapse
Too bad about not having backed up first. But in some ways, you might be better off not having attempted to transfer all your personal data along with the new firmware. I have read here and elsewhere that the process is more likely to fail when attempting to transfer the personal data concurrently.
Hope everything worked out to your satisfaction.

Question Can I activate E-SIM by flashing it on another rom?

I ordered a Galaxy s22+, SM-S9060 and I don't have an e-sim on it.
This device should actually be identical to others and have the technology for E-Sim installed. Is it possible to activate an E-SIM by flashing it to another ROM or something like that?
I'm sorry, my English isn't the best.

Yes, I insatlled unlocked firmware on my T-Mobile S22 and e-sim shows up always. I asked customer care why, They said T-Mobile won't allow 2 sims in use if the phone is owing money, It has to be paid off to do whatever you want with it

miic6key said:
Yes, I insatlled unlocked firmware on my T-Mobile S22 and e-sim shows up always. I asked customer care why, They said T-Mobile won't allow 2 sims in use if the phone is owing money, It has to be paid off to do whatever you want with it
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Click to collapse
I understand you're new here, but you're giving out bad info. The international versions of these phones are NOT the US version.