Dual sim support for Galaxy s21 SM-G991N (Korea) - Samsung Galaxy S21 Questions

Can someone please confirm if Galaxy S21 SM-G991N (Korea version) support dual sim via an esim option.
Reason being , i can get a used s21 for very cheap compared to other models but dual sim is really necessary for me...

I think it comes with singal sim and dual sim both versions. If you can get Dual SIM phone, it should be supported eSIM.

I have not come across any korean model stated as dual sim . But , i've read several articles saying s21 got esim enabled after Android 12 update. I myself am using an S21 ultra (Us version) which got dual sim enabled after android 12 update.
That's the reason i just wanted to confirm if the korean version also support dual sim after the android 12 udpate.

I also want to know it

I got the s21 korean version 2 days ago. It doesn't seem to support an esim. Please do you know if there are Korean versions that do?
Also mine is on android 13

Related

S9+ Duos and Exynos - Dual Sim Dual VoLTE?

Is Galaxy S9+ Duos with Exynos SoC Dual Sim Dual VoLTE or 2nd Sim Card is 2G/3G only?
So, you will want to use two different SIMs and speak use VoLTE for both?
I think it's possible. I have never thought of it this way, but it should work (although I do not have any evidence to back it up)
Looks like SIM2 won't do LTE at all according to phonemore http://www.phonemore.com/samsung-galaxy-s9-plus-sm-g965fds/specs/3886
2G network SIM2: GSM 850/900/1800/1900
3G network SIM2: Not supported
4G network SIM2: Not supported
Data network SIM2: GPRS, EDGE
Click to expand...
Click to collapse
Sorry, but Phonemore specs are completely unbelievable. It's simply bullsh...
Galaxy S7 Edge, Galaxy S8+ Duos and Note 8 Duos (all with Exynos) have 2nd SIM 2G/3G capable. Why could S9+ have only 2G network on 2nd SIM, if older models have 2G/3G?
Galaxy S9+ Duos with Snapdragon SoC supports 4G and VoLTE on both simcards simultaneously. Is it the same with Exynos version?
jano7878 said:
Sorry, but Phonemore specs are completely unbelievable. It's simply bullsh...
Galaxy S7 Edge, Galaxy S8+ Duos and Note 8 Duos (all with Exynos) have 2nd SIM 2G/3G capable. Why could S9+ have only 2G network on 2nd SIM, if older models have 2G/3G?
Galaxy S9+ Duos with Snapdragon SoC supports 4G and VoLTE on both simcards simultaneously. Is it the same with Exynos version?
Click to expand...
Click to collapse
Unfortunately non of this devices you mention supports 3G. You have to switch in settings in order to have suport 3G,4G for sim 2 and vice versa.
S8 Exynos (G950FD) supported VOLTE on both SIM but not simultaneously; the other SIM would no longer remain in VOLTE network mode if you selected that mode for one SIM.
It's a shame that below $100 xiaomi phones now support VOLTE simultaneously on both SIM but Samsung doesn't. I hope S9 series does.
madnav said:
S8 Exynos (G950FD) supported VOLTE on both SIM but not simultaneously; the other SIM would no longer remain in VOLTE network mode if you selected that mode for one SIM.
It's a shame that below $100 xiaomi phones now support VOLTE simultaneously on both SIM but Samsung doesn't. I hope S9 series does.
Click to expand...
Click to collapse
If you find out that it does will you let me know please. Currently sitting on the Mate 10 Pro which does Dual VOLTE and Dual SIM 4G, if the S9 can do this too then I'll definitely upgrade!
Crombi said:
If you find out that it does will you let me know please. Currently sitting on the Mate 10 Pro which does Dual VOLTE and Dual SIM 4G, if the S9 can do this too then I'll definitely upgrade!
Click to expand...
Click to collapse
Well, my pre-order is expected to be delivered by 17th March; I can test and let you know by then.
Will voLTE be enabled by default on unlocked phones? Or will I have to buy an operator modified ROM to have the option to use the VoLTE or Wifi calling services?
Thanks
Its Hybrid Dual-Standby config so unfortunately only 1 sim can be primary at 4G/VoLTE and other can be only 3G/2G at that time.
Yea, I've just got my S9+ Exynos and I can confirm: when 1st SIM card is connected to LTE/VoLTE service, the second SIM card is connected to 3G network
No Dual Sim Dual VoLTE.
Shame on you, Samsung. Half year old Huawei Mate 10 Pro is better choice.
jano7878 said:
Yea, I've just got my S9+ Exynos and I can confirm: when 1st SIM card is connected to LTE/VoLTE service, the second SIM card is connected to 3G network
No Dual Sim Dual VoLTE.
Shame on you, Samsung. Half year old Huawei Mate 10 Pro is better choice.
Click to expand...
Click to collapse
:good: Confirmed in Exynos : Only 1 SIM at a time for VOLTE while the other on 2G/3G . You can use either one of the Slots for VoLTE
jano7878 said:
Yea, I've just got my S9+ Exynos and I can confirm: when 1st SIM card is connected to LTE/VoLTE service, the second SIM card is connected to 3G network
No Dual Sim Dual VoLTE.
Shame on you, Samsung. Half year old Huawei Mate 10 Pro is better choice.
Click to expand...
Click to collapse
Now we need to wait and see if the Snapdragon version can do it.
Another question, if you disable LTE on SIM 1, can SIM 2 then connect to LTE. Or do you have to swap the SIM cards over?
Crombi said:
Now we need to wait and see if the Snapdragon version can do it.
Another question, if you disable LTE on SIM 1, can SIM 2 then connect to LTE. Or do you have to swap the SIM cards over?
Click to expand...
Click to collapse
US Snapdragon variant is a single SIM model
madnav said:
US Snapdragon variant is a single SIM model
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Click to collapse
I thought there was going to be a Dual SIM Snapdragon too?
Just easy though - *#*#4636#*#* For switching your SIM on data to preferred band @esvlc @madnav @overgonas @jano7878 @Fenny @RossTeagan
v-b-n said:
1 sim can be primary at 4G/VoLTE and other can be only 3G/2G at that time.
Click to expand...
Click to collapse
I second that.
I just received my S9+ (via renewal of my mobile contract) and received a dual sim one (check by inserting two sim cards, it does ask for both pins and let's me choose the sim card to use for calling), although it was never advertised as such.
However, it only shows LTE for the first one.
Considering that the dual-sim version is marketed as specific "Duos" devices, those might differ - but I wouldn't bet on it.
FrozenLord said:
I second that.
I just received my S9+ (via renewal of my mobile contract) and received a dual sim one (check by inserting two sim cards, it does ask for both pins and let's me choose the sim card to use for calling), although it was never advertised as such.
However, it only shows LTE for the first one.
Considering that the dual-sim version is marketed as specific "Duos" devices, those might differ - but I wouldn't bet on it.
Click to expand...
Click to collapse
Can you chose which SIM accesses the LTE or is it only the Sim in slot 1 that can?
Crombi said:
Another question, if you disable LTE on SIM 1, can SIM 2 then connect to LTE. Or do you have to swap the SIM cards over?
Click to expand...
Click to collapse
S8 already can do this. Don't think it's exception on s9
---------- Post added at 03:38 AM ---------- Previous post was at 03:36 AM ----------
Crombi said:
I thought there was going to be a Dual SIM Snapdragon too?
Click to expand...
Click to collapse
China and Hong Kong S9 will be dual SIM SD variant.
kartrikpal said:
Just easy though - *#*#4636#*#* For switching your SIM on data to preferred band @esvlc @madnav @overgonas @jano7878 @Fenny @RossTeagan
Click to expand...
Click to collapse
You can do that within settings itself.
Problem is not with switching Band of Data SIM; but having both SIM work at LTE simultaneously.

What's the difference between the S9+ Dual (Duos) vs S9+ ?

Well title says it all.. Duos model is almost 100 euros cheaper so are there any differences with S9+?
Are they only rom related or do they have differences in h/w as well? And why is it cheaper anyway?
Thanks in advance for your replies
orbitech said:
Well title says it all.. Duos model is almost 100 euros cheaper so are there any differences with S9+?
Are they only rom related or do they have differences in h/w as well? And why is it cheaper anyway?
Thanks in advance for your replies
Click to expand...
Click to collapse
One is dual sim, while the second isnt. Simple as that.
I believe duos is EX, and the non could potentially be SD.
I think it is:
1 sim = S9+
2 sims = S9+ Duos (also known as Hybrid but has Duos on the back of the device).
I might be wrong. I normally am according to the better half!
trickie69r said:
I think it is:
1 sim = S9+
2 sims = S9+ Duos (also known as Hybrid but has Duos on the back of the device).
I might be wrong. I normally am according to the better half!
Click to expand...
Click to collapse
i am also wondering with this duo version though mine is duos, i thought the hybrid sim is standard since years ago for flagship phones but seems with these 2 variant it isn't. i thought at first with this duos variant have 3 slots: 2 sim 1 mSD but seems its just another hybrid one *sigh*
The duos as long as it's the exynos version with the same product code (G965FD) will run any official G965F firmwarw fine. I got one from Hong Kong and flashed the UK three firmware and now I get volte and WiFi calling. It was over £200 cheaper than Samsung UK!!!
mikey_sk said:
The duos as long as it's the exynos version with the same product code (G965FD) will run any official G965F firmwarw fine. I got one from Hong Kong and flashed the UK three firmware and now I get volte and WiFi calling. It was over £200 cheaper than Samsung UK!!!
Click to expand...
Click to collapse
Thanks this is what I was looking for to hear. Not having the same firmware model as the world one would be a no go since f/w updates would be different.
mikey_sk said:
The duos as long as it's the exynos version with the same product code (G965FD) will run any official G965F firmwarw fine. I got one from Hong Kong and flashed the UK three firmware and now I get volte and WiFi calling. It was over £200 cheaper than Samsung UK!!!
Click to expand...
Click to collapse
Who did you buy from exactly?
orbitech said:
Well title says it all.. Duos model is almost 100 euros cheaper so are there any differences with S9+?
Are they only rom related or do they have differences in h/w as well? And why is it cheaper anyway?
Thanks in advance for your replies
Click to expand...
Click to collapse
S9/S9+ Duos is a Hybrid Dual SIM device based on Samsung Exynos 9810 platform.
S9/S9+ Regular (non-Duos) is a Single SIM + SD Slot device based on either Qualcomm Snapdragon 845 OR Samsung Exynos 9810 platform; it depends upon the model number.
I could find all model numbers here with a quick google search; I am not sure if this information is absolutely correct though.
Samsung Galaxy S9 & S9 Plus Model Number
I got duos.
Soo you want tell me, S9plus without 'duos' don't have hybrid dual sim?
ermacwins said:
Who did you buy from exactly?
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Click to collapse
From hong Kong when I was there
---------- Post added at 02:37 PM ---------- Previous post was at 02:32 PM ----------
Psimel14 said:
I got duos.
Soo you want tell me, S9plus without 'duos' don't have hybrid dual sim?
Click to expand...
Click to collapse
the duos has 2 imei numbers. I've heard speak that the non duos may well support dual sim but I am unsure. Someone can check and get back to us?
---------- Post added at 02:43 PM ---------- Previous post was at 02:37 PM ----------
---------- Post added at 02:50 PM ---------- Previous post was at 02:43 PM ----------
ermacwins said:
Who did you buy from exactly?
Click to expand...
Click to collapse
Also this site sells the 128gb version with free delivery. I've ordered from them before and they reliable albeit the tracking is never totally correct. Buy using PayPal for added security.
https://www.eglobalcentraluk.com/?g...UuKVuNu7MlRNuuUdwqNpLd-Wr8RoC9nwQAvD_BwE#/pro
Psimel14 said:
I got duos.
Soo you want tell me, S9plus without 'duos' don't have hybrid dual sim?
Click to expand...
Click to collapse
The 2nd slot (hybrid one) accepts only SD cards on non-duos models.
Samsung might not be using "Duos" branding in all market where it sells Dual SIM variants.
For eg. European dual SIM variants are branded Duos but Indian dual SIM variants are simply called "Samsung Galaxy S9 Dual SIM".
Sent from my SM-G965F using Tapatalk
For anyone who are interested the Hong Kong version is dual SIM only with Qualcomm CPU and the sim2 slot can be used as SD card slot
http://www.samsung.com/hk_en/smartphones/galaxy-s9/spec/
The model name and number are different and I have been using the S9+ 128gb version SM-G9650/DS
Hong Kong version is hybrid dual SIM with SD 845.
Other versions sold here are parallel imports.
bethedealer said:
Hong Kong version is hybrid dual SIM with SD 845.
Other versions sold here are parallel imports.
Click to expand...
Click to collapse
So use 2 sims or 1 sim and microsd card?
ermacwins said:
So use 2 sims or 1 sim and microsd card?
Click to expand...
Click to collapse
1st Sim slot - Sim
2nd Sim slot - Sim or SD card
bethedealer said:
1st Sim slot - Sim
2nd Sim slot - Sim or SD card
Click to expand...
Click to collapse
thank you for this info. I have been reading here
someone saying that "one has single sim has two sims. it is simple as that"
No it is not so simple.
He failed to provide this useful info YOU gave and which makes it a dealbreaker. Because i want to buy a dual sim which also has an sd card slot available
(non hybrid).
This changes all. I have put for sale my single sim s8 plus in order to buy a dual sim s9plus.
Now i will keep my s8plus and continuew using my good old s3 for my work phone.
madnav said:
S9/S9+ Duos is a Hybrid Dual SIM device based on Samsung Exynos 9810 platform.
S9/S9+ Regular (non-Duos) is a Single SIM + SD Slot device based on either Qualcomm Snapdragon 845 OR Samsung Exynos 9810 platform; it depends upon the model number.
I could find all model numbers here with a quick google search; I am not sure if this information is absolutely correct though.
Samsung Galaxy S9 & S9 Plus Model Number
Click to expand...
Click to collapse
Sorry to be that guy, but this is wrong.
I have a Duos s9+ running on a Snapdragon 845. (G9650/Argentina so Chinese Snapdragon, OEM Unlock and Root capable. YAY) It is, as you said, a hybrid tray, so will accept either two sims, or one sim and an SD card.
It has absolutely nothing to do with the processor.
for HK version , I think it has one difference, one's slot can support SD cards.

Huawei Y6 2019 - UK O2 Variant - Can it use dual sims?

I just bought a 2019 Y6 from O2 and had originally thought it was a dual sim edition just like almost every other 2019 Y6 for sale in the UK.
Turns out that the sim tray has the middle section blanked off.
What I'm wondering is, if anybody knows if the O2 variant is only different in the sense that they provide a sim tray suitable for only one sim card, or do you know if the phone is the same internally as the dual sim models?
(There are dual sim trays available on eBay)
Model info here:
https://www.o2.co.uk/shop/huawei/y6-2019

Esim?

Since the fold supports Esim, and it looks like the s11 / S20 line will support esim based on the rumours, just wondering if there is any definitive info yet on the lite supporting esim as a 2020 phone?
Anyone knows about that? If it support eSIM, perhaps we can have 2 sim (one phisical, one eSIM, and microsd..)
No, this phone doesn't have eSim support.

Is it possible to install stock S21 ROM on S21 AT&T (USA) version?

I am thinking of getting an S21 from AT&T because of the deal they have right now, but I don't like AT&T bloatware. I'm a noob when it comes to phone firmware and such, so I'm not sure what is or isn't possible.
My understanding is as follows:
Carrier unlock is possible via AT&T website to use other carrier SIM cards.
Bootloader unlock is not possible on AT&T devices (starting at V2 seemingly?).
I'm just not clear if you need an unlocked bootloader to flash the stock S21 ROM on an AT&T device. If not needed, what is the point of unlocking the bootloader, just for root?
Any clarity is appreciated.
You can use "patched ODIN" to do flash "U1" firmware, which removes bloatware.
Not sure about the bootloader, I think you're correct on that.
I flashed an Xfinity Mobile S21 (carrier unlocked by them) to U1 but so far the phone is refusing to use the proper carrier settings for VoWIFI (I have a VZW sim in it now). It worked for 1-2 weeks previously. Everything else seems to work properly including VoLTE.
I'll probably switch back to Xfnity Mobile to get VoWIFI working again.
Thanks for the response.
can I ask something related? I got my Samsung S21 from Amazon unlocked and I'm in International market. the phone has esim capability but it's locked up. my question is (can) I flash international firmware or let's say the one being sold in the middle east? I'm stuck with single sim which is pretty annoying. what do you guys recommend
mohawahba said:
can I ask something related? I got my Samsung S21 from Amazon unlocked and I'm in International market. the phone has esim capability but it's locked up. my question is (can) I flash international firmware or let's say the one being sold in the middle east? I'm stuck with single sim which is pretty annoying. what do
Click to expand...
Click to collapse
My understanding is that the international firmware is not compatible with the US phones because the US version uses the Qualcomm Snapdragon processor, whereas the international phones use the Exynos chip. I think you're stick with single SIM, unfortunately.
quadrun1 said:
My understanding is that the international firmware is not compatible with the US phones because the US version uses the Qualcomm Snapdragon processor, whereas the international phones use the Exynos chip. I think you're stick with single SIM, unfortunately.
Click to expand...
Click to collapse
the snapdragon version is only sold in the US solely?
"International and Korea models of the S21 utilize the Exynos system-on-chip, while the U.S., Canadian, Chinese, Taiwanese, Hong Kong and Japanese models utilize the Qualcomm Snapdragon 888."
Samsung Galaxy S21 - Wikipedia
en.wikipedia.org
quadrun1 said:
"International and Korea models of the S21 utilize the Exynos system-on-chip, while the U.S., Canadian, Chinese, Taiwanese, Hong Kong and Japanese models utilize the Qualcomm Snapdragon 888."
Samsung Galaxy S21 - Wikipedia
en.wikipedia.org
Click to expand...
Click to collapse
so flashing the HK to the US G991U1 model applicable? I need to activate eSIM to get dual sim working. also volte doesn't work for me at all.
Hello , can I ask a related question, I've an unlocked s21 5g with the Three carriers SM-G991B .. Can I install the global version ??

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