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

Unlocked US HTC 10 won't connect to 3G Band 900

Hi everyone. I recently purchased a HTC 10 from swappa, the unlocked version. The thing is, on gsmarena and HTC US page says that this model works on 850/900Mhz bands for UMTS (H/H+), but here in DR, i'm trying to use it with Orange Dominicana, who works on 900Mhz band for UMTS and the phone doesnt... It goes from LTE to 2G, and when on LTE i cant receive phone calls. I need to put it on 2G to receive calls, but the data sucks at those speeds.
Anyone knows a way that i can be sure if the phone really doesn't have this particular band (900Mhz) for UMTS? or a way to see if i can activate it if its available but inactive? I try 2 phones (a friend of mine bought one, same model) and is the exact same behavior on both.

See my signature about adding bands.
At least you can check if it is enabled and perhaps try to add it too

kakaroto said:
Hi everyone. I recently purchased a HTC 10 from swappa, the unlocked version. The thing is, on gsmarena and HTC US page says that this model works on 850/900Mhz bands for UMTS (H/H+), but here in DR, i'm trying to use it with Orange Dominicana, who works on 900Mhz band for UMTS and the phone doesnt... It goes from LTE to 2G, and when on LTE i cant receive phone calls. I need to put it on 2G to receive calls, but the data sucks at those speeds.
Anyone knows a way that i can be sure if the phone really doesn't have this particular band (900Mhz) for UMTS? or a way to see if i can activate it if its available but inactive? I try 2 phones (a friend of mine bought one, same model) and is the exact same behavior on both.
Click to expand...
Click to collapse
This is happening to me too! Exactly the same problem, were you able to solve this @kakaroto?

c_sar007 said:
This is happening to me too! Exactly the same problem, were you able to solve this @kakaroto?
Click to expand...
Click to collapse
Also interested

Have you tried anithing?
NickKG81 said:
Also interested
Click to expand...
Click to collapse
Have you tried anithing? I would like to have some ideas before doing anithing stupid.

c_sar007 said:
Have you tried anithing? I would like to have some ideas before doing anithing stupid.
Click to expand...
Click to collapse
I haven't tried adding bands yet. I'm interested since Viva is rolling out 4G service in the next few months. If my HTC 10 isn't compatible with their 4G or 3G (even though they said it will be), then I'll be looking at adding more bands.

stifilz said:
See my signature about adding bands.
At least you can check if it is enabled and perhaps try to add it too
Click to expand...
Click to collapse
Thanks for the sugestion. I did not follow your method since CDMA Tools is no longrer available in DEMO version and licences are really expensive (100+ Dollars) to just test. I followed the method suggested by @fffft (That can be found here) since it applyes to all Qualcomm devices using QPST and QXMD.
Long story short, I had to Root, set a custom recovery, a custom ROM and even a custom Kernel to try the method but It did not work to me. The irony of all of this is that technically I my HTC 10 has all bands available to be used. See the picture Attached.
@stifilz do you have any Ideas?

stifilz said:
See my signature about adding bands.
At least you can check if it is enabled and perhaps try to add it too
Click to expand...
Click to collapse
Thanks for the sugestion. I did not follow your method since CDMA Tools is no longrer available in DEMO version and licences are really expensive (100+ dollars) to just test. I followed the method suggested by @fffft (That can be found here) since it applyes to all Qualcomm devices using QPST and QXMD.
Long story short, I had to Root, set a custom recovery, a custom ROM and even a custom Kernel to try the method but It did not work to me. The irony of all of this is that technically I my HTC 10 has all bands available to be used. See the picture Attached.
@stifilz do you have any Ideas?

Getting VoLTE working for united states carriers on custom roms.

Before i explain what i/we all hope to achieve, ive been increasingly worried about network shutdowns. Ive seen at&t shut their 2G network down, I believe verizon is next with sprint or t-mobile to follow. For those who dont know without VoLTE, us verizon users use 1xRTT which is 2G voice. So, if verizon shuts the 2G network down, what do we do? So now that that speech is over.
Ive seen threads around on other phones and somehow the devs for these phones got VoLTE working on united states carriers. i dont know very much but i hope we all can use this thread to gather info and come up with ideas to get it working. I do know that the stock software has some sort of "sign" that in some way shape or form verifies the phone in some way.

The unlocked one supports many 4G VoLTE bands. If you want to know your carrier supports or not, ask your carrier customer support for VoLTE bands and cross check with below link.
http://www.htc.com/us/go/htc-10-unlocked/

satreddy said:
The unlocked one supports many 4G VoLTE bands. If you want to know your carrier supports or not, ask your carrier customer support for VoLTE bands and cross check with below link.
http://www.htc.com/us/go/htc-10-unlocked/
Click to expand...
Click to collapse
Useful info, but I believe our main issue with custom roms is some sort of signature that tells the carrier something, thats about all I know

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

Question AT&T and International/EU 9 Pro

So, I have been watching the 9 Pro as my next phone (upgrading from HTC U12+), but am really disappointed in a couple of things: (1) it appears there is no plan to certify the US version for AT&T 5G, and (2) no Astral Black for the US.
Since the 5G aspect is unlikely to change anytime soon, and AT&T 5G isn't really all that great anyway from what I hear, is there any downside to buying an EU Astral Black model and using it in the US? I'm still researching all the bands, but it appears the EU model is only missing two LTE bands in use by AT&T (Bands 29 and 30). To be fair, the US version is also missing Band 29 for the 700MHz spectrum, but does contain support for Band 30 at 2300MHz.
I'm going to log which bands are being used where I live and work but, if I will be limited to 4G/LTE anyway, I'm not seeing a downside to buying the EU version. Am I overlooking something? Any thoughts, suggestions, or input is greatly appreciated.

EU has additional options that neither the TMO or US int models have. At&t is behind on 5g deployments anyway so you shouldn't miss out on much, Verizon and TMO would've been better for that. As far as general reqs go, I don't see why not.

mawoods75 said:
So, I have been watching the 9 Pro as my next phone (upgrading from HTC U12+), but am really disappointed in a couple of things: (1) it appears there is no plan to certify the US version for AT&T 5G, and (2) no Astral Black for the US.
Since the 5G aspect is unlikely to change anytime soon, and AT&T 5G isn't really all that great anyway from what I hear, is there any downside to buying an EU Astral Black model and using it in the US? I'm still researching all the bands, but it appears the EU model is only missing two LTE bands in use by AT&T (Bands 29 and 30). To be fair, the US version is also missing Band 29 for the 700MHz spectrum, but does contain support for Band 30 at 2300MHz.
I'm going to log which bands are being used where I live and work but, if I will be limited to 4G/LTE anyway, I'm not seeing a downside to buying the EU version. Am I overlooking something? Any thoughts, suggestions, or input is greatly appreciated.
Click to expand...
Click to collapse
As far as I know, no models work with att 5g.

toolhas4degrees said:
As far as I know, no models work with att 5g.
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Click to collapse
I believe that is true - I just want to make sure I'm not inadvertently limiting myself with 4G/LTE coverage by buying the EU version. I don't really care around home/work, as there is usually wifi available. My bigger concern would be coverage in my home area that might get dropped now due to the EU version missing a band that is available on the US version. Or, perhaps when traveling if the EU version is missing bands that other networks (roaming) may use.

mawoods75 said:
I believe that is true - I just want to make sure I'm not inadvertently limiting myself with 4G/LTE coverage by buying the EU version. I don't really care around home/work, as there is usually wifi available. My bigger concern would be coverage in my home area that might get dropped now due to the EU version missing a band that is available on the US version. Or, perhaps when traveling if the EU version is missing bands that other networks (roaming) may use.
Click to expand...
Click to collapse
I have dual sims, straight talk att sim and t mobile sim. Att sim works fine no drop but no 5g, simple mobile -TMobile 5g,4g, I have the Chinese varient with eu firmware

toolhas4degrees said:
As far as I know, no models work with att 5g.
Click to expand...
Click to collapse
You are correct. I call ATT about once a week asking if they're going to certify/whitelist OnePlus devices. I figure the more complaints they get, the more they'll be inclined to investigate it.
To add to this, most people I speak to have never even heard of OnePlus, which makes the conversation troublesome. Be completely prepared for ATT employees to feed you bad information, say your device isn't compatible (does not have the required hardware), is inferior to Samsung/Motorola/iPhone, and try to sell you a new phone or sent you a new SIM card.
I've posted before about calling ATT. I feel everyone who has their service should call on a regular basis. Squeaky wheel gets the grease.

phr0zen said:
You are correct. I call ATT about once a week asking if they're going to certify/whitelist OnePlus devices. I figure the more complaints they get, the more they'll be inclined to investigate it.
To add to this, most people I speak to have never even heard of OnePlus, which makes the conversation troublesome. Be completely prepared for ATT employees to feed you bad information, say your device isn't compatible (does not have the required hardware), is inferior to Samsung/Motorola/iPhone, and try to sell you a new phone or sent you a new SIM card.
I've posted before about calling ATT. I feel everyone who has their service should call on a regular basis. Squeaky wheel gets the grease.
Click to expand...
Click to collapse
And the strange part is they have the 9 and 9 Pro listed on their list of devices that will still work on their network (VoLTE) after they shutdown their 3G service next year. Gives me hope they will certify at some point.

I run this phone on AT&T, and while I don't get 5G speeds, I get very fast LTE+ speeds of around 200mbps.

Thanks all for the input. After some more thought, I believe I have decided on the pine green US version. It's going to be in a case anyway, and I've had very few cases that aren't black. So, if it will be black anyway due to the case, I might as well get the US version. Plus, I think the black case and green camera bump will look sharp.

Reviving an old thread, rather starting anew:
I want to get the 9 pro for T-mobile use in US. I need dual sims and want custom roms...
I saw that "toolhas4degrees" said they had a Chinese model with EU firmware. I don't know if he changed the firmware himself or what... A bit out of my capabilities.
Simply put: What would I need to do (if anything) to get the EU (LE2123) OnePlus 9 Pro to work with T-mobile?
Thanks!