Develop Bugs

[Q] Stupid question EU on US

Hi all,
I've bought a EU M8 mobile...I think it's EU as I bought in Dubai.
Sooner I will relocate in US and I've just realised that my mobile potentially could not work there ....is this true?
How can I check?
Thank you in advance for your help.

If it's eu, it'll work fine but I don't think you'll get LTE. I may be wrong. But it'll work

As stated it'll work fine, I know from experience! (Not re-location but hey). I'm not sure about 4G/LTE though.

Thank you and sorry for the delay.
I can't understand why it should not work 4G/LTE.
Are you saying that HTC makes two different model with different frequencies/bands??!?
my phone is actually completely unlock and not branded. if i buy a new US sim cards why do you think that 4G/LTE wont work?

E.Bonobox said:
Thank you and sorry for the delay.
I can't understand why it should not work 4G/LTE.
Are you saying that HTC makes two different model with different frequencies/bands??!?
my phone is actually completely unlock and not branded. if i buy a new US sim cards why do you think that 4G/LTE wont work?
Click to expand...
Click to collapse
HTC does make two different models(GSM & CDMA). I don't think the frequency/bands on the GSM phone you have will matter much. As I understand it the Qualcomm RF360 Front End solution chip has 40+ bands on the chip exactly for this reason. It makes it more "Global", it should already be capable of receiving 4G/LTE on most frequency/bands available in pretty much any country.
I think the only thing that perhaps influences it is carrier specific requests to lock to certain bands... Probably for roaming purposes and to get more money. But a carrier free device like you have shouldn't have a problem to work(Even LTE) in the US if you insert a local SIM card for it.
But that's just how I understand it from a quick look up I did some time ago, can't know all the details though. You could probably read up more on it for yourself if you're interested.
Qualcomm RF360 front end solution

thank you BerndM14!!
you clearly explain what was in my mind.
i can understand if some locked/carrier phone could have some problem but i would be surprised to discover that a brand new mobile such this will have issue to work overthere.
i'm searching the web as well but it's quite difficult to find clear answer.
i'm just wondering if in case there is some "lock" if those are bypassable flashing a different radio rom

sorry for my bad English
maybe I m wrong (but that is what I have to say as Vodafone Germany employee to my customers)
the One M8 will work fine with US LTE bands cause the EU and the US M8 are technically the same.
that's also the reason why it´s works not with any European LTE network outside Germany

Dual SIM Technology and how it works on the 7T

I'm having trouble finding out what type of dual SIM technology the 7T uses. Is it DSFA of DSDS? Will either one allow me to take a call from two different carriers at any time? FYI I'll be using Verizon and AT&T.

OP has always 'only' DSDS. So you can only make one call with one card at the same time.
The other card is disabled during this call.

Thank you for the info. If I am currently not on a phone call, the phone being idle, are both Sims able to receive a call at anytime?

yes, of course.

RobM87 said:
I'm having trouble finding out what type of dual SIM technology the 7T uses. Is it DSFA of DSDS? Will either one allow me to take a call from two different carriers at any time? FYI I'll be using Verizon and AT&T.
Click to expand...
Click to collapse
Dual SIM technology? I'm on the T-Mobile variant. I'm confused.
Sent from my [device_name] using XDA-Developers Legacy app

DSDS = Dual sim, dual standby, where you have two sims from two different carriers. When one SIM is active on a call the second goes idle. DSFA = Dual sim full standby, even if one sim is active on a call the other continues to function, although I am not certain of the mechanics of how a user handles two calls at once.
These are very popular with frequent international travelers, or when someone has a company phone and a personal phone but doesn't want to carry two devices. They really haven't caught on in the US because carriers for the most part have similar coverage and don't sell them. The carriers don't want their customers to be customers of other carriers too.
Imagine living in Belgium but frequently traveling to the UK and needing to use a mobile phone in both places. The roaming fees and long distance charges would be outrageous. With a dual sim phone a user could have a Belgium sim card and a UK sim card and be able to use the appropriate sim as needed without having to place the wear and tear on the phone doing sim swaps.
I have tried to find a dual sim phone which functions well in the US. I have a dual sim S9 from the UAE market, but for some reason the data is very slow compared to a single sim S9 for the US market. I also tried a Sonim XP8 which worked well enough until the phone figured out it was in the US and disabled the second sim slot. Apparently Sonim does not want the XP8 to function as a dual sim phone in the US.
T-Mobile has disabled the second sim card slot in the 7t, for whatever reason. I have a 7t coming from direct from the manufacturer and I am excited to see how well it works as a dual sim phone. I have a line on TMO and a line on AT&T, and I don't want to carry two devices if I don't have to.

rjglenn said:
DSDS = Dual sim, dual standby, where you have two sims from two different carriers. When one SIM is active on a call the second goes idle. DSFA = Dual sim full standby, even if one sim is active on a call the other continues to function, although I am not certain of the mechanics of how a user handles two calls at once.
These are very popular with frequent international travelers, or when someone has a company phone and a personal phone but doesn't want to carry two devices. They really haven't caught on in the US because carriers for the most part have similar coverage and don't sell them. The carriers don't want their customers to be customers of other carriers too.
Imagine living in Belgium but frequently traveling to the UK and needing to use a mobile phone in both places. The roaming fees and long distance charges would be outrageous. With a dual sim phone a user could have a Belgium sim card and a UK sim card and be able to use the appropriate sim as needed without having to place the wear and tear on the phone doing sim swaps.
I have tried to find a dual sim phone which functions well in the US. I have a dual sim S9 from the UAE market, but for some reason the data is very slow compared to a single sim S9 for the US market. I also tried a Sonim XP8 which worked well enough until the phone figured out it was in the US and disabled the second sim slot. Apparently Sonim does not want the XP8 to function as a dual sim phone in the US.
T-Mobile has disabled the second sim card slot in the 7t, for whatever reason. I have a 7t coming from direct from the manufacturer and I am excited to see how well it works as a dual sim phone. I have a line on TMO and a line on AT&T, and I don't want to carry two devices if I don't have to.
Click to expand...
Click to collapse
I had no idea. So if I but a dual SIM card tray and flash the international version software on my T-Mobile variant I should be able to have dual SIM functionality?
Sent from my [device_name] using XDA-Developers Legacy app

OuncE718 said:
I had no idea. So if I but a dual SIM card tray and flash the international version software on my T-Mobile variant I should be able to have dual SIM functionality?
Sent from my [device_name] using XDA-Developers Legacy app
Click to expand...
Click to collapse
This has been done on other model phones and should be the same with this one. It was the same price point for me so I just cut TMO out of the deal. Just be careful flashing other firmware, if you are a TMO customer you wouldn't want to loose Band 71.

SM-N9750/DS and SM-N9760/DS questions. (incomplete search information)

Hello,
I have done the searching hear and it seems that there is incomplete information at best.
I need a dual sim as I carry a work phone and a personal phone.
I don't want to lose my number so I want to get a minimal plan to receive calls and texts and work number must be ATT.
Currently, I am on Verizon. My understanding is that Verizon is going GSM so will it work in these two variants? Not that it matters, just wondering. Have no problem switching.
If I get these variants am I going to have to always use work around to get google services?
Is google assistant working or not?
Is Samsung and/or Google pay going to be dead?
Is my assertion that paying for the 9760 variant would be of no advantage to the 9750 as 5g will never work with the 9760?
Are these phones ACTIVE dual sim meaning I have two running numbers ACTIVE at all times. No switching.
Are there adapters that anyone knows of that I can covert my current Note 10+ US unlocked to ACTIVE dual sim?
Will I suffer much in Orlando with the missing bands?
I appreciate anyone's experience using these phones in the US market and thoughts/opinions on if it is worth it to switch or just explore Samsung alternatives.
Regards

Hey,
Here you can find some info https://forum.xda-developers.com/galaxy-note-10+/how-to/talk-chinese-version-note10-5g-t3991335/page5
---------- Post added at 04:33 PM ---------- Previous post was at 04:21 PM ----------
jackler1 said:
Hello,
I have done the searching hear and it seems that there is incomplete information at best.
I need a dual sim as I carry a work phone and a personal phone.
I don't want to lose my number so I want to get a minimal plan to receive calls and texts and work number must be ATT.
Currently, I am on Verizon. My understanding is that Verizon is going GSM so will it work in these two variants? Not that it matters, just wondering. Have no problem switching.
If I get these variants am I going to have to always use work around to get google services?
Is google assistant working or not?
Is Samsung and/or Google pay going to be dead?
Is my assertion that paying for the 9760 variant would be of no advantage to the 9750 as 5g will never work with the 9760?
Are these phones ACTIVE dual sim meaning I have two running numbers ACTIVE at all times. No switching.
Are there adapters that anyone knows of that I can covert my current Note 10+ US unlocked to ACTIVE dual sim?
Will I suffer much in Orlando with the missing bands?
I appreciate anyone's experience using these phones in the US market and thoughts/opinions on if it is worth it to switch or just explore Samsung alternatives.
Regards
Click to expand...
Click to collapse
Both 9750 and 9760 are Dual SIM, 9750 is 4G and 9760 is 5G.
I'm not sure how it works with US service providers, however you can check here for the bands they support :
https://www.samsung.com/cn/smartphones/galaxy-note10/specs/ (N9760, don't forget to select Note10+ 5G)
https://www.samsung.com/hk_en/smartphones/galaxy-note10/specs/ (N9750)
On 9750, all the Google apps are pre-installed. On 9760, GMS framework is pre-installed but you need to manually install the apps, and I didn't manage to make Google location history work.
On 9750, maybe you can try Samsung Pay, but on 9760 it won't work.
Don't know if 9760 will work with 5G in the US, however in Europe it's fine. 9760 does not have mm Wave
For Dual SIM, there is an option called as "Dual SIM always on" that says : "Receive calls from both SIM cards. Some limitations may apply", maybe that's what you want.

9750 user here. Google Services is preloaded and working. Phone runs Dual Sim Dual Standby meaning both phone numbers can be reached at all times unless one of the sim is in-call. The option dual sim always on allows you set up call forwarding to the sim that's taking a call so that you can take the phone call from the other sim if needed. For data, only one sim card will be active, you will need to switch sim to use data on another sim. The main catch is that the phone is not compatible with LTE advanced in the US, so you might experience slower speed compared to the US Note10+

My phone N9750 csc BRI (taiwan) . All good

S20 (0 - Hong Kong variant or F/DS - Dual SIM international) in Canada

Hi,
Does anyone have the 0 or F/DS variant in Canada and do any of the following features work for you? If they do or don't please also post your carrier (I'm on Telus).
- WiFi Calling
- LTE-A
- VoLTE
- e-SIM
Looking at getting the Hong Kong variant since e-SIM isn't even a working function in Canada or the USA for that matter when the iPhone and other phones get it. Every year I push myself closer and closer to just getting an iPhone. Boot loader completely locked down, check. Can't root, check. VoLTE doesn't work unless it's a carrier phone, check. No e-SIM, check. Like what's the point of an Android anymore? All the above features work on an iPhone no matter what carrier (or country for that matter) you bought it from. Samsung is a mush of CSC files, hardware variants, LTE bands...
Thanks,

@Class said:
Hi,
Does anyone have the 0 or F/DS variant in Canada and do any of the following features work for you? If they do or don't please also post your carrier (I'm on Telus).
- WiFi Calling
- LTE-A
- VoLTE
- e-SIM
Looking at getting the Hong Kong variant since e-SIM isn't even a working function in Canada or the USA for that matter when the iPhone and other phones get it. Every year I push myself closer and closer to just getting an iPhone. Boot loader completely locked down, check. Can't root, check. VoLTE doesn't work unless it's a carrier phone, check. No e-SIM, check. Like what's the point of an Android anymore? All the above features work on an iPhone no matter what carrier (or country for that matter) you bought it from. Samsung is a mush of CSC files, hardware variants, LTE bands...
Thanks,
Click to expand...
Click to collapse
No such thing as a perfect device, likely never will be. Best option is to list feature priorities then decide. i have the Hong Kong variant on T-mobile USA. Dual SIM which eliminates the need for an eSIM, bootloader is unlocked, can root the device. WiFi Calling and VoLTE function but no Carrier Aggeration (LTE-A). I wouldn't consider the F/DS variant, it has the Exynos SoC. Not an iPhone fan either, not impressed with their devices or ecosystem.

Thanks for the reply, its nice to see at least VoLTE and WiFi calling work (at least on T-Mobile in the USA). Anyone here on Telus? LTE-A isn't a priority considering a single band is typically fast enough for me these days, if I'm on a lower band it's for a reason (like distance). Does your dual SIM phone still support e-SIM? It's nice just to scan a plan and get going verses hunting the airport / local stores for a SIM.
Priority for me goes:
1) WiFi Calling
2) VoLTE
3) e-SIM
4) LTE-A

@Class said:
Thanks for the reply, its nice to see at least VoLTE and WiFi calling work (at least on T-Mobile in the USA). Anyone here on Telus? LTE-A isn't a priority considering a single band is typically fast enough for me these days, if I'm on a lower band it's for a reason (like distance). Does your dual SIM phone still support e-SIM? It's nice just to scan a plan and get going verses hunting the airport / local stores for a SIM.
Priority for me goes:
1) WiFi Calling
2) VoLTE
3) e-SIM
4) LTE-A
Click to expand...
Click to collapse
eSIM isn't available unless you aquire an International Variant with the Exynos SoC. I'm not aware of any Dual SIM devices which support eSIM. IMHO you have to really want the eSIM to sacrifice a device with a vastly inferior Exynos SoC.

varcor said:
eSIM isn't available unless you aquire an International Variant with the Exynos SoC. I'm not aware of any Dual SIM devices which support eSIM. IMHO you have to really want the eSIM to sacrifice a device with a vastly inferior Exynos SoC.
Click to expand...
Click to collapse
No no, dual SIM would be best in that case. Anyone in Canada can comment on the above?

Does Wifi-Calling work on both SIMs or SIM/eSIM on the S2, if they are from a different region?
Both my providers allow Wifi-Calling abroad.
Can anybody please confirm?

I have a Telus S20+ only support VoLTE, no WIFI-Calling. The reason I get this phone because of esim such a big disappointment.

I have Hongkong variant s20 5G (sm-g9810) using in Sri Lanka.
The phone supports physical dual SIM , dual 5G, VoLTE , VolWIFI.
Only disappointment with Hongkong variant is the lack of e-sim support and Call recording feature.

Question Le2125 dual sim

Like title says, can I put a dual sim tray in my 9 pro north american LE2125 to get dual sim?

as far as i know, only the telekom model (le2127) is not a dual sim device

jamescable said:
Like title says, can I put a dual sim tray in my 9 pro north american LE2125 to get dual sim?
Click to expand...
Click to collapse
Hi, I have an dual sim card tray in my unlocked NA model, the same model you are referring to. i bought it (dual sim tray)off of Amazon from a link someone posted quite a while back when android 12 was first coming out. There was a thread here with the info at the time. I haven't ever got to use the other sim because at the time they had a few uncertainties. I'm still on a android 11 based custom ROM.

jamescable said:
Like title says, can I put a dual sim tray in my 9 pro north american LE2125 to get dual sim?
Click to expand...
Click to collapse
But its already dual

Mr Hassan said:
But its already dual
Click to expand...
Click to collapse
It is? Strange, my sim tray is only a single sim, my ROMs only show 1 sim number. And yes, my phone model IS LE2125 and not the T-Mobile version. I have used the LE2125 msm numerous times and global OOS and never had issues with modem/base bands and stuff so my model is the north american global unlocked

jamescable said:
It is? Strange, my sim tray is only a single sim, my ROMs only show 1 sim number. And yes, my phone model IS LE2125 and not the T-Mobile version. I have used the LE2125 msm numerous times and global OOS and never had issues with modem/base bands and stuff so my model is the north american global unlocked
Click to expand...
Click to collapse
is your device perhaps a telecom device (telecom devices are only single sim) which has been flashed to a global device?

ChrisFeiveel84 said:
is your device perhaps a telecom device (telecom devices are only single sim) which has been flashed to a global device?
Click to expand...
Click to collapse
No, even if it WAS flashed to global, I would have to use the T-Mobile msm, which I don't need or use. Also, don't have radio issues using custom ROMs like T-Mobile users have.

ChrisFeiveel84 said:
as far as i know, only the telekom model (le2127) is not a dual sim device
Click to expand...
Click to collapse
No, LE2115 and LE2125 are both single SIM. In fact the T-Mobile LE2127 is a dual SIM device, one of the reasons people were buying it, but it's totally unstable, as it ships with a single SIM tray and the second is disabled.

I received a couple days ago from Amazon my order for OnePlus 9 Pro 5G LE2123 Dual SIM 12GB+256GB EU/UK Model Global ROM Factory Unlocked International Version. After setting it up and done migrating all my files from my OnePlus 8 Pro Model IN 2025 Dual Sim, I am surprised to see that the item I received is the Model LE2125 which is confirmed Dual Sim.
My previous research all said that Model LE2125 is only Single SIM, but here is my newly delivered Model LE2125 and it is indeed Dual SIM and both SIM cards are confirmed working. Can anyone enlighten or confirm that LE2125 is actually not Single SIM?
My primary TMobile card on Sim 1 is working fine and picking up 5G, while my secondary international roaming card on Sim 2 is also working.
Your feedback and input will be appreciated. Thank you much.

badfinger said:
I received a couple days ago from Amazon my order for OnePlus 9 Pro 5G LE2123 Dual SIM 12GB+256GB EU/UK Model Global ROM Factory Unlocked International Version. After setting it up and done migrating all my files from my OnePlus 8 Pro Model IN 2025 Dual Sim, I am surprised to see that the item I received is the Model LE2125 which is confirmed Dual Sim.
My previous research all said that Model LE2125 is only Single SIM, but here is my newly delivered Model LE2125 and it is indeed Dual SIM and both SIM cards are confirmed working. Can anyone enlighten or confirm that LE2125 is actually not Single SIM?
My primary TMobile card on Sim 1 is working fine and picking up 5G, while my secondary international roaming card on Sim 2 is also working.
Your feedback and input will be appreciated. Thank you much.
Click to expand...
Click to collapse
So, LE2125 is single sim ONLY. I know because I bought a dual sim tray and put 2 active T-Mobile sims in it and only 1 showed up.

But mine is LE2125 and I was surprised to see that it is in fact DUAL SIM, with dual sim tray and both sim cards are working (I put in my primary US T-Mobile sim in tray 1 and my international roaming sim card in tray 2). I bought the device from Amazon Marketplace used or refurbished.
Please see the 3 screenshots I posted showing the ModeLE2125 with 2 Sims and 2 IMEIs in device settings.

badfinger said:
But mine is LE2125 and I was surprised to see that it is in fact DUAL SIM, with dual sim tray and both sim cards are working (I put in my primary US T-Mobile sim in tray 1 and my international roaming sim card in tray 2). I bought the device from Amazon Marketplace used or refurbished.
Please see the 3 screenshots I posted showing the ModeLE2125 with 2 Sims and 2 IMEIs in device settings.
Click to expand...
Click to collapse
I think your software may be LE2125 but its either T-Mobile hardware or EU hardware.

Thank you for your kind observation. But all I can say is that this LE2125 is DUAL SIM with dual sim tray with 2 sim cards working (even my international roaming sim card on sim 2 receives my multiple test sms mesages sent from my US Tmobile number). So, as a hardware this LE2125 is working fine. As far as its sotware is concerned, it's already beyond me how it got into the device.
Thank you anyway for your input.

badfinger said:
Thank you for your kind observation. But all I can say is that this LE2125 is DUAL SIM with dual sim tray with 2 sim cards working (even my international roaming sim card on sim 2 receives my multiple test sms mesages sent from my US Tmobile number). So, as a hardware this LE2125 is working fine. As far as its hardware is concerned, it's already beyond me how it got into the device.
Thank you anyway for your input.
Click to expand...
Click to collapse
What I am meaning is, you phone might actually be LE2123 or LE2127 with north American OOS showing LE2125. Software is not hardware specific. Some ROMs will change your model number

Thank you so much for this info, that software is not hardware specific. This info is very new to me as I thought all along that frequency bands on a device is dictated by the physical hardware itself and not assigned via mere software configuration.

badfinger said:
Thank you so much for this info, that software is not hardware specific. This info is very new to me as I thought all along that frequency bands on a device is dictated by the physical hardware itself and not assigned via mere software configuration.
Click to expand...
Click to collapse
It's not the bands that are being spoken of, it's the hardware model shown in the settings. If you have a full conversion device, it's possible to convert from, say, LE2127 T-Mobile to show LE2125 US unlocked instead.
This is likely what happened because T-Mobile devices sell for cheap because nobody wants to deal with the headaches from them.

Thank you for this valuable information. I thought specific device models made for let's say, Europe, China, US have the radio hardware baked in with specific 5G or 4G LTE bands that work in specific regional markets.

badfinger said:
Thank you for this valuable information. I thought specific device models made for let's say, Europe, China, US have the radio hardware baked in with specific 5G or 4G LTE bands that work in specific regional markets.
Click to expand...
Click to collapse
They DO have this. Changing your model number with software won't change the bands that are supported, it just can change the model number (which is incredibly stupid as it makes it easy for people to sell a phone as something that it's not).

Wow, thank you again. Yes, it looks like it borders on deceitful practice although it is not illegal.

if u wanna be absolutely sure which model u're getting, check the IMEI number against online database.
it will show u exact model.
https://swappa.com/imei
I have LE2125, & i can confirm that it's a single sim device.
though i always if there's any way to make dual sim work in this model.