Unlock all LTE bands on SM-G991b - Samsung Galaxy S21 Questions

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.

Related

Galaxy Note 8 variants list and OXM CSC break-down

Had made the same thread in the S8+ forums when I had that phone, however I upgraded to the N8 and have made the same thread here since it helped a lot of people in the S8 forum.
Full list of available Note 8 variants with all supported bands and storage options:
Samsung Galaxy Note 8 Variants List
List of all CSCs included in the OXM CSC:
Samsung Multi-CSC OXM
Suggestions are welcome, and as I've pointed out, if you've spotted any errors, issues or inconsistencies within the document, you can drop me a PM here and I'll fix it.
Cheers,
murtaza02
murtaza02 said:
Had made the same thread in the S8+ forums when I had that phone, however I upgraded to the N8 and have made the same thread here since it helped a lot of people in the S8 forum.
Full list of available Note 8 variants with all supported bands and storage options:
Samsung Galaxy Note 8 Variants List
List of all CSCs included in the OXM CSC:
Samsung Multi-CSC OXM
Suggestions are welcome, and as I've pointed out, if you've spotted any errors, issues or inconsistencies within the document, you can drop me a PM here and I'll fix it.
Cheers,
murtaza02
Click to expand...
Click to collapse
Why starting this thread, while the OXM-info is already here:
https://forum.xda-developers.com/showpost.php?p=73879369&postcount=3
Your document could also be implemented in that message (you just had to ask!)...
henklbr said:
Why starting this thread, while the OXM-info is already here:
https://forum.xda-developers.com/showpost.php?p=73879369&postcount=3
Your document could also be implemented in that message (you just had to ask!)...
Click to expand...
Click to collapse
The document I linked shows what each CSC actually stands for.
You can link it in the first post if you want.
murtaza02 said:
Had made the same thread in the S8+ forums when I had that phone, however I upgraded to the N8 and have made the same thread here since it helped a lot of people in the S8 forum.
Full list of available Note 8 variants with all supported bands and storage options:
Samsung Galaxy Note 8 Variants List
Click to expand...
Click to collapse
This is brilliant. Thanks! Have been trying to find a complete, intelligible list for a few days now. Should have started at XDA of course ...
Small correction: XEH stands for Hungarian unlocked only, Vodafone, Telenor and T-Mobile all have their own CSC codes (VDH, PAN and TMH, respectively - PAN because Telenor used to be Pannon GSM Hungary).
Am i correct that in the US, the carrier variants and even the unlocked version are all identical hardware with the same bands supported and it's just the software is different?
Almighty1 said:
Am i correct that in the US, the carrier variants and even the unlocked version are all identical hardware with the same bands supported and it's just the software is different?
Click to expand...
Click to collapse
Yes you are correct.
There's a carrier switching guide in the forums as well.
Sent from my G8142
murtaza02 said:
Yes you are correct.
There's a carrier switching guide in the forums as well.
Click to expand...
Click to collapse
Yeah, I saw the carrier switching guide. I was just confused as someone mentioned that the hardware was all the same so the band support is the same except the carrier might have their own bloatware but the page below seems to indicate that the unlocked US and US Carriers is different when it came to band support. Can I get the Verizon version and have all the bands enabled or do I have to get the unlocked US version?
https://www.techwalls.com/samsung-galaxy-note-8-sm-n950-model-number-differences/
Almighty1 said:
Yeah, I saw the carrier switching guide. I was just confused as someone mentioned that the hardware was all the same so the band support is the same except the carrier might have their own bloatware but the page below seems to indicate that the unlocked US and US Carriers is different when it came to band support. Can I get the Verizon version and have all the bands enabled or do I have to get the unlocked US version?
https://www.techwalls.com/samsung-galaxy-note-8-sm-n950-model-number-differences/
Click to expand...
Click to collapse
That article is a steaming pile of BS.
The US variants all support the same bands.
murtaza02 said:
That article is a steaming pile of BS.
The US variants all support the same bands.
Click to expand...
Click to collapse
Thanks, just wanted to make sure that I get the right one so when I travel outside the U.S., it will support everything. Am I correct that the only difference might be some may have bootloaders that won't be unlocked while others might when it came to carrier variants?
Almighty1 said:
Thanks, just wanted to make sure that I get the right one so when I travel outside the U.S., it will support everything. Am I correct that the only difference might be some may have bootloaders that won't be unlocked while others might when it came to carrier variants?
Click to expand...
Click to collapse
Well actually, Samsung locked everyone out so it doesn't really matter which variant you have, both the N950U (carrier variants) and N950U1 (unlocked variants) have locked bootloaders.
All of them should work fine outside the US when roaming, wouldn't really recommend it if you live outside the US though.
Yeah, I meant I thought some bootloaders would become unlocked later, I just know the Verizon one never seems to get unlocked compared to T-Mobile for example even with other brands of phones. If I had a choice, I would get the 128GB model which is available outside the U.S. except I don't know if it supports all the U.S. bands. Just wished Samsung was like Apple when it came to band support like the unlocked SIM free which seems to have support for all bands except for Japan when it came to 4G LTE as without the proper support, it will roam but be in 3G for data instead of 4G. With that said, just looked at the chart you provided and it seems like the SM-N9500 would be ideal for the 128GB or 256GB internal storage except it is missing the following bands which is on the US models:
3G (UMTS/HSPA): 1700
4G (LTE): B13, B17, B18, B29, B30, B66, B252, B255
So it seems it is actually the US model that has more band support while the China model has more internal storage.
Almighty1 said:
Yeah, I meant I thought some bootloaders would become unlocked later, I just know the Verizon one never seems to get unlocked compared to T-Mobile for example even with other brands of phones. If I had a choice, I would get the 128GB model which is available outside the U.S. except I don't know if it supports all the U.S. bands. Just wished Samsung was like Apple when it came to band support like the unlocked SIM free which seems to have support for all bands except for Japan when it came to 4G LTE as without the proper support, it will roam but be in 3G for data instead of 4G. With that said, just looked at the chart you provided and it seems like the SM-N9500 would be ideal for the 128GB or 256GB internal storage except it is missing the following bands which is on the US models:
3G (UMTS/HSPA): 1700
4G (LTE): B13, B17, B18, B29, B30, B66, B252, B255
So it seems it is actually the US model that has more band support while the China model has more internal storage.
Click to expand...
Click to collapse
That is correct. Chinese variant and Korean variants have the most storage options while the rest of the world is left with 64GB only.
Sent from my G8142

Will S9 plus work in pakistan

Will galaxy s9 plus snapdragon variant work in pakistan means that will it support all pakistani mobile network (ufone, telenor, mobilink, zong etc.) Will s9 plus snapdragon variant support pakistani mobile network frequencies and LTE bands?
Yes it will work don't worry.
In Pakistan there are only 3 different frequency used for 3g n 4g.
1800mhz 2100mhz 850mhz
Mostly Snapdragon version supports all bands but carrier may restrict VOLTE....to mobiles with their CSC... S9plus other than Snapdragon might got multi CSC which loads own country CSC, when start using from reset with that country sim..
Also if you use Snapdragon 965U1, even though samsung pay works, you gotta need to forget about rewards as they are mostly restricted for USA..
Ofcourse I m unable to VOLTE in India as I m restricted to XAA CSC

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.
Click to expand...
Click to collapse
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?
Click to expand...
Click to collapse
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.
Click to expand...
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?
Click to expand...
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.
Click to expand...
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 flash a different bands SM-S918B

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
Click to expand...
Click to collapse
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.

Question SM-S918b Verizon Question

Does anyone have this variant running on verizon? If so how does it work?
You can always check the bands that model supports vs the bands for Verizon in the area you plan on using it. Both sets of information are available online. Cell mapper I believe is the app you see what bands and networks are in your area and GSMArena should have the bands listed for that model.
I have looked and 4g has all the bands 5g is missing the mmv ones but can't find anything on 3g for either one.
elevatorguy said:
I have looked and 4g has all the bands 5g is missing the mmv ones but can't find anything on 3g for either one.
Click to expand...
Click to collapse
I looked it up and yeah the only models that support us 5g mmw is U/U1 models so no 5g and likely 3g isn't supported on models that are outside us is my guess.

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