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[Q] International (D6603) vs T-Mobile (D6616) pros/cons

For those of us who will be using T-Mobile as our carrier and are considering buying an international variant of the Z3 instead of the T-Mobile variant, what are all of the pros/cons? There's only a few that I can think of, and some important ones that we need someone to confirm if possible.
Pros:
Unlocked bootloader
Color options other than black
Cons:
No international variant with LTE Band 12 support
No VoLTE support?
No WiFi Calling support (Android 4.4.4 or Android 5.0)?
Can't use Jump! (ie. no insurance)
Although perhaps negligible, less battery life (from having more frequency support)?
16GB Internal Storage

Pretty much summed it up. The battery life difference should be negligible. T-Mobile version does have 32GB internal storage as well.

se1000 said:
Pretty much summed it up. The battery life difference should be negligible. T-Mobile version does have 32GB internal storage as well.
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Click to collapse
There is only one thing I cannot find any clarification on, and that's whether or not the T-Mobile version as Band 12 support. T-Mobile's site says no - Sony's site says yes. Do we know which to believe?
-Collin-

CollinFX45 said:
There is only one thing I cannot find any clarification on, and that's whether or not the T-Mobile version as Band 12 support. T-Mobile's site says no - Sony's site says yes. Do we know which to believe?
-Collin-
Click to expand...
Click to collapse
I would say that the T-Mobile version definitely has Band 12, but that it isn't active yet and will be turned on when the network is ready.

CollinFX45 said:
There is only one thing I cannot find any clarification on, and that's whether or not the T-Mobile version as Band 12 support. T-Mobile's site says no - Sony's site says yes. Do we know which to believe?
-Collin-
Click to expand...
Click to collapse
There's no debate on this. The T-Mobile version (D6616) has LTE Band 12. T-Mobile may simply not be listing it because they don't want to advertise a network that isn't up yet.

se1000 said:
Pretty much summed it up. The battery life difference should be negligible. T-Mobile version does have 32GB internal storage as well.
Click to expand...
Click to collapse
Forgot about the storage difference. I've added that now.

s1dest3pnate said:
There's no debate on this. The T-Mobile version (D6616) has LTE Band 12. T-Mobile may simply not be listing it because they don't want to advertise a network that isn't up yet.
Click to expand...
Click to collapse
Thanks, glad to hear it.
After the Moto X "Pure Edition" I purchased as supposedly having Band 12 and finding out it didn't, I'm overly cautious I guess! Then again, I live in the Bay Area and I think T-mo has a lot of work to do to clear up the Band 12 licenses here unfortunately.
-Collin-

One think to mention of the international version is that it isn't carrier locked and that it is free from T-Mobile's bloatware. I also like a device without carrier's logo on it. Copper and White Z3s looks awesome. Happened the same with my first Xperia Z1, it was international version purple color when all other T-Mo customers has black Z1s.

se1000 said:
I would say that the T-Mobile version definitely has Band 12, but that it isn't active yet and will be turned on when the network is ready.
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Click to collapse
There is something else that is unclear to me: • VoLTE support! I did see the T-Mobile's version having an option in settings>call settings: Enable VoLTE if available (check mark). So international version won't have this?

I don't know if the D6603 has the VoLTE menu ootion, however on a hardware level I believe it does.

abhinav.tella said:
I don't know if the D6603 has the VoLTE menu ootion, however on a hardware level I believe it does.
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Click to collapse
Thanks. I was ready to buy an unlocked version, but I saw this thread, so I searched online yesterday for a good 30+ minutes, even Z3's white pages, specs, but nothing that would mention VoLTE. The interesting thing that I found is that Xperia Z3 Compact, does mention VoLTE support. I also emailed few people on youtube that had made videos about Z3, waiting on their reply.

Anyone able to confirm if T-Mobile VoLTE works on the D6603 model? Screenshot showing the HD icon?

I can confirm it does have volte. Now if we could just get root Haha!! __
Sent from my D6616 using XDA Free mobile app

s1dest3pnate said:
Anyone able to confirm if T-Mobile VoLTE works on the D6603 model? Screenshot showing the HD icon?
Click to expand...
Click to collapse
I had a D6603 using it on tmobile for a good week. No Volte and no Wifi calling. Thats confirmed.

This white paper PDF from the Sony Developer World website contains charts showing the differences between all the Z3 models. It also shows LTE band 12 support in model D6616.
http://dl-developer.sonymobile.com/...ria_Z3_D6603_D6633_D6643_D6653_D6616_WP_1.pdf

Load TMobile software on a D6603 Z3??
Hey everyone. I own a international Sony Xperia Z3 model D6603 and was wondering if it was possible to load US TMobile D6616 software on it in order to enable WiFi calling/texting??
Thanks for everyone's help!

I would imagine so. Just use FlashTool and XperiFirm, but be ready to roll back with the proper files in case something goes wrong. So I'm not 100% sure, but I'd imagine you can if the hardware is similar enough. Do at your own risk, though - perhaps someone who knows more than me about this could chime in.

i just put my t mobile sim in a D6603 and can make calls, but i can't get 4g, 3g or even 2g...
what's going on? bad unit?
Sent from my XT1053 using XDA Free mobile app

gcbxda said:
i just put my t mobile sim in a D6603 and can make calls, but i can't get 4g, 3g or even 2g...
what's going on? bad unit?
Sent from my XT1053 using XDA Free mobile app
Click to expand...
Click to collapse
You likely need to add your APN. Should be plenty of info on how to do that online.

gcbxda said:
i just put my t mobile sim in a D6603 and can make calls, but i can't get 4g, 3g or even 2g...
what's going on? bad unit?
Sent from my XT1053 using XDA Free mobile app
Click to expand...
Click to collapse
Did it work eventually???

VoLTE on unlocked version

I have a feeling I know the answer to this, but is there any way to enable VoLTE on the unlocked version, notably on the Rogers network in Canada?
Thanks

DenisEhm said:
I have a feeling I know the answer to this, but is there any way to enable VoLTE on the unlocked version, notably on the Rogers network in Canada?
Thanks
Click to expand...
Click to collapse
Only if you have a 4G sim card and your network provider support this on your tariff

Nyssa1104 said:
Only if you have a 4G sim card and your network provider support this on your tariff
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Click to collapse
Ok thanks. That would be a yes on all of those (as it worked on my GS7 quite well) so is it just an option in the settings? If so I can't find it..?

DenisEhm said:
Ok thanks. That would be a yes on all of those (as it worked on my GS7 quite well) so is it just an option in the settings? If so I can't find it..?
Click to expand...
Click to collapse
Settings-->More-->Mobile network-->VoLTE calls. Enable that. If LTE stays connected when making a call you have VoLTE.

kevev said:
Settings-->More-->Mobile network-->VoLTE calls. Enable that. If LTE stays connected when making a call you have VoLTE.
Click to expand...
Click to collapse
Thanks but that's what I originally feared: there is no VoLTE option anywhere in there..? I had done a search too and nothing pops up.
Rummaging through the internet, I found an article saying the unlocked version (mine) would NOT have VoLTE. No sure how accurate that was.

DenisEhm said:
Thanks but that's what I originally feared: there is no VoLTE option anywhere in there..? I had done a search too and nothing pops up.
Rummaging through the internet, I found an article saying the unlocked version (mine) would NOT have VoLTE. No sure how accurate that was.
Click to expand...
Click to collapse
Are you connected to Wind by any chance? I don't think that network has volte yet. I think Rogers purchased them.

No, I'm on Rogers and I can confirm I had VoLTE before on my Galaxy S7, so it's neither the network or my account the issue.

DenisEhm said:
No, I'm on Rogers and I can confirm I had VoLTE before on my Galaxy S7, so it's neither the network or my account the issue.
Click to expand...
Click to collapse
Very weird. Maybe ask your carrier to check provisioning for your device. What bands does your carrier use for VoLTE?

it should be supported bu carrier it self , not only the phone ! check with them !

Well after some investigating, I have an answer: Rogers only support VoLTE on Apple, LG and Samsung devices...
This is really unfortunate but it's one last thing missing from the Honor 8 to make it my daily driver. It's an excellent device and I was very impressed for the price tag, but not having wireless charging, VoLTE and 4k video made me realize how much I actually use it.
Thanks for the help guys!
Sent from my SM-G930W8 using XDA-Developers mobile app

DenisEhm said:
Well after some investigating, I have an answer: Rogers only support VoLTE on Apple, LG and Samsung devices...
This is really unfortunate but it's one last thing missing from the Honor 8 to make it my daily driver. It's an excellent device and I was very impressed for the price tag, but not having wireless charging, VoLTE and 4k video made me realize how much I actually use it.
Thanks for the help guys!
Sent from my SM-G930W8 using XDA-Developers mobile app
Click to expand...
Click to collapse
Price Tag is Good Comparing With iPhone and Samsung . You Welcome , if u have any other Questions We Will Be happy To help you .,
GD Luck !

No data during calls?

Hi Guys,
I'm using the US Mate 9 with AT&T, a GSM provider. I noticed when I'm on a call either there is no data (Internet) available or very patchy with the screen on...
Wanted to ask you guys if this is normal and expected behavior?
Thanks!

I dont think is normal, I've seen icon change from 4g to 3g to H+ when I'm on calls but still able to open facebook,whatsapp or firefox while calling. I'm with Tmo tho.

ProFragger said:
Hi Guys,
I'm using the US Mate 9 with AT&T, a GSM provider. I noticed when I'm on a call either there is no data (Internet) available or very patchy with the screen on...
Wanted to ask you guys if this is normal and expected behavior?
Thanks!
Click to expand...
Click to collapse
It's because At&t doesn't allow VoLTE on the Mate 9 so when you make a call you get dropped to 4g or 3g speeds. T-Mobile allows VoLTE so data doesn't change due to a call. I run both sims in mine and it's why I keep my personal line on T-Mobile and use it's data. My At&t line is strictly for work calls.
Sent from my MHA-L29 using Tapatalk

ilbambino said:
I dont think is normal, I've seen icon change from 4g to 3g to H+ when I'm on calls but still able to open facebook,whatsapp or firefox while calling. I'm with Tmo tho.
Click to expand...
Click to collapse
wingzfan said:
It's because At&t doesn't allow VoLTE on the Mate 9 so when you make a call you get dropped to 4g or 3g speeds. T-Mobile allows VoLTE so data doesn't change due to a call. I run both sims in mine and it's why I keep my personal line on T-Mobile and use it's data. My At&t line is strictly for work calls.
Sent from my MHA-L29 using Tapatalk
Click to expand...
Click to collapse
Thanks for your responses guys... In all my years of using all these different phones on AT&T, I've never ever noticed this since the Verizon days. I'll take the degraded 3G or H+, but yesterday it went straight to no data. Do you guys think I need an adjustment in my APN or is it a buried setting somewhere to fix it?
Thanks!

ProFragger said:
Thanks for your responses guys... In all my years of using all these different phones on AT&T, I've never ever noticed this since the Verizon days. I'll take the degraded 3G or H+, but yesterday it went straight to no data. Do you guys think I need an adjustment in my APN or is it a buried setting somewhere to fix it?
Thanks!
Click to expand...
Click to collapse
I didn't adjust anything with my At&t sim so I don't think you should need to either. Also this is a brand new sim and number so it was never in a different phone. I know on my Axon I had to put it in my iPhone first to get it working properly but not this phone. Are you in a good coverage area?
Sent from my MHA-L29 using Tapatalk

Are you sure about this device not doing VoLTE.
Sent from my MHA-L29 using XDA-Developers Legacy app

ekerbuddyeker said:
Are you sure about this device not doing VoLTE.
Sent from my MHA-L29 using XDA-Developers Legacy app
Click to expand...
Click to collapse
The device does VoLTE, At&t however isnt allowing it on the device. I can switch my data to my At&t sim and take a screen shot and back to T-Mobile and take one if need be.
---------- Post added at 09:20 AM ---------- Previous post was at 09:11 AM ----------
I notice after the update today the "HD" icon next to the call timer is gone. That sucks.
Sent from my MHA-L29 using Tapatalk

wingzfan said:
The device does VoLTE, At&t however isnt allowing it on the device. I can switch my data to my At&t sim and take a screen shot and back to T-Mobile and take one if need be.
---------- Post added at 09:20 AM ---------- Previous post was at 09:11 AM ----------
I notice after the update today the "HD" icon next to the call timer is gone. That sucks.
Sent from my MHA-L29 using Tapatalk
Click to expand...
Click to collapse
Is the 4GLTE icon for Tmobile? I dont get to show the LTE letters but only 4G in mine, probably because is the Chinese version.

ilbambino said:
Is the 4GLTE icon for Tmobile? I dont get to show the LTE letters but only 4G in mine, probably because is the Chinese version.
Click to expand...
Click to collapse
Both At&t and T-Mobile show 4gLTE icons but At&t's drops to 4g only while in a call, T-Mobiles stays 4gLTE which verifies VoLTE only works on T-Mobile.
I believe you're correct and the Chinese variant doesnt show LTE.

[SOLVED]
Guys, thanks for all your helpful responses! Just to close the loop on the issue of *NO DATA* during calls was fixed with the check box, checked in the attachment.
Although, as shared here, it's possible that it's H+ or 3G only service, not true LTE.
Thanks!

Alternative Solution
I had the same problem, I found out that this box was already checked on my phone, What fixed it for me was checking Mobile Network -> Access Point Names> selecting "ATT Phone"
I had initially selected "ATT Nextgenphone."
ProFragger said:
Guys, thanks for all your helpful responses! Just to close the loop on the issue of *NO DATA* during calls was fixed with the check box, checked in the attachment.
Although, as shared here, it's possible that it's H+ or 3G only service, not true LTE.
Thanks!
Click to expand...
Click to collapse

Oladi_Olada said:
I had the same problem, I found out that this box was already checked on my phone, What fixed it for me was checking Mobile Network -> Access Point Names> selecting "ATT Phone"
I had initially selected "ATT Nextgenphone."
Click to expand...
Click to collapse
Ah! Good tip bud!

HTC U11 AT&T Version

has anyone bought the HTC U11 AT&T Version ( I know is the same as the unlocked version ) just want to know if it comes pre-loaded with AT&T software like VVM (visual voicemail) My AT&T app and stuff like that also if wifi calling & VoLTE works on that version

No, the AT&T version is simply the unlocked model. It does not come with any carrier specific applications. If you are wondering how you're going to get them on your phone this is how it works
When you insert your AT&T Sim card into the phone the phone will ask you to restart, after you do that the next time you go into the play store carrier specific applications such as visual voicemail and My AT&T will be available for download. I had the same question last year because the HTC 10 was the first factory unlocked phone that I have bought
you also won't have any problem with Wi-Fi calling or voice over LTE take it from me, if you ask the carriers themselves they will tell you that because you are using an unlocked device that it will not work but everything will be fine

Wi-Fi calling never worked on HTC 10 on AT&T

JEANRIVERA said:
Wi-Fi calling never worked on HTC 10 on AT&T
Click to expand...
Click to collapse
That's odd it did for me right out of the box

Mark112887 said:
That's odd it did for me right out of the box
Click to expand...
Click to collapse
Imposible on AT&T no one ever had Wi-Fi calling on HTC 10 but VoLTE did work

If you can show any proof of it?

JEANRIVERA said:
If you can show any proof of it?
Click to expand...
Click to collapse
not sure how I just notice a difference in quality

Mark112887 said:
not sure how I just notice a difference in quality
Click to expand...
Click to collapse
The icon of the phone in the top with Wi-Fi bars that is how you know you have Wi-Fi calling, you probably only had VoLTE that's why you noticed better call quality

JEANRIVERA said:
The icon of the phone in the top with Wi-Fi bars that is how you know you have Wi-Fi calling, you probably only had VoLTE that's why you noticed better call quality
Click to expand...
Click to collapse
WHOA. How did you get WiFi calling to work on your HTC 10 on AT&T? (or is that just an example of what it would look like if it did work?)

holz75 said:
WHOA. How did you get WiFi calling to work on your HTC 10 on AT&T? (or is that just an example of what it would look like if it did work?)
Click to expand...
Click to collapse
Just an example
Sent from my HTC U11 using XDA Labs

T-Mobile VoLTE and WiFi calling

Can anyone confirm working T-Mobile VoLTE and WiFi calling in Philadelphia area with the 8? I'm looking buy the 8 directly from OnePlus, but I'm seeing conflicting reports of VoLTE and WiFi calling NOT working properly.
Thanks.

Is anyone with the IN2015 variant using T-Mobile getting VoLTE and WiFi calling?

BeardKing said:
Is anyone with the IN2015 variant using T-Mobile getting VoLTE and WiFi calling?
Click to expand...
Click to collapse
I'm in Massachusetts using an IN2015 on T-Mobile and just verified that VoLTE and VoWiFi are working fine for me.

rbet said:
I'm in Massachusetts using an IN2015 on T-Mobile and just verified that VoLTE and VoWiFi are working fine for me.
Click to expand...
Click to collapse
Thank you! You don't know how hard it's been to get an answer to this. ?️

BeardKing said:
Thank you! You don't know how hard it's been to get an answer to this. ️
Click to expand...
Click to collapse
Happy to help
A little heads up though to get anything other than WiFi working I did have to go into the SIM settings and turn on mobile data as well as enable VoLTE and VoWiFi, not sure if that was related to activating it on release day or because it's the global model on T-Mobile (didn't really look into it since it was just flipping 3 settings then everything just worked).

rbet said:
Happy to help
A little heads up though to get anything other than WiFi working I did have to go into the SIM settings and turn on mobile data as well as enable VoLTE and VoWiFi, not sure if that was related to activating it on release day or because it's the global model on T-Mobile (didn't really look into it since it was just flipping 3 settings then everything just worked).
Click to expand...
Click to collapse
Appreciated!

I have the TMobile model and can't find the volte and vowifi settings anywhere?? I'm sure they're enabled but I want to make sure