Volte - AT&T HTC One (M8)

I got an att m8
And I read that an update enabled volte I was wondering if volte is att only or will it work of a tmobile sim is used. It is unlocked

Ttt

PunishedSnake said:
I got an att m8
And I read that an update enabled volte I was wondering if volte is att only or will it work of a tmobile sim is used. It is unlocked
Click to expand...
Click to collapse
AT&T's deployment of VoLTE seems very unique, based on the havoc is cause for folks on non-ATT ROMs I'm skeptical that such an update would work on VoLTE on T-Mob. But I suppose the only way to know for sure would be to try.
My guess is that it would work on the T-Mob ROM (if they included the feature in the ROM).

redpoint73 said:
AT&T's deployment of VoLTE seems very unique, based on the havoc is cause for folks on non-ATT ROMs I'm skeptical that such an update would work on VoLTE on T-Mob. But I suppose the only way to know for sure would be to try.
My guess is that it would work on the T-Mob ROM (if they included the feature in the ROM).
Click to expand...
Click to collapse
On att stock rom it didn't work
I haven't tried on the tmobile rom with att firmware yet

PunishedSnake said:
On att stock rom it didn't work
I haven't tried on the tmobile rom with att firmware yet
Click to expand...
Click to collapse
I've been digging around on this too. According to articles I read, T-Mobile claimed as of Nov 11, 2015 that 1/3 of their calls were on VoLTE. The more I read the more I saw a mass movement that includes Apple to implement VoLTE. A quick google search with just "VoLTE" reveals plans all over the world and most major ISPs and phone manufacturers to implement.

Related

HTC Rezound Gsm

Does the rezound support proper us GSM, if so how, and what does it support (I have Tmobile, will it support 3g/4g)
Check out the htc Rezound development forum and look for two roms:
MIUI and Rezound maister. They are both built with gsm built-in, while other roms offer gsm functionality with a flashable zip.
Don't know the answer to your tmobile question but my understanding is that it does work in the USA.
And just FYI, the OS that comes with the Rezound does not support gsm, you have to be running a custom rom that supports it.
Sent from my Rezound using Tapatalk 2
ericerk said:
Does the rezound support proper us GSM, if so how, and what does it support (I have Tmobile, will it support 3g/4g)
Click to expand...
Click to collapse
brenuga said:
Check out the htc Rezound development forum and look for two roms:
MIUI and Rezound maister. They are both built with gsm built-in, while other roms offer gsm functionality with a flashable zip.
Don't know the answer to your tmobile question but my understanding is that it does work in the USA.
And just FYI, the OS that comes with the Rezound does not support gsm, you have to be running a custom rom that supports it.
Sent from my Rezound using Tapatalk 2
Click to expand...
Click to collapse
Yes The latest Stock Rom OTA update does support GSM natively, just use it in GSM/UMTS mode.
Here is the link to download it:
http://www.androidpolice.com/2012/0...ull-ruu-build-4-03-605-2-for-the-htc-rezound/
Lot of other custom roms also offer that.
But one issue i have seen in the stock rom is RF Calibration is need to get good network bars and specially 4G. I am not sure about whether this issue has been solved in custom roms or not.
NilayS said:
Yes The latest Stock Rom OTA update does support GSM natively, just use it in GSM/UMTS mode.
Here is the link to download it:
http://www.androidpolice.com/2012/0...ull-ruu-build-4-03-605-2-for-the-htc-rezound/
Lot of other custom roms also offer that.
But one issue i have seen in the stock rom is RF Calibration is need to get good network bars and specially 4G. I am not sure about whether this issue has been solved in custom roms or not.
Click to expand...
Click to collapse
Latest stock rom ota leak, not actually an official ota yet (at least I haven't seen anyone mention getting it).
There is a search button for a reason
AshtonTS said:
There is a search button for a reason
Click to expand...
Click to collapse
You felt the need to bump this just to tell him to use the search button, after the question has already been answered?
Hi
NilayS said:
Yes The latest Stock Rom OTA update does support GSM natively, just use it in GSM/UMTS mode.
Here is the link to download it:
Lot of other custom roms also offer that.
But one issue i have seen in the stock rom is RF Calibration is need to get good network bars and specially 4G. I am not sure about whether this issue has been solved in custom roms or not.
Click to expand...
Click to collapse
with last ruu work sms or mms??
my htc rezound said:
with last ruu work sms or mms??
Click to expand...
Click to collapse
how to fix "sim card source unknown" error?
javed91214 said:
how to fix "sim card source unknown" error?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1882355
ericerk said:
Does the rezound support proper us GSM, if so how, and what does it support (I have Tmobile, will it support 3g/4g)
Click to expand...
Click to collapse
3G may work after T-Mobile completes UMTS/HSPA 1900Mhz refarming. Supposedly by the end of the year.
You also need to modify radio configuration.
http://forum.xda-developers.com/showthread.php?t=1914122
ericerk said:
Does the rezound support proper us GSM, if so how, and what does it support (I have Tmobile, will it support 3g/4g)
Click to expand...
Click to collapse
Just to clarify, I was looking up the Rezound trying to think what the next HD2 style hackable phone might be. I found it supports AT&T's frequencies: GSM 850/1900 and AT&T's 3G/HSPA is on the 1900 band. T-Mobile can use GSM 850 and 1900, and their 3G/4G is on the 1700 band known as AWS. As the above post stated they've been reconfiguring their towers in some areas to also do 3G/4G on 1900 like AT&T. Maybe in those areas T-Mobile 3G/4G will just work? But this looks really appealing as a multi-band phone.

Can This Phone Do VoLTE?

curious to know?
svengalis said:
curious to know?
Click to expand...
Click to collapse
no it is not about phone .. it is about your operator ... ask them if they have launched it yet .. what i know no one operator has HD voice yet .. maybe in korea or japan .. advanced tech countries..
so simply if u can have 4g then it is up to your OP which has it launched or activated.. otherwise no..
am on 4g and obviously when i make call it jumps to 3g .. crappy canny sound about 64kbps or maybe less..
I am on Metro PCS which is now MetroPCS/TMobile -same Towers etc.
MetroPCS was I think first to feature VoLTE long before the Merger.
This means we were able to surf the Internet while on a call , even play Videos while on a call and staying on the LTE Bands.
Researching the purchase of my Alpha I talked and texted with TMobile personnel etc and checked for proper Bands BUT was never reminded that many phones do NOT have the software for VoLTE.
So my Alpha 850 M does NOT do VoLTE on Metro/Tmobile because it does NOT have Software for this- it may be added with Android Lollipop.
THIS is the problem with most non Carrier Phones on Metro/Tmobile-I assumed it was just good matching Bands and my Alpha has the LTE Bands for Tmo BUT a phone needs the Software to do VoLTE .
I am not a Dev so feel free to correct this if I am not correct BUT I was surprised when I make a call
on Alpha to see the LTE indicator drop to 3G as soon as I make a call and no simultaneous Internet
BUT when H+ kicks in, sometimes very fast sometimes not I can be on Internet or even Youtube while on a call and the H+ is pretty fast.
I am playing around with the Settings to optimize
the switching having NO idea what I am doing just trial and error, lol.
There is a SLIM chance that there IS a Kies Download or a enable feature buried deep within the Alpha but I doubt it.
Yes, I am using Galaxy Alpha SKTelecom model, and i can use VoLTE. So it depends on your carrier, I think. Thanks.
Sent from my SM-G850S using XDA Free mobile app
kmsi said:
Yes, I am using Galaxy Alpha SKTelecom model, and i can use VoLTE. So it depends on your carrier, I think. Thanks.
Click to expand...
Click to collapse
I get VoLTE on my T-Mobile Galaxy Avant in my area, but I do NOT get VoLTE with my Galaxy Alpha. That seems to point to the device.
Corvussimo said:
I get VoLTE on my T-Mobile Galaxy Avant in my area, but I do NOT get VoLTE with my Galaxy Alpha. That seems to point to the device.
Click to expand...
Click to collapse
Yes because the Avant is a Tmobile/MetroPCS Phone it has that feature in it's Software to utilize that feature on TMo/Metro Network.
I am NOT sure if ANY Smartphone is smart enough to have VoLTE across multiple Carrier Networks- I think this is Carrier Specific .
However I have read but not confirmed that Lollipop may feature VoLTE.
If Alpha was a Tmobile phone it would have VoLTE on Tmo/Metro Network. But it is not a Tmobile Phone.
Does ANY unlocked phone do VoLTE on TMobile ? That is the question.
Hi
I am not able to activate volte in India with jio volte. Jio provides volte. Kindly help me to activate volte. I am using sm-g850y.

H930DS - LTE+ support on Indian carriers?

Guys, since chipset (SD835) on v30 supports 3CA, while OP5/5T supports LTE+ on Indian carriers Jio and airtel,
Does LG v30 - Indian H930DS model support LTE+ on Jio by any chance?
arvindgr said:
Guys, since chipset (SD835) on v30 supports 3CA, while OP5/5T supports LTE+ on Indian carriers Jio and airtel,
Does LG v30 - Indian H930DS model support LTE+ on Jio by any chance?
Click to expand...
Click to collapse
Yes.
There's also a dedicated India thread where it's all been discussed.
Sent via open market LG US998 V30/V30+
ChazzMatt said:
Yes
Click to expand...
Click to collapse
If so, I would buy this right away, if H930DS supports LTE+ and VoLTE in custom ROMs. Need to confirm if VoLTE works in LOS..
This "VoLTE" in custom ROMs at XDA has been recently evolving as taboo..!
Anyways, do you use custom ROMs in your V30..?
EDITED TO CORRECT MISINFORMATION. YOU DO NOT LOSE DUAL SIM card functionality.
arvindgr said:
If so, I would buy this right away, if H930DS supports LTE+ and VoLTE in custom ROMs. Need to confirm if VoLTE works in LOS..
This "VoLTE" in custom ROMs at XDA has been recently evolving as taboo..!
Anyways, do you use custom ROMs in your V30..?
Click to expand...
Click to collapse
The Indian LG V30+ supports Jio VoLTE on stock India Nougat. Oreo for that region has not been released yet, and while you can flash to another region to get Oreo then you would lose the Jio VoLTE.
You can only get root by flashing to H930 or the CIS H930DS OREO KDZ.
Perhaps with root you can flash parts back to get VoLTE like the Verizon guys have done -- or even 2nd SIM back -- but I can't promise that.
ChazzMatt said:
The Indian LG V30+ supports Jio VoLTE on stock India Nougat. Oreo for that region has not been released yet, and while you can flash to another region to get Oreo then you would lose the Jio VoLTE.
You can only get root by flashing to H930 and you also would lose 2nd SIM card functionality.
Perhaps with root you can flash parts back to get VoLTE like the Verizon guys have done -- or even 2nd SIM back -- but I can't promise that.
Click to expand...
Click to collapse
Thanks for your help, but I'd want to clarify the context little clear.
As you might know, Jio is LTE-only carrier and VoLTE is the only way of calling in that network. However, my question is about something else, viz. LTE+ - The capability of the phone to support certain LTE features like multiple carrier aggregations (CA), 256QAM, 64x64MIMO
Here in India, two carriers namely, Airtel and Jio have enabled LTE-CA in major cities. Hence I would want to know since some V30 Indian guys were confirming me LTE+ in Stock ROM - if LTE+ is supported even in custom ROM after BL unlock?
(Reason, why I'm looking for this, is, networks here are so much congested that during peak time, I hardly get 200kBps from single Band40-TDD LTE cell. If LTE+ is available on custom ROMs like in OP5/6 it will help get over this congestion)
arvindgr said:
Thanks for your help, but I'd want to clarify the context little clear.
As you might know, Jio is LTE-only carrier and VoLTE is the only way of calling in that network. However, my question is about something else, viz. LTE+ - The capability of the phone to support certain LTE features like multiple carrier aggregations (CA), 256QAM, 64x64MIMO
Here in India, two carriers namely, Airtel and Jio have enabled LTE-CA in major cities. Hence I would want to know since some V30 Indian guys were confirming me LTE+ in Stock ROM - if LTE+ is supported even in custom ROM after BL unlock?
(Reason, why I'm looking for this, is, networks here are so much congested that during peak time, I hardly get 200kBps from single Band40-TDD LTE cell. If LTE+ is available on custom ROMs like in OP5/6 it will help get over this congestion)
Click to expand...
Click to collapse
I don't know. I also just corrected my post for quoted. You don't lose dual SIM functionality with bootloader unlock and root on the H930.
arvindgr said:
Thanks for your help, but I'd want to clarify the context little clear.
As you might know, Jio is LTE-only carrier and VoLTE is the only way of calling in that network. However, my question is about something else, viz. LTE+ - The capability of the phone to support certain LTE features like multiple carrier aggregations (CA), 256QAM, 64x64MIMO
Here in India, two carriers namely, Airtel and Jio have enabled LTE-CA in major cities. Hence I would want to know since some V30 Indian guys were confirming me LTE+ in Stock ROM - if LTE+ is supported even in custom ROM after BL unlock?
(Reason, why I'm looking for this, is, networks here are so much congested that during peak time, I hardly get 200kBps from single Band40-TDD LTE cell. If LTE+ is available on custom ROMs like in OP5/6 it will help get over this congestion)
Click to expand...
Click to collapse
Hi, just like volte support on our indian stock, the lte+ also works only Indian stock too.
I am currently on Boobox rom rooted with twrp and bootloader unlocked I dont get lte+. Rest assured everything is working great and on lte+ I saw nothing of much improvement over airtel since they have started to compete with jio prices.
So take my words root it and feel the freedom.
mehra1 said:
Hi, just like volte support on our indian stock, the lte+ also works only Indian stock too.
I am currently on Boobox rom rooted with twrp and bootloader unlocked I dont get lte+. Rest assured everything is working great and on lte+ I saw nothing of much improvement over airtel since they have started to compete with jio prices.
So take my words root it and feel the freedom.
Click to expand...
Click to collapse
Thanks for stepping-in! I thought I wont get any further replies..
In my case, Jio has CA in 3 bands (Bands 3+5+40). And the place where I reside has pathetic network reception. I was about to switch to airtel, until I saw my friend OP5 getting marvellous speeds at the same place.
Also in your case, airtel has 2 bands CA (Bands 3+40). And since Band 3 will be so much congested, you wouldn't have got any considerable difference. Hence It should theoretically improve connectivity with my Jio..., However, before I jump, Can you install root app called NSG and share its screenshot?
arvindgr said:
Thanks for stepping-in! I thought I wont get any further replies..
In my case, Jio has CA in 3 bands (Bands 3+5+40). And the place where I reside has pathetic network reception. I was about to switch to airtel, until I saw my friend OP5 getting marvellous speeds at the same place.
Also in your case, airtel has 2 bands CA (Bands 3+40). And since Band 3 will be so much congested, you wouldn't have got any considerable difference. Hence It should theoretically improve connectivity with my Jio..., However, before I jump, Can you install root app called NSG and share its screenshot?
Click to expand...
Click to collapse
Can you specify which screenshot you exactly looking as this app has more then 10 screens.
FYI it still has lte bands 1, 3, 5, 40 and 41 which are required in India.
mehra1 said:
Can you specify which screenshot you exactly looking as this app has more then 10 screens.
FYI it still has lte bands 1, 3, 5, 40 and 41 which are required in India.
Click to expand...
Click to collapse
I'm looking for LTE CA Matrix and LTE Cell Table pages
My current Redmi Note 4 though supports 2CA, some support on modem is missing it seems... Hence it's showing LTE+ in mine despite not aggregating with 2nd cell. I was suspecting LTE+ to be still there, but may be your ROM isn't showing you.. Hence those Screenshots would help understand that..
Attaching my device screenshots..
arvindgr said:
I'm looking for LTE CA Matrix and LTE Cell Table pages
My current Redmi Note 4 though supports 2CA, some support on modem is missing it seems... Hence it's showing LTE+ in mine despite not aggregating with 2nd cell. I was suspecting LTE+ to be still there, but may be your ROM isn't showing you.. Hence those Screenshots would help understand that..
Attaching my device screenshots..
Click to expand...
Click to collapse
Here u go!
You can change and lock lte band by using this even without rooting *#546368#*930#

Unlocked AT&T Model on T-Mobile get VoLTE?

I tried the unlocked Sprint one and no VoLTE and no VoWifi. Does anyone have the unlocked ATT version LM-G850U on TMobile and if so, do VoLTE and VoWifi work?
Got one today.
No go. No VoLTE, no VoWifi.
I have a sprint version .someone find tricks to unlock
This VoLTE method probably does not work for Sprint version, but maybe someone can try it on AT&T version?
https://www.91mobiles.com/questions/how-to-enable-volte-on-lg-g8x-thinq
acefr said:
This VoLTE method probably does not work for Sprint version, but maybe someone can try it on AT&T version?
https://www.91mobiles.com/questions/how-to-enable-volte-on-lg-g8x-thinq
Click to expand...
Click to collapse
Those switches are greyed out on mine, which is (unintentionally) the Canadian version. But I have been told it is greyed out because VoLTE/Wifi Calling aren't enabled on the carrier side. In my case Ting says that my phone has LTE Band 12 and therefore VoLTE, but that will only work on ATT. A bit confusing because (like I said) the particular rom on my phone is Canadian (LMG850UM20e), so why ATT? The explanation for that, it seems is that ATT, (Sprint), and the unlocked Canadian version have the same sub-model (of the G8X - LMG850): LMG850UM. The USA unlocked version a different sub-model (LMG850QM), the rest of the world has yet another sub-model (LMQ850EMW). See this reddit post on the different models: https://www.reddit.com/r/LGG8X/comments/hvqdy4/hey_g8x_owner_what_is_the_submodel_number_and/
As far as I know all models (LMG850......) have the same hardware, the only difference are the roms, which artificially disable certain capabilities of the phone. I am pretty sure my phone would do VoLTE just fine on Ting (or most other carriers). The thing wrong here, I think, is that the IMEI and other specific identifiers of the phone artificially show that the phone does not have the functionality.
With all that said, I am still trying to find my around this problem. I'm considering flashing a different rom, tho not sure if that'll change what the IMEI and the other specific identifiers tell the cell carrier about compatibility. There is one report of T-Mobile supposedly fixing the same problem for a customer, see u/Veshtarii's comments on this reddit post: https://www.reddit.com/r/LGG8X/comments/irm2as/lg_g8x_unlocked_models_having_issues_with_us/
I also plan to keep updating this XDA forum post https://forum.xda-developers.com/lg-g8X/help/unable-to-enable-volte-wifi-calling-t4185809 with what I find out about this problem, potential solutions, and hopefully what solves it. Hopefully my post will be useful to those with the same problem.
I have concluded it's not possible on any TMO towers. See my forum post for more details: https://forum.xda-developers.com/lg-g8X/help/unable-to-enable-volte-wifi-calling-t4185809
Odd since t-mobile now owns Sprint. You would think t-mobile would allow or update the sprint version to use wifi/volte etc..
Perhaps future t-mobile firmware/security updates will patch the sprint to use these services.. Certainly NOT customer friendly for those who migrated from sprint to t-mobile.
I can understand the att version not working w t-mobile but not the sprint version
foxxyman said:
I have concluded it's not possible on any TMO towers. See my forum post for more details: https://forum.xda-developers.com/lg-g8X/help/unable-to-enable-volte-wifi-calling-t4185809
Click to expand...
Click to collapse
As far as I know, only the official US unlocked version LMG850QM has support for TMO VoLTE. None of other variants will work.
acefr said:
As far as I know, only the official US unlocked version LMG850QM has support for TMO VoLTE. None of other variants will work.
Click to expand...
Click to collapse
Maybe, I'm not sure still, even after all the research I've done. But I don't know everything of course. Also, after looking on ebay, the LMG850QM is like 450$ at the cheapest, compared to the 250$ of the LMG850UM ATT or Sprint versions, (the Canadian unlocked version is like 200$).
---------- Post added at 01:16 AM ---------- Previous post was at 01:12 AM ----------
wogeboy said:
Odd since t-mobile now owns Sprint. You would think t-mobile would allow or update the sprint version to use wifi/volte etc..
Perhaps future t-mobile firmware/security updates will patch the sprint to use these services.. Certainly NOT customer friendly for those who migrated from sprint to t-mobile.
I can understand the att version not working w t-mobile but not the sprint version
Click to expand...
Click to collapse
If you look in my forum post I referenced to in the previous comment of this post, I reference a reddit post where there is one person on sprint that got it working with a TMO tech person. That's the time I've heard about getting it working on T-Mobile.
This MAY HELP
I have a Sprint unlocked version, runs on T-Mobile. No wifi-calling menu.
BUT I downloaded and installed an app from Play Store called Wifi Calling written by Widget7 (get the right one), This simple app appeared to turn on the wifi-calling feature in the hidden menu. Long story short, I got wifi- calling on T-Mobile.
reachforthesky said:
This MAY HELP
I have a Sprint unlocked version, runs on T-Mobile. No wifi-calling menu.
BUT I downloaded and installed an app from Play Store called Wifi Calling written by Widget7 (get the right one), This simple app appeared to turn on the wifi-calling feature in the hidden menu. Long story short, I got wifi- calling on T-Mobile.
Click to expand...
Click to collapse
what about volte?
doctorman said:
what about volte?
Click to expand...
Click to collapse
The WiFi Calling app only reveals the hidden menu, nothing more.
T-Mobile have VoLTE on by default. You can disable it by selecting different types of mobile networks such as Automatic 3G/2G, LTE/3G, or 2G only. I have no experience on this.
I have confirmed this by dialing *#*#4636#*#* Both data and voice are over LTE. And the VoLTE on/off button is grayed out (based on the type of mobile network selected).
reachforthesky said:
The WiFi Calling app only reveals the hidden menu, nothing more.
T-Mobile have VoLTE on by default. You can disable it by selecting different types of mobile networks such as Automatic 3G/2G, LTE/3G, or 2G only. I have no experience on this.
I have confirmed this by dialing *#*#4636#*#* Both data and voice are over LTE. And the VoLTE on/off button is grayed out (based on the type of mobile network selected).
Click to expand...
Click to collapse
I mean does it matter which variety of the phone I have?
if I have a sprint model, will it work fully on tmobile with volte and wifi calling?

Question Does it matter which model i get? XQ-CT62 US version or Global version?

Hey guys when i go to Sony website and look up bootloader unlock instructions. it says the US variant is locked by verizon.
this is the version i have. Does that mean i cannot unlock bootloader? do i need to return my phone and the global version? The guides posted on here don't seem to mention the model number as if it matters.
Unlock Bootloader - Open Devices - Sony Developer World
developer.sony.com
Unless anything has changed, it is generally known that Verizon phones have a locked bootloader for customer security and in Verizon's interest.
ze7zez said:
Unless anything has changed, it is generally known that Verizon phones have a locked bootloader for customer security and in Verizon's interest.
Click to expand...
Click to collapse
Yea I am a first time sony buyer. the phone i have is actually the 5 IV which we don't have a forum for yet.
I usually am buying older phones with established guides and hacks to unlock on here. So i simply missed this since i didn't see it plastered everywhere on the front page of the some other sony forums. my bad.
I am not surprised. just ordered the wrong one thinking it didn't matter for the sony brand.
returning mine now. and ordering the 72.
thud1 said:
Yea I am a first time sony buyer. the phone i have is actually the 5 IV which we don't have a forum for yet.
I usually am buying older phones with established guides and hacks to unlock on here. So i simply missed this since i didn't see it plastered everywhere on the front page of the some other sony forums. my bad.
I am not surprised. just ordered the wrong one thinking it didn't matter for the sony brand.
returning mine now. and ordering the 72.
Click to expand...
Click to collapse
It's the same reason I returned US version and bought international version ct72 . So make sure about bands supports for 71 it has 66 which is TMobile and band 41 which i get some good speed depending on the location I'm in.
same here I wanted to root and Use Repainter app and change fonts and I did have the CT62, but I return it back to Sony and bought the CT72, sad that sony doesn`t allow the bootloader to be unlocked on the CT62.
2015Ducatimulti said:
same here I wanted to root and Use Repainter app and change fonts and I did have the CT62, but I return it back to Sony and bought the CT72, sad that sony doesn`t allow the bootloader to be unlocked on the CT62.
Click to expand...
Click to collapse
Right i thought they allowed bootloader unlocked on any Xperia really sucks that they didn't allowed it on US specially if I'm paying 1600+ on it lol
raven213 said:
Right i thought they allowed bootloader unlocked on any Xperia really sucks that they didn't allowed it on US specially if I'm paying 1600+ on it lol
Click to expand...
Click to collapse
my exact thoughts, 1600.00, no thanks, buy the CT72 and save some money, only thing is you don`t get the USA warranty when you buy the Non-US version, and some missing 5G band`s and the missing MMWave bands
As @2015Ducatimulti mentioned, there is something missing there between the two version.
There is Hardware differences between CT72 and CT62. The US version supports has mmW support and also more bands that are available in the US such as band 2, 66, and 71 used by TMO in addition to mmW 260 and 261.
if your carrier does not have use of these bands and mmW frequencies, then the CT72 should still work as long as you flash the US version ROM. otherwise, you will have coverage issues due and high call drops due to the limited US band support
hnt20 said:
As @2015Ducatimulti mentioned, there is something missing there between the two version.
There is Hardware differences between CT72 and CT62. The US version supports has mmW support and also more bands that are available in the US such as band 2, 66, and 71 used by TMO in addition to mmW 260 and 261.
if your carrier does not have use of these bands and mmW frequencies, then the CT72 should still work as long as you flash the US version ROM. otherwise, you will have coverage issues due and high call drops due to the limited US band support
Click to expand...
Click to collapse
Flashing US ROM on ct72 will give you signal issues. So far i haven't found a way to get signal working on it.
That might make sense since the RF hardware is different between them and hence the software might not work as expected
FWIW, I just got the Xperia 1 IV, CT-72, using it on AT&T (primary subscriber, no MVNO). Just using the stock ROM, didn't flash any other ROMS.
So far I appear to have 5G as well as VoLTE. No VoWIFI, but I don't care about that anyway.
I'll use it for another week or so to see if AT&T decides to shutdown service for a non whitelisted device, but so far so good. And it was $840 new, vs $1600 for the USA version, so a HUGE cost difference
I by the way did first have to do the trick where you disable dual-sim and only use the primary SIM slot.
Sakete said:
FWIW, I just got the Xperia 1 IV, CT-72, using it on AT&T (primary subscriber, no MVNO). Just using the stock ROM, didn't flash any other ROMS.
So far I appear to have 5G as well as VoLTE. No VoWIFI, but I don't care about that anyway.
I'll use it for another week or so to see if AT&T decides to shutdown service for a non whitelisted device, but so far so good. And it was $840 new, vs $1600 for the USA version, so a HUGE cost difference
I by the way did first have to do the trick where you disable dual-sim and only use the primary SIM slot.
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Is your CT-72 still working on AT&T?
tonysunshine said:
Is your CT-72 still working on AT&T?
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Mine is still going fine on Att elite
David.k20z1 said:
Mine is still going fine on Att elite
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XQ-CT72 No go on Cricket. Data works fine but no calls.

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