Question flash a different bands SM-S918B - Samsung Galaxy S23 Ultra

I have an SM-S918B)
While I get 5g in the states, some bands are a little different so I fall back to 4g more often.
Is it possible to put a US firmware on the SM-S198B and get the US bands? I believe the hardware is the same.
I'd appreciate any education!

No you can't flash the International model with the US firmware, they are different hardware ,different motherboard and antennas , but i think T mobile supports the International version very well

hoss_n2 said:
No you can't flash the International model with the US firmware, they are different hardware ,different motherboard and antennas , but i think T mobile supports the International version very well
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It does once I enabled all the bands. But it's missing 71 which is what most of the T-Mobile 5G is Las Vegas uses.

Related

International Modem [7d-501L] on Chinese 4G Honor X1 [7D-503L]

Hi, despite the availability of the International 4g version of the X1 [7d-501L] in italy, that has all the LTE bands that I need, I bought the chinese 4g variant [7D-503L] in order to receive more and quicker updates.
Now, AFAIK the two versions are indentical in hardware, could a developer extract a modem from the international version and make it a flashable zip that we can put on our chinese 4g variants?
This way we could have the chinese 4g version with all the latest ROMs, but still enjoy FDD-LTE in Europe and rest of the world.
Sorry but it is not correct. The international version has a modem with only fdd frequencies, while the chinese version has fdd AND tdd. So, different modem.
You can search this area and you will find at least two others who have tried to do this, unsuccessfully!
I meant that the chinese version has a ton of TDD bands and only 2 FDD bands. Yes the modem is different, but I believe the difference is in software, not in actual hardware.
Hello you can flash 501l firmware on 503l device without any issue, for me. But I think hardware are not the same, 800mhz fdd LTE band is not present on 503l.
super_sonic said:
Hello you can flash 501l firmware on 503l device without any issue, for me. But I think hardware are not the same, 800mhz fdd LTE band is not present on 503l.
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I don't need that. I bought 503L to have all the latest rom, it wouldn't make sense to flash an older firmware. Yes 800 mhz is not present on 503L but I *strongly* suspect that it is disabled by software.
I really think that 501L and 503L are the same, the only thing being that Huawei enables certain bands on one, and other bands on the other one.
Yes I understand and it would be great. But when I flash 501l, I should have 501l modem? Maybe it is a hardware switch?
masimilianzo said:
I don't need that. I bought 503L to have all the latest rom, it wouldn't make sense to flash an older firmware. Yes 800 mhz is not present on 503L but I *strongly* suspect that it is disabled by software.
I really think that 501L and 503L are the same, the only thing being that Huawei enables certain bands on one, and other bands on the other one.
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I agree with you that hardware wise, all the different variations of the X1 are identical. Difference is software/firmware based. The difference is located in a partition that is usually not flashed by a ROM update. I successfully did this with my AT&T Samsung Note 2 and unlocked TMo AWS bands with the help of XDA instructions.
To assist you, I came across this website/blog that has instructions on how to unlock FDD bands on 503L. I have not tried it; I live in the US, even unlocking the FDD bands, I will not get LTE (main US LTE Bands are 2,4,17)
http://oiostore.blogspot.com/2014/11/how-to-unlock-fdd-lte-4g-band-support.html
Let is know how it goes if you decide to try it
acuratlsfan said:
I agree with you that hardware wise, all the different variations of the X1 are identical. Difference is software/firmware based. The difference is located in a partition that is usually not flashed by a ROM update. I successfully did this with my AT&T Samsung Note 2 and unlocked TMo AWS bands with the help of XDA instructions.
To assist you, I came across this website/blog that has instructions on how to unlock FDD bands on 503L. I have not tried it; I live in the US, even unlocking the FDD bands, I will not get LTE (main US LTE Bands are 2,4,17)
http://oiostore.blogspot.com/2014/11/how-to-unlock-fdd-lte-4g-band-support.html
Let is know how it goes if you decide to try it
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Thanks a lot!!!!!!!!!!! I am in travel at the moment so I dont have the device with me, I cant try this procedure.
Is there someone who can try??
masimilianzo said:
Thanks a lot!!!!!!!!!!! I am in travel at the moment so I dont have the device with me, I cant try this procedure.
Is there someone who can try??
Click to expand...
Click to collapse
Tried it on my 503L but nothing new...
:-/ Is there any developer who can help in this forum??
There is one blog claiming it works, but you two can't get it to work..........
Maybe it is not possible.
Maybe the modems are different after all.

Unlock all LTE bands on SM-G991b

I have a sm-g991b s21 5g. Trying to figure out how to unlock all the LTE modem bands, 5g would be a bonus. Right now it is the XSP CSC. I would like to unlock all the lte bands, or change the CSC to something that will work better here in Canada
Seems the XSP CSC only allows certain bands?
STZ-Mech said:
I have a sm-g991b s21 5g. Trying to figure out how to unlock all the LTE modem bands, 5g would be a bonus. Right now it is the XSP CSC. I would like to unlock all the lte bands, or change the CSC to something that will work better here in Canada
Seems the XSP CSC only allows certain bands?
Click to expand...
Click to collapse
I'm not much help, but have looked closely at these things. Yes, ea CSC region code is specific for that regions lte bands. The region code (rom) with the most enabled lte bands would be the 'Open' version for it's specific region.
There isn't, to my knowledge, a way to 'unlock all' lte bands. Some have flashed a different rom which has resulted in changing CSC, but that was a lot easier with earlier versions of android. With the most recent versions it's become more difficult. Some paid services supposedly can help with that.
But yer situation is worse. Your device is a (non-US) exynos chip device. And Canada uses the US type devices with Qualcomm Snapdragon chips. The roms are not interchangeable between device types. So there is no rom available for you to change to that would have the lte bands you need, unless some Asian country / region uses almost the same bands as Canada, which I don't think there is.
It's a hard lesson.

SM-G996B/DS support 5G in US

I have one unlocked Samsung G21+ International version under T-Mobile that doesn't connect to their 5G network. Is this a limitation in the phone? How can I check compatibility with their 5G?
Ventura
ventura57 said:
I have one unlocked Samsung G21+ International version under T-Mobile that doesn't connect to their 5G network. Is this a limitation in the phone? How can I check compatibility with their 5G?
Ventura
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Click to collapse
I think if you look at specs from gsmarena, you can see the 5g bands your variant is capable of. Assuming t-mo uses the sub6 technology, then just check which bands they use, if there's a match, it should work.
But, if t-mo uses mmwave exclusively, your device doesn't have that ability.
Should be pretty easy to find that info with google.
Yes, I did and unfortunately the frequencies from T-Mobile is not in G996B/DS .
ventura57 said:
I have one unlocked Samsung G21+ International version under T-Mobile that doesn't connect to their 5G network. Is this a limitation in the phone? How can I check compatibility with their 5G?
Ventura
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Click to collapse
No. Definitely not with T-Mobile or AT&T, don't know about Verizon.

Question Regional Model variants and their respective frequencies?

Does anyone have an authoritative link or source for the different S23 ultra regional model variants and their respective bandwidth frequencies such as for 4g and 5g?
Can't find this information for any including the USA variant eg which specific frequencies of 4g and 5g does the USA model support?
The chipset and x70 modem makes it possible for this phone to truly be a global phone but.....
asking the same as well, cant find these details.
Here's hoping that the band unlock methods for the s22's and s21's also work on the s23's.
jcsww said:
Here's hoping that the band unlock methods for the s22's and s21's also work on the s23's.
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I'm sure it will be the same to unlock the bands, no one will really know until they have one in hand.
Can you elaborate on these band unlock methods?
And could they unlock mmwave for example on the international variants so that 5g could work in US? And unlock international bands on US version so it could work everywhere else?
evangelionpunk said:
Can you elaborate on these band unlock methods?
And could they unlock mmwave for example on the international variants so that 5g could work in US? And unlock international bands on US version so it could work everywhere else?
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This is the thread you probably want to have a look at. This method also worked for the s21's.
How to Enable All Bands Through Service Menu on US/CA S22 series (including Sub-6 and mmWave)
What is this? This is a guide on how to enable all LTE and 5G bands on the US or Canadian S22 series phones by going through the service menu. This guide is mostly based on this S20U guide by mellojosh, but has been adapted for the S22U phone...
forum.xda-developers.com
jcsww said:
This is the thread you probably want to have a look at. This method also worked for the s21's.
How to Enable All Bands Through Service Menu on US/CA S22 series (including Sub-6 and mmWave)
What is this? This is a guide on how to enable all LTE and 5G bands on the US or Canadian S22 series phones by going through the service menu. This guide is mostly based on this S20U guide by mellojosh, but has been adapted for the S22U phone...
forum.xda-developers.com
Click to expand...
Click to collapse
Interesting....
So basically you could enter the service menu and turn on all the extra bands?
In that case wouldn't the US version be the best one to have since it would have mmwave hardware baked in too? It should then work everywhere.
Though it sounds like you'll lose the function on os updates and resets?
evangelionpunk said:
Interesting....
So basically you could enter the service menu and turn on all the extra bands?
In that case wouldn't the US version be the best one to have since it would have mmwave hardware baked in too? It should then work everywhere.
Though it sounds like you'll lose the function on os updates and resets?
Click to expand...
Click to collapse
OS updates from Samsung are never fast. Doing so once every 2 to 3 months isn't so bad for the extra band support.
Samsung's modem software works well for the US and Canada because the hardware is the same and only the modem software separates the bands based on carrier/region. Due to the wide spread of mess across North America, US and Canadian models are always a good choice for potential band support. In some cases though, mixed ROM's can also bridge the support. In the S9 days, you could.jeep.the base.for.your region but flash the carrier side of the firmware to unlock band 71 on some overseas models. I don't know if this is still possible today but with all devices being very similar. I am hoping the hardware, including dual-SIM pins on the main board, will be there to enable through a firmware change or mod.
Do we know if the international dual sim variant has the same USA hardware based on s22/21/20?
Does it have mmwave baked in but just disabled by software?
I am still not clear what 5G bands are supported on the SM-S918BZKPEUB, nor if unlocking the bands through the service menu works. @UK S23, your deliveries are in place already, has anyone tried?
It seems as though the bands might only be disabled in software? If so, then it should be possible to enable whatever band you need. The only exception would be if a hardware component is needed or missing then it wouldn't be possible which likely wouldn't be the case for your 3g, 4g and 5g standard range. Maybe only 5g mmwave which is essentially only in US anyway.
If that's the case it sounds like US variant might be the best to get for global coverage barring lack of dual sim (though it does have physical+esim).
evangelionpunk said:
It seems as though the bands might only be disabled in software? If so, then it should be possible to enable whatever band you need. The only exception would be if a hardware component is needed or missing then it wouldn't be possible which likely wouldn't be the case for your 3g, 4g and 5g standard range. Maybe only 5g mmwave which is essentially only in US anyway.
If that's the case it sounds like US variant might be the best to get for global coverage barring lack of dual sim (though it does have physical+esim).
Click to expand...
Click to collapse
Samsung's band support is mostly software, at least when it comes to 4G and 5G. I have never bothered to change 2G and 3G bands because there is no use for them unless you are in a very rural area or roaming. This is why it is so easy to convert the North American models and why in the days of the S9+, you could get band 71 on international models with dual-SIM.
jcsww said:
Samsung's band support is mostly software, at least when it comes to 4G and 5G. I have never bothered to change 2G and 3G bands because there is no use for them unless you are in a very rural area or roaming. This is why it is so easy to convert the North American models and why in the days of the S9+, you could get band 71 on international models with dual-SIM.
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Click to collapse
Correct me if I'm wrong but you can't get mmwave bands on the international dual sim models right?
evangelionpunk said:
Correct me if I'm wrong but you can't get mmwave bands on the international dual sim models right?
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Click to collapse
I'm not sure when it comes to mmWave. You can enable it on the W for Canada even though the cell coverage and technologies used up there are probably never going to deploy it. Overseas, I have no idea.
jcsww said:
I'm not sure when it comes to mmWave. You can enable it on the W for Canada even though the cell coverage and technologies used up there are probably never going to deploy it. Overseas, I have no idea.
Click to expand...
Click to collapse
I've read that the US and CA models are basically identical so that might explain it. It's also possible I suppose that in s23 since it uses x70 modem, which has native support built in, that all model variants might be able to do it but for software. Though we won't know for sure till someone from different region goes into their service menu and checks.
mmWave requires a specific antenna to function. This antenna used to cost like $50 but I'd be surprised if it's gone down much beyond $30 so manufacturers will still leave it out if it's not necessary.
EtherealRemnant said:
mmWave requires a specific antenna to function. This antenna used to cost like $50 but I'd be surprised if it's gone down much beyond $30 so manufacturers will still leave it out if it's not necessary.
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Click to collapse
Thanks and that probably means it likely won't be in other region variants.
Personally, I'd just make a single phone that is globally universal and can be used everywhere. The massive scale should drop the component pricing considerably. Carrier exclusives and market restrictions if any needed in software only. But that's just me lol.
evangelionpunk said:
Thanks and that probably means it likely won't be in other region variants.
Personally, I'd just make a single phone that is globally universal and can be used everywhere. The massive scale should drop the component pricing considerably. Carrier exclusives and market restrictions if any needed in software only. But that's just me lol.
Click to expand...
Click to collapse
Yes, you would think they would do this, but Samsung has always customized difference models for different regions so it must not be that straightforward. I believe that regulatory bodies would require them to test and submit all the documentation for that extra antenna, for example. It also wouldn't surprise me if the mmWave equipment is outright banned in some regions either for whatever reason.
EtherealRemnant said:
Yes, you would think they would do this, but Samsung has always customized difference models for different regions so it must not be that straightforward. I believe that regulatory bodies would require them to test and submit all the documentation for that extra antenna, for example. It also wouldn't surprise me if the mmWave equipment is outright banned in some regions either for whatever reason.
Click to expand...
Click to collapse
Yeah.
Are iphones globally all exactly the same now?
evangelionpunk said:
Yeah.
Are iphones globally all exactly the same now?
Click to expand...
Click to collapse
No. There are 5 different models of iPhone 14 Pro Max, for example, and each will have different band configurations.
That said, the NA models have the most complete bands of any device released so far this year and it was released last year with an older modem. They even have support for Dish Network's n70, a band exclusive to them worldwide, something Samsung didn't even choose to support on their NA variant this year despite having a contract with Dish for radio equipment supporting that band.
I actually think the NA iPhone 14 Pro models support every commercially available band worldwide but I don't really keep up on bands not used in the US.
iPhone 14 Pro Max Model Number A2651, A2893, A2894, A2896, A2895 Differences - TechWalls
The iPhone 14 Pro Max comes in 5 model numbers, which are A2651, A2893, A2894, A2896, and A2895. Let's check out their differences and all the part numbers.
www.techwalls.com

Question USA & Canada different hardware exchangeable firmware while others aren't

I have a question in my mind, why the USA S23U "S918U" & the Canadian S23U "S918W" can accept each other's Firmware despite having different hardware " Canadian S23U doesn't have mm-wave antennas " while other models like S918E, S918N & Chinese S9180 can't exchange Firmware while having very similar hardware & also can't accept American & Canadian Firmware very strange indeed.
They don't have different hardware. The only physical difference is that the W versions are missing the mmWave antenna.
jcsww said:
They don't have different hardware. The only physical difference is that the W versions are missing the mmWave antenna.
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Same for S918E and S9180 they have even same antenna array and same motherboard but their Firmwares are not exchangable
Is there a way to tell what hardware bands your phone supports? Not which are unlocked etc?

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