Question Flash Korean snapdragon firmware to G998U1 to change available 5G bands - Samsung Galaxy S21 Ultra

Hello,
can I flash the Korean snapdragon firmware to an American model (G998U1)?
If yes, will this change the available 5G bands to the ones in Korea? Thanks.

Korean model is Exynos this year.
Also, from reading the specs on Samsung Korea's Web site, it only supports N78 & N77 Sub6 bands
https://www.samsung.com/sec/smartphones/galaxy-s21-ultra-5g/specs/

Yesterday I tried flashing my U1 with a Taiwanese firmware and it did not succeed. I'm having the same issues with bands. Where I am they are using bands B3 + B20 for carrier aggregation. So right now I am only able to get LTE and not LTE-Advanced. I guess I'm missing some sort of profile? Because the phone does support these bands.

Dolgogi said:
Korean model is Exynos this year.
Also, from reading the specs on Samsung Korea's Web site, it only supports N78 & N77 Sub6 bands
https://www.samsung.com/sec/smartphones/galaxy-s21-ultra-5g/specs/
Click to expand...
Click to collapse
hong kong model is snapdragon
Can I do that?

hmi11 said:
hong kong model is snapdragon
Can I do that?
Click to expand...
Click to collapse
Unlikely, since dark11b said he tried Taiwan and it didn't work.
I think Taiwan & Hong can be cross flashed, but not with American models, for some reason.

Related

[Q] Galaxy Note with LTE 2600 and NFC?

The Galaxy Note is unfortunately sold in many different versions, because humanity did not manage to agree on a single frequency for LTE.
Where (in what NATION or in what SHOP) can people buy:
Galaxy Note version with LTE 2600 and NFC.
Does the Korean version have LTE 2600?
Does the Hong Kong version have LTE 2600?
ALL LTE versions are without EXYNOS, right?
Come on people, no answer?
One of you must have this version.
legion1911 said:
The Galaxy Note is unfortunately sold in many different versions, because humanity did not manage to agree on a single frequency for LTE.
Where (in what NATION or in what SHOP) can people buy:
Galaxy Note version with LTE 2600 and NFC.
Does the Korean version have LTE 2600?
Does the Hong Kong version have LTE 2600?
ALL LTE versions are without EXYNOS, right?
Click to expand...
Click to collapse
Only Korea have the LTE/NFC version with SnapDragon MSM8260 1.5Ghz dualcore.
Exynos doesn't support LTE and is better then snapdragon in Korean note version.
Sent from my GT-N7000 using Tapatalk
dt33 said:
Only Korea have the LTE/NFC version with SnapDragon MSM8260 1.5Ghz dualcore.
Exynos doesn't support LTE and is better then snapdragon in Korean note version.
Sent from my GT-N7000 using Tapatalk
Click to expand...
Click to collapse
What LTE frequencies does the Korean Note use?

Questions about Nexus 6

As the title says, i need to know since i wont find anything anywhere.
Next month ill be buying the Nexus 6 comming from a note 3
Whats the difference in model number? Eg XT1100, XT1103
International and US version of the phone.
Is there any hardware specific modem changes that i should be aware of before buying it?
Does it matters to me? (Living in Sweden)
Are all custom roms compatible with both model numbers?
Thanks in advance.
International model (XT1100) is made for GSM, as networks in the developed world are all GSM.
N. America model (XT1103) is backwards-compatible with CDMA2000, and also supports some LTE bands unique to the US (Sprint & Verizon, mostly).
Unless noted otherwise by the dev, all the roms here are supported on both models.
synisterwolf said:
International model (XT1100) is made for GSM, as networks in the developed world are all GSM.
N. America model (XT1103) is backwards-compatible with CDMA2000, and also supports some LTE bands unique to the US (Sprint & Verizon, mostly).
Unless noted otherwise by the dev, all the roms here are supported on both models.
Click to expand...
Click to collapse
So in other words, i want the XT1100 version of the device since im not in the us and Sprint nor Verizon is available here in Sweden.
Thanks! Great info
mattish.91 said:
So in other words, i want the XT1100 version of the device since im not in the us and Sprint nor Verizon is available here in Sweden.
Thanks! Great info
Click to expand...
Click to collapse
The 1103 US version has a different radio chip wich supports different LTE bands then the 1100 World (including EU) version.
Custom ROMs work on both models. No hardware changes (SD805 and 3GB RAM on both).
Only the radio hardware is different.
The XT1103 supports CDMA from the stone-age, don't know why the americans (VZW/Sprint) haven't moved on yet.
The XT1100 supports the required LTE bands to be used in Sweden. Most likely the common EU Bands (Band 3/Band 7/Band 20).
The XT1103 supports 3 and 7, but not 20 which is the main LTE band in European countries.

Does US Unlocked Phones (Galaxy S8 and Note 8) Support 4G TDD LTE Bands?

I am interested in buying US version (Snapdragon) of factory unlocked Note 8. However, it's full specs on network/radio bands are not listed yet even on Samsung official site.
I looked in full specs for Galaxy S8 unlocked (SM-G950UZKAXAA) vs carrier version such as Galaxy S8 for T-mobile (SM-G950UZKATMB), and noticed that carrier versions all listed support for 4G TDD LTE: B38(2600),B39(1900),B40(2300),B41(2500), while unlocked version does not. As the screenshots show.
So will Note 8 unlocked (Snapdradon) also be missing the 4G TDD LTE bands (B38, B39, B40, B41)?
Or maybe the specs listed on Samsung official site are not accurate and unlocked also supports those bands? Wishful thinking.
4G TDD LTE is used in some countries like China. So anyone with unlocked S8 on tmobile traveled to China can confirm if 4G data worked in China with t-mobile SIM?
If the unlocked phone only has the benefit to switch carriers in US but has limited band support internationally, then I will have to think twice.
Yeah I was trying to figure this out as well. So far, from other sites, I have seen mix messages. One site FrequencyCheck.com states that it does have those bands and other show them is missing...not sure which one is correct. Also, for other sites I have seen that the T-Mobile version also has 3G TD-SCDMA: B34(2010), B39(1880) and the unlocked version has 3G CDMA: 800/1900. I really can not make heads or tails of this information....is it correct, who is wrong??? I called Samsung that they don't have the information yet, so I don't know either way. I'm leaning to go with the Unlocked by Samsung version, but I am in the same boat with regards to this matter.
Looks like it, i have a Unlocked verdion of the phone.
Sent from my SM-N950U1 using Tapatalk

Question Want to buy Snapdragon 888 variant in Australia, will 5G work?

Australia only sells Exyos variant. But I prefer Snapdragon 888. There are some stores like Amazon, Kogan that sells this.
However, I have seen people saying some 5G bands are not supported. I have been googled for a while still cannot figure out what are not supported.
Based on this website: https://whirlpool.net.au/wiki/mobile_phone_frequencies Australia has those bands.
5G bands
3500MHz (n78) – Telstra (from May 2019)
3500MHz (n78) – Optus (from October 2019)
3500MHz (n78) – Vodafone (from March 2020)
2300MHZ (n40) – Optus (from June 2020)
700MHz (n28) – Vodafone (from November 2020)
850MHz (n5) – Telstra (from April 2020)
But I don't know where to find out if snapdragon 888 supports those bands? Are all SD variants supported 5G bands are the same, or different from different countries?
zeroarst said:
Australia only sells Exyos variant. But I prefer Snapdragon 888. There are some stores like Amazon, Kogan that sell this.
However, I have seen people saying some 5G bands are not supported. I have been googled for a while still cannot figure out what are not supported.
Based on this website: https://whirlpool.net.au/wiki/mobile_phone_frequencies Australia has those bands.
5G bands
3500MHz (n78) – Telstra (from May 2019)
3500MHz (n78) – Optus (from October 2019)
3500MHz (n78) – Vodafone (from March 2020)
2300MHZ (n40) – Optus (from June 2020)
700MHz (n28) – Vodafone (from November 2020)
850MHz (n5) – Telstra (from April 2020)
But I don't know where to find out if snapdragon 888 supports those bands? Are all SD variants supported 5G bands are the same, or different from different countries?
Click to expand...
Click to collapse
I bought the G9980 Hong Kong snapdragon 512/16 from bestmobilephone.com.au for $400 less than local model - I believe it's even cheaper now. Arrived in 3 business days. I have Optus. 5G and 4G+ works well no issues at all with the phone here in Aus. Even though the differences are meant to be small I couldn't buy the local exynos version knowing it was inferior to the SD.
adamlee2012 said:
Battery life is amazing exynos. Performance also amazing. Battery was topped up 12% so technically I'm at 18% not 30% in the screenshot.
Click to expand...
Click to collapse
Did you mean exynos is good?
5G is not well built in any country, it is still very limited and also not all bands are released to the public. The Hong Kong version may support one of the bands, but not all. I can't see any benefit right now in countries with less population like Australia. I live in Sweden and our 4G network is very well built, the coverage is great and capacity + coverage is amazing so i don't see any win with 5G that's why i am going to import a Snapdragon model from HK (Wonda Mobile).

Question Can SM-G9980 (HK dual sim) be hacked to get 5G in US?

Does anyone know? It's a physical dual sim, but it is a snapdragon, exactly the same as the US versions. The US bands in 5G are not enabled on this particular model. Can it be hacked to have US 5G enabled? I have read about switching on dormant bands on the US models to get 5G in Europe. Is it possible to do the same, but the other way around, for this non US model to get 5G in the US?
It's not the sane device in hardware or firmware although there are similarities. According to a few users 5G works in some regions, Australia and Europe but I haven't heard this from any US users. Can someone root the device to enable 5G on US Service Provider's? Maybe but I would think it's a challenging endeavor for anyone but the most hardcore tech gurus.
ekerbuddyeker said:
Does anyone know? It's a physical dual sim, but it is a snapdragon, exactly the same as the US versions. The US bands in 5G are not enabled on this particular model. Can it be hacked to have US 5G enabled? I have read about switching on dormant bands on the US models to get 5G in Europe. Is it possible to do the same, but the other way around, for this non US model to get 5G in the US?
Click to expand...
Click to collapse
Only 5G sub6 bands are available in HK variant - 1, 3, 28, 41, 78 and 79. Is your network using any of these?

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