Develop Bugs

Korean note 4 on at&t in usa

Hello all and thanks for taking the time to read my post. I know it's probably something that has been addressed here but today is my first day on the forum so I thought I would just ask.
I have a korean note 4 and I want it to work on my at&t network in the usa. I got everything to work except for 4g. Any idea if there's a way to get the 4g to work or should I just give up? It's the 8 core model.

From what I understand Korea and the USA use different frequencies, and different technologies for 4g. I don't think this is possible. Should be automatic.
You could see if you could try different network settings:
Dial *#*#4636#*#*

Galaxy S9 LTE support

Hey guys, currently live in the UK and am looking to purchase the S9, the model that catches my eye is the SM-G965FD*(Asian Model) as I've read the dual sum variant supports dual sim LTE/4G (Both sims can connect to 4G) and hopefully this is simultaneous like the Mate 10 Pro is.
Now I have a question, I know the phone will work on 4G here as I've checked the bands, but I'll be visiting Argentina soon for a month or so and I am wondering if it works there. As I've read that North and South America uses a type of LTE called AWS, I don't believe this is used in the UK or Europe.
Just wondering so I don't arrive there with a local SIM and be dissapointed. Also can someone confirm this variant does support Dual SIM 4G/LTE as the global variant is 4G/LTE in SIM slot 1 and only 3G-2G in SIM 2.
Cheers!

SM-N976V Note 10 plus 5G portability (carrier switch)

I'm looking to spend on Note 10 plus 5G, currently on Verizon but the biggest question that I couldn't find the answer is if in the future, I will have to stay with Verizon forever if I want to use 5G on this phone.
Samsung released different snapdragon models for each carrier, but what if I want to switch to Tmobile or AT&T with this phone? Is there a workaround to make these phones work with different carriers, especially with 5G?
S10 5G is out for many months, but I couldn't find a thread showing portability. Although selling the phone for a discounted price and buying other one that works on different carrier is an option, looking to find if it is practical to use 5G when we switch carrier.
Thank you

Cashreedhar said:
I'm looking to spend on Note 10 plus 5G, currently on Verizon but the biggest question that I couldn't find the answer is if in the future, I will have to stay with Verizon forever if I want to use 5G on this phone.
Samsung released different snapdragon models for each carrier, but what if I want to switch to Tmobile or AT&T with this phone? Is there a workaround to make these phones work with different carriers, especially with 5G?
S10 5G is out for many months, but I couldn't find a thread showing portability. Although selling the phone for a discounted price and buying other one that works on different carrier is an option, looking to find if it is practical to use 5G when we switch carrier.
Thank you
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once its sim unlicked it will workbwith other carriers.. ive tried it on multiole sims from dif carriers

The lte radios should be the same, the 5g will never work across carriers for now considering theyre taping into different spectrum. Modems and antenna designs are different between the different 5g methodology each carrier adopted.

elliwigy said:
once its sim unlicked it will workbwith other carriers.. ive tried it on multiole sims from dif carriers
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That is very nice to hear. Does the phone work with other carriers once sim unlocked without changing the phone software? Does 5G work on other carriers too, if the bandwidths match? Thanks

coilbio said:
The lte radios should be the same, the 5g will never work across carriers for now considering theyre taping into different spectrum. Modems and antenna designs are different between the different 5g methodology each carrier adopted.
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I may not understand much details of these modems, however my understanding is that there are some 5G bands common between carriers.
Verizon holds 76% of total available 28GHz spectrum bands and and 48% 39GHz 5g spectrum bands.
At&T holds 40% of 39GHz bands and Tmobile holds 12% of 28GHz bands. If I'm not mistaken the modem in Note 10 5G model supports 600MHz which is new Tmobile band. So, if Note 10 modem supports those 2 5G bands on verizon, technically it should work on at&t and t-mobile too? Although these may work in different cities as of now

Yes and no, I don't know if it has the right antennas, they matter to match the signal length and the obvious is how locked the radio is.
You forget Verizon are evil about keeping their phones there.
It could be the phone is capable but will never be able because it's a Verizon phone and they nerfed something.

coilbio said:
Yes and no, I don't know if it has the right antennas, they matter to match the signal length and the obvious is how locked the radio is.
You forget Verizon are evil about keeping their phones there.
It could be the phone is capable but will never be able because it's a Verizon phone and they nerfed something.
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Click to collapse
In the past we were able to unlock blocked antenna bands using Qualcomm QPST tool and hope there will be possibilities in the future. It's not that Verizon is evil, it applies to all carriers. There has been court ruled regulations that enabled users to take their device to other networks, but blocking 5G would be inconvenience to users, as we all know 5G is the future. I'm going to grab a Note 10 plus 5G for now

Cashreedhar said:
In the past we were able to unlock blocked antenna bands using Qualcomm QPST tool and hope there will be possibilities in the future. It's not that Verizon is evil, it applies to all carriers. There has been court ruled regulations that enabled users to take their device to other networks, but blocking 5G would be inconvenience to users, as we all know 5G is the future. I'm going to grab a Note 10 plus 5G for now
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technically they wouldnt be blocking anything if they just dont include the antennae/functionailt.. its then up to the user to research and purchase if it suits their needs.

Follow up:
After Verizon unlocked the phone, surprisingly 5G works with Tmobile without any modification. Of course not all the bands. Haven't had 5G signal so far and suddenly when I'm standing near a 5G antenna in downtown Manhattan, I had full signal

I have the same phone. I was not able to see 5G with TMobile or AT&T. I am also not able to get the Verizon hardware off my phone. ( boot logo, etc.) Any work arounds?

Odd. I have the 5G on VZW thats unlocked. My phone works fine with my TM SIM but does not pickup 5G even though my OnePlus 7T Pro McLaren gets 5G.

Milyenair said:
I have the same phone. I was not able to see 5G with TMobile or AT&T. I am also not able to get the Verizon hardware off my phone. ( boot logo, etc.) Any work arounds?
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Click to collapse
nope.
the n976v only has vzw and gcf csc codes on it which both use the vzw sales code n network code.. changing carriers should work but on network as the csc should recognize this and load the correct apns n such but the bootani n vzw stuff is there to stay..

Mike02z said:
Odd. I have the 5G on VZW thats unlocked. My phone works fine with my TM SIM but does not pickup 5G even though my OnePlus 7T Pro McLaren gets 5G.
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not odd.. its a vzw branded 5g device.. its hit or miss on other 5g networks.. they typically use different bands and frequencies and 5g variants dont contain full csc for other carriers like the non 5g devices

So I'm having an issue, I'm trying to get my phone to work with Total Wireless but for some reason I cannot adjust the APN and they can't send me an update to my sim card. I can get the calls and text to work and it shows 4g but no data due to the incorrect APN. Its all grayed out with no way to add or configure it. The IMEI also says its not compatible with Total Wireless which is weird since all other verizon phones have worked before except this Note 10+ 5g.

CamachoDjr said:
So I'm having an issue, I'm trying to get my phone to work with Total Wireless but for some reason I cannot adjust the APN and they can't send me an update to my sim card. I can get the calls and text to work and it shows 4g but no data due to the incorrect APN. Its all grayed out with no way to add or configure it. The IMEI also says its not compatible with Total Wireless which is weird since all other verizon phones have worked before except this Note 10+ 5g.
Click to expand...
Click to collapse
probably need root

CamachoDjr said:
So I'm having an issue, I'm trying to get my phone to work with Total Wireless but for some reason I cannot adjust the APN and they can't send me an update to my sim card. I can get the calls and text to work and it shows 4g but no data due to the incorrect APN. Its all grayed out with no way to add or configure it. The IMEI also says its not compatible with Total Wireless which is weird since all other verizon phones have worked before except this Note 10+ 5g.
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Click to collapse
Where did you buy this phone? I had the same issue, when I changed the code to GCF from VZW. I had to send the phone back to Samsung, as the local samsung experience store couldn't even understand the problem. GCF is for Samsung diagnostic purposes only and they had to change the motherboard board on the phone in order to fix the issue. If your carrier 5g mmwave band is one of the band used by Verizon, you'll be able to use 5G with this phone. I was able to use 5G in NYC with TMOBILE, but not when I moved to a different state.

Mike02z said:
Odd. I have the 5G on VZW thats unlocked. My phone works fine with my TM SIM but does not pickup 5G even though my OnePlus 7T Pro McLaren gets 5G.
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Click to collapse
I can relate the issue you're facing. I was using this phone with TMobile 5G in NYC, but when I moved to different state, I can't get the 5G reception. In order to understand this further, you need to understand the frequencies supported by TMobile and frequencies owned by Verizon. TMobile shares one of Verizon's mmwave band (only around 25%) and these antennas are limited to only few metro cities. Even if you live in one of those big cities, you need to stand close to the 5G antenna in order to get the 5G signal. I remember that I had to stand within 50ft from the antenna in order to get 5G signal (downtown Manhattan near Meridian Lane and Water st).

So I'm new to this. Ive got a Note10+ 5G from Verizon (SM-N976V). Ported over from Verizon to At&t. Works fine accept its on 4G LTE (no 5G... the Samsung S9+ went over to 5G no issues). I am told if I flash the phone to the unlocked firmware it should get rid of the Verizon "lock" and work. I have tried this as per help form Android Central however having no success flashing... I am not exactly that savvy with this stuff... Please help

elliwigy said:
once its sim unlicked it will workbwith other carriers.. ive tried it on multiole sims from dif carriers
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Click to collapse
elliwigy, please let me know how you got your SM-N976V to work on other carriers. I've been trying to get mine to work on Visible and I can not change the APN settings.

mbmallette said:
elliwigy, please let me know how you got your SM-N976V to work on other carriers. I've been trying to get mine to work on Visible and I can not change the APN settings.
Click to expand...
Click to collapse
You can network unlock it pretty easily even if the phone isn't paid off yet. Download setedit by 4a from the play store:
https://play.google.com/store/apps/details?id=xyz.paphonb.systemuituner
and change the setting "vzw_network_lock" from a 1 to a 0. You'll have to buy the expansion pack from 4a to have a foreground guardian that'll prevent it from going back to a 1.
(
https://imgur.com/qaZl4d9
)

Best firmware for note 10 plus USA in France?

Hello,
I have a note 10+ of US origin with snapdragon 855, I want to use it in Europe (France) in order to have the best possible network.
I installed the firmware N975U1 XAA but I don't have 4G + (I only have the LTE logo, no LTE +), a lot problem of concern for notification with my mailboxes.
So I would have liked to know if there was a more suitable firmware for France in order to have the 4G logo which replaces the LTE logo? and maybe be able to receive 4G +?
I know I cannot install the XEF firmware because the processor is not the same.
Thanks for your help

Hello ,
I'm surprise ! Your provider ? Your mobile network coverage ? If you have another mobile , full XEF , what result on the same place ? switch off !

I use the Orange network. the network is the same with another mobile except that I receive 4g + while there it is simple lte. I know there is normally lte + in us. so know if it is possible to have a firmware allowing to have 4g +. after maybe nothing to do but I receive with great difficulty the notifications gmail and other mailbox. I have however reinstalled everything several times but no change.

does anyone know if this is possible? or a tweak that allows you to do it? thank you

4G, 4G+, lte, lte+, lteA, 5G, etc, are sevice provider dependant, so, you will get what the carrier gives you, no way to obtain services that other carriers provide

I'm using a Canadian Note 10+ (N975W) here in the UK which is working flawlessly, I have full 4G+, VoLTE & WiFi calling, the only thing that doesn't work is Samsung Pay which I knew anyway, and as I use Google Pay, it isn't a issue :highfive:

Firstly search the bands that your phone uses with its model name on GSM arena, then the ones used by the carriers you'll need for both countries.
Then with the RNC mobile app or with Activity Launcher, search "hidden" and launch the one under "paramètre d'appel"
You'll be able to see what bands are actually used by your current carrier.
Since the protocol names and frequency aggregation hints are carrier specific, you may already use 4G+ without knowing.

Hello, I'm going back to the topic because I still don't have a solution at the moment. I had the opportunity to have a French Note 10 alongside with the same operator, I had the "4G +" (LTE+) logo, the speeds were tested at 300 mega / sec. With my 10+ USA rating stuck on the LTE logo I only get 50 mega / sec ...: /
according to my research this is a carrier aggregation problem.
How to unlock it?
I just tried the Canadian rom and the same, no support for LTE + or 4G +, the speeds are as low as with the US version

Questions about G9880 and T-Mobile

I have a bootloader unlocked, rooted Galaxy S20 Ultra SM-G9880 (Hong Kong version) that I am using on T-Mobile. However, I had some doubts about how it interacts with the various bands.
The phone does not support some of T-Mobile's LTE bands, and it does not seem to support any of their current 5G bands. Is there any way to change this with CSC changes or any other trickery?
Would AT&T be better for any of this?
When I use the Samsung band selector app, I see that NR B41 is supported. This is the Sprint spectrum that T-Mobile is repurposing, correct? Does that mean additional 5G and LTE coverage once the rollout is complete?
Another user was having problems enabling carrier aggregation. Is there a way of doing this?

Jonah50 said:
I have a bootloader unlocked, rooted Galaxy S20 Ultra SM-G9880 (Hong Kong version) that I am using on T-Mobile. However, I had some doubts about how it interacts with the various bands.
The phone does not support some of T-Mobile's LTE bands, and it does not seem to support any of their current 5G bands. Is there any way to change this with CSC changes or any other trickery?
Would AT&T be better for any of this?
When I use the Samsung band selector app, I see that NR B41 is supported. This is the Sprint spectrum that T-Mobile is repurposing, correct? Does that mean additional 5G and LTE coverage once the rollout is complete?
Another user was having problems enabling carrier aggregation. Is there a way of doing this?
Click to expand...
Click to collapse
You can't change to a US CSC on your device. Some users are reporting 5G works only on SIM2. Carrier Aggregation isn't compatible in the US with the SM-G9880. I have the Hong Kong variant on T-mobile and 4G LTE works fine.

varcor said:
You can't change to a US CSC on your device. Some users are reporting 5G works only on SIM2. Carrier Aggregation isn't compatible in the US with the SM-G9880. I have the Hong Kong variant on T-mobile and 4G LTE works fine.
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Click to collapse
Would you happen to know if our imei works with 5g on t mobile? I just switched last month from att. On att, you would have to call and give an att imei in order for 5g to work and I'm wondering if t mobile is the same way or if it works out of the box with our imei.
Also, I have an SD card and seems like I cannot have a Sim on slot 2 and an SD at the same time, do you happen to know if an esim will get 5g?

m_reyna_16 said:
Would you happen to know if our imei works with 5g on t mobile? I just switched last month from att. On att, you would have to call and give an att imei in order for 5g to work and I'm wondering if t mobile is the same way or if it works out of the box with our imei.
Also, I have an SD card and seems like I cannot have a Sim on slot 2 and an SD at the same time, do you happen to know if an esim will get 5g?
Click to expand...
Click to collapse
That's a question for T-mobile. It's not a question of your IMEI, it's whether or not your device's available 4G and 5G bands are compatible with T-mobile. I don't know what model you have but if it's a US model eSim isn't available on S20 devices. Only Exynos devices have eSim capabilities.

varcor said:
That's a question for T-mobile. It's not a question of your IMEI, it's whether or not your device's available 4G and 5G bands are compatible with T-mobile. I don't know what model you have but if it's a US model eSim isn't available on S20 devices. Only Exynos devices have eSim capabilities.
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Click to collapse
I have the same model that's been on topic... The SM-G9880...

SM-G9880 isn't eSim enabled, only Exynos variants offer this. 5G may work, take it to your local T-mobile store and see if they can set it up. Often times information coming from a CSR over the phone isn't reliable. If it worked with AT&T on SIM 1 T-mobile it MAY work as well however many users have stated it only works on SIM 2. Even though T-mobile's 5G network has a larger coverage area they can't match the speed of AT&T's mmWave network.

varcor said:
That's a question for T-mobile. It's not a question of your IMEI, it's whether or not your device's available 4G and 5G bands are compatible with T-mobile. I don't know what model you have but if it's a US model eSim isn't available on S20 devices. Only Exynos devices have eSim capabilities.
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Click to collapse
I know that some people were trying to enable eSIM on rooted Snapdragon S20 Ultra devices. Did anything ever happen with that?

Jonah50 said:
I know that some people were trying to enable eSIM on rooted Snapdragon S20 Ultra devices. Did anything ever happen with that?
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Click to collapse
If you root the device I suppose it's possible to override an eSim block on the SM-G9880 but I'm not aware of anyone achieving it. The only Snapdragon variant which offers eSim at this time is the Galaxy Fold. I don't understand what the value of eSim is on a Dual SIM device. Even if you travel to a different country it's a simple choice, keep the SD Card in or use both SIM's and rely on internal memory for storage.

Did anyone try using BRI CSC to see if CA works in the USA?