yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S7 Questions and Answers] jjohn7293:
For anyone still trying to get the g930f to work with T-Mobile, I have tried and tried but I felt that it was a losing battle anyway because T-Mobile deprioritizes you after 21 GB. I found out that cricket just recently released an unlimited everything plan including unlimited LTE with no throttling or slow downs for $70, or $65 if you have auto pay. Here's the kicker tho... The reason they offer unlimited LTE on the ATT network while charging less than ATT is because the max speed is 8mbs. I switched because that beats my T-Mobile average speed anyway
[Samsung Galaxy S7 Questions and Answers] radiohead14:
has there been solid confirmations on both questions above? thanks
[Samsung Galaxy S7 Questions and Answers] phoenix_rizzen:
Hrm. Would this also work with the Canadian version? It's also a Exynos, and (from what I've read) compatible with G930F ROMs.

Wonder if that would allow Android Pay/Samsung Pay to work? SureTap Wallet (the hokey Canadian equivalent) is anemic and restricted to a single banks' credit cards. :(
[Samsung Galaxy S7 Questions and Answers] vzaliva:
Thank you very much for researching this! I am extremely curious to hear from somebody who tried Czech firmware on T-mobile USA. At this moment I could not experiment with updating firmware on my S7 as it is my main phone which is critical for my work and have tons of data, applications and settings which I do not want to re-install and re-configure. But if somebody will confirm that Czech firmware provides Wi-Fi calling I will do it.
[Samsung Galaxy S7 Questions and Answers] lost_:
I think collectively all the information on this thread is pretty complete regarding the current state of T-Mobile US VoLTE on 930F. Those who are curious just have to go through this thread thoroughly.

As noted on the various posts, T-Mobile US VoLTE worked for some. I tried their same method and it didn't work for me, even after painstakingly modifying CSC files (I happen to have both 930T and 930F). I pm'd someone (who does not yet own a 930F) and got more information about the framework needing to be modified to enable VoLTE on T-Mobile USA network, due to the way constants are compiled. I don't have the time to do it but hopefully when he gets his international variant, he would work on it. Don't ask me who it was as I'm sure if/when he's done it, he'll share it here on XDA.
[Samsung Galaxy S7 Questions and Answers] SithLord***679:
To The Members Who Flashed Their Samsung S7 G930F to T-Mobile Czech

So What Type of Network Icons Are You Getting on T-Mobile Czech ? E.g E,3G and LTE or E,H+ and 4G ?

Personally I Like E,3G and LTE icons Better
[Samsung Galaxy S7 Questions and Answers] bwhite12345:
LTE icons and much better speeds.

G935FD on stock firmware was <1M down, 2-3M up on T-Mobile, ~8M up/down on AT&T. Both said 4G - never saw LTE.

Flashed to T-Mobile Czech, now getting 30M up/down on T-Mobile, ~ 8M up/down on AT-T. Both now say LTE.

While LTE Discovery showed LTE towers, on stock firmware it was like it wasn't actually using LTE but older 2G-4G networks on both carriers. With T-Mobile Czech firmware it is now definitely using LTE on both carriers.

Native T-Mobile and AT&T SIMs, not MVNOs.

No wi-Fi calling option though - would love to attain that for T-Mobile given the way it's network is.
[Samsung Galaxy S7 Questions and Answers] thegendler:
You flashed the G930F to the Czech T-Mobile firmware? Can you link to that firmware? Do you also have a G930FD? Did you change the firmware on that at all?
[Samsung Galaxy S7 Questions and Answers] rp3:
Can you upload your CSC files, (others.xml and customer.xml from system/csc). I have been trying to modify my tekHD install to support VOLTE.
[Samsung Galaxy S7 Questions and Answers] bwhite12345:
Sadly I am returning my 935FD as I could never get the two SIMs to play nicely in this phone (for data). Phone worked great with either SIM installed, but with both installed I could not get a stable data connection. I think it is meant for two SIMs from same carrier to have a second voice/text line, but not meant for two SIMs from different carriers. At least TMo and ATT don't work well in this phone when both installed, unsure of other carrier combinations. When I did manage to get data working from one SIM when both SIMs were installed, it would fail to transition to and from Wi-Fi and reconnect to LTE/4G on a consistent basis unless I rebooted the phone after leaving Wi-Fi.

Never attained VoLTE or TMo WiFi using various ROM found in other threads. Wi-Fi on TMo is important to me because they really suck as a carrier and I need it in my home despite being in an urban setting close to a city center. I also get free TMo in-flight texting on GoGo equipped planes and since I travel a good bit that is a nice perk, but it requires TMo WiFi. Unlocked 935T is on the way.
[Samsung Galaxy S7 Questions and Answers] filterxg:
Super helpful! You just saved me $500.

My work restricts me to AT&T galaxy phones (unrooted) or iPhones. Then I have T-Mobile for my personal phone.

I've wanted to merge the two on a dual sim phone for a long time. And had hoped this would be the phone that finally did it.

Guess the wait continues.
[Samsung Galaxy S7 Questions and Answers] five40:
Not true!

I get wifi calling on my Nexus 6P

As for VoLTE I haven't investigated into the matter.
[Samsung Galaxy S7 Questions and Answers] jrfan888:
I currently use T-Mobile and ATT on the same G930FD. I dont see a data hand off problem. i always keep my data on the T-Mo sim and voice calling on the ATT.
[Samsung Galaxy S7 Questions and Answers] EddiePR:
I have sm-g930f unlocked on tmobile netwok and i have no Volte on settings. When i do a call the signal changes LTe to 3G. Before this i had the tmobile note 5 and i remember the international roms lost the option of volte and wifi calling. You need a tmobile rom and kernel
[Samsung Galaxy S7 Questions and Answers] :
Is your tmo sim 1 or 2? I have tmo and att as well on a g930fd and mine prefers sim 1 (tmo) for data. Even on the latest firmware samsung hasnt fixed it. When im driving in the car, moving around town, etc it it will switch from sim 2 data which is att to sim 1 and of course sim 1 at the time is not set for data so im dead in the water until I check the phone. I would leave it on sim 1 for data since I have an unlimited plan but tmo coverage in the Dallas area has always been hit or miss. Its their band 4 that sucks. I have better signal with band 12 or band 2 but all my phones seem to prefer tmo band 4 which just doesnt work as well as band 12 in low signal areas, and good luck with band 4 inside buildings. Which is why my other sim is att. Im tempted to cancel tmo and switch it to att but I pay a lot less with tmo and I like tmobile tuesdays lol. Lately I just leave sim 1 disabled until I really need it since it seems to be better on battery and the number autoforwards anyway.
[Samsung Galaxy S7 Questions and Answers] jrfan888:
T-Mo is in the first slot and Att in the second. I didn't think it mattered because when I switch, I make sure it matches the one I'm making calls with so I have LTE.
[Samsung Galaxy S7 Questions and Answers] :
Ive noticed and others have reported the issue on the regular s7 and edge duos that the active data sim will automatically switch to the other sim for data, which isnt active for data so then you have nothing until you switch them back manually. Problem doesnt exist if I just disable one of the sims. Ifs frustrating.
[Samsung Galaxy S7 Questions and Answers] jrfan888:
Oh, I see. Then I have noticed my data sim switching to the other, but don't recall losing data all together. I'm definitely going to be more observant now.
[Samsung Galaxy S7 Questions and Answers] POQbum:
So is it possible to flash a t-mobile Rom on the Galaxy s7 international FD (dual sim) exynos version? Has anyone successfully tried? I'm wanting to get volte working
[Samsung Galaxy S7 Questions and Answers] MAX 404:
Hi

that would be hard a they have different processors....Qualcomm - Exynos , at least not stock roms

but you could try this:

http://xdaforums.com/showpost.php?p=66452064&postcount=65

http://xdaforums.com/showpost.php?p=66471813&postcount=82
[Samsung Galaxy S7 Questions and Answers] thekosmicdesign:
I am considering buying an international unlocked version of this phone for use on T-Mobile. I never even was aware of volte until reading this thread. Now that I know what it is, it would be nice to have HD voice calling like my iphone friends. Anyway, my questions:

1. If I buy an unlocked phone, will I be able to just walk into a T-Mobile store and they will be able to set it up for me? I currently have an LG G3, which uses a micro sim and not a nano sim so I don't think I can just switch out the sims at home.

2. I'm not that familiar with bands, but will I get 99% of the calling capability in my area (Los Angeles) as the US version?

I'm mainly looking to get an international unlocked version because I don't want T-Mobile bloatware, but want to keep all functionality the same. My current phone is rooted with several mods (xposed, g3tweaksbox) and my phone before this had a custom rom, but I'm thinking about keeping my next phone stock. It seems to me like there are always problems with rooting and roms. So if my phone is stock, I definitely don't want all that bloat. Thanks for any insight.
[Samsung Galaxy S7 Questions and Answers] POQbum:
Thanks for pointing me in the right direction, I'm checking these out and I'll post back to this thread if it works.

1) Don't worry about them setting it up for you. Do this:

a) Ask them for a nano SIM (that is linked to your account), it will cost you $10.

b) Put the sim in your phone.

c) Use phone.

It is possible you may have to setup the SIM the first time you put it in (if it is not already "pre-linked" to your account) which requires simply calling T-Mobile support and verifying a couple things / possibly your IMEI number on your phone. I didn't have to do this for my past 2 devices however. The store employees could also do this for you instead of calling, which they should if you buy the nano sim from the store.

2) The international version gets every single band that T-Mobile uses.

The only thing I would reccomend is optimizing your APN Settings on your phone, which can be found under

Settings >> Mobile Networks >> Access Point Names >> T-Mobile GRPS.

Leave everything default however make sure the following variables are set:

APN:[B] fast.t-mobile.com[/B]
MMSC: [B]http://mms.msg.eng.t-mobile.com/mms/wapenc[/B]
MCC: [B]310[/B]
MNC: [B]260[/B]
APN Type: [B]default,supl,mms[/B]
APN protocol: [B]IPv4[/B]
APN roaming protocol: [B]IPv4[/B]

The above basically will force your phone to use IPv4, which not only creates less problems but also works with MMS well and ensures you won't have any wonky connection issues.
[Samsung Galaxy S7 Questions and Answers] thekosmicdesign:
Thank you POQbum! I'm thinking now that I actually want root at least haha. There are several apps I purchased which are very useful that require root (e.g. Titanium Backup).
[Samsung Galaxy S7 Questions and Answers] Superaka:
Man I just bought my G930FD thinking it'll work great with tmobile and use band 12 and I found out about this VoLTE stuff. My office LTE reception on the G930FD is still horrid, only connecting to band 4, even though I know there is band 12 in the area. Would really appreciate it if anyone can find a solution.
[Samsung Galaxy S7 Questions and Answers] MAX 404:
Hi mate

Looking forward to your findings!!
[Samsung Galaxy S7 Questions and Answers] POQbum:
From what I've read and seen it should work completely fine on band 12, however VoLTE will not work. When you place a call it will change to HSPA+ (which if you're not familiar is 4G, but not LTE). I was still able to browse the web and use my GPS while talking on the phone. After ending the call it jumps back up to LTE.

A couple of things I've noticed on the international version vs the T-Mobile version:

1) T-Mobile U.S. purposely sets the bars to be show higher even if the actual signal strength (dBm) is the same. So even if you are getting 1 little bar, it would likely show 2-3 bars if you had a T-Mobile device even with the same (dBm).

I compared a T-Mobile Galaxy S7 and my international S7 and the T-Mobile banded S7 had 2-4dBm's lower (which is higher signal strength), which is not very different, basically the same.

As a side note:

4G icon on S7 international version = 4G LTE on T-Mobile devices

HSPA+ icon on international = 4G on T-Mobile

2) The international version does actually have a weaker radio. Due to EU regulations (I believe) there are limits on how much radio radiation a phone can emit, so it is slightly (very slightly) weaker in picking up a signal. However it isn't much of a difference and you would not realistically notice a difference unless you already had very spotty coverage.

I'm still using stock firmware and plan to stay on it unless someone comes out with working CSC that will allow Exynos phones to use VoLTE.

Currently the only CSC file to work with VoLTE is coded for the Snapdragon processors, and there isn't a way to easily convert it so our Exynos processors can use it. So for now, and maybe forever, Exynos phones can not use VoLTE (at least here in the U.S. for T-Mobile)
[Samsung Galaxy S7 Questions and Answers] Superaka:
Thank you so much for the reply POQbum. That cleared up a lot of questions for me. After getting LTE Discovery, I did notice my G930FD connecting to band 12 often. I did not realize VoLTE meant having LTE speeds over voice only. And I also wondered why my sister's T-mobile S6 consistently showed higher bars. Actually so far I've been enjoying my S7 duos, which is a definite improvement over using my old Verizon S6 on the T-mobile network. VoLTE and wifi calling are not essential for me, mainly data. I also had noticeable improvement switching to 4G only (H+, shows up as 2g/3g network mode option in my phone), in very congested areas of LTE.
[Samsung Galaxy S7 Questions and Answers] POQbum:
Yup VoLTE is basically when you use your LTE connection to talk in high definition voice. Basically just higher voice quality and it is using your LTE connection. With our phones it will simply revert back down to normal voice quality using HSPA+, which is the quality most people are limited to when you call them anyway.

> HSPA+ is classified as a 3G technology but T-Mobile has always argued it was their 4G. It is a very fast 3G (as long as your tower isn't congested), so it has 4G-like speeds, however our phones simply show HSPA+ instead of 4G, like T-Mobile devices like to show.

Glad all my phone knowledge has gone to good use :)
[Samsung Galaxy S7 Questions and Answers] clonk:
I think your above statement needs a bit of clarification. Reasonably, there should NOT be any difference in the international version's ability to "pick up" (receive) RF cellular phone signals. That's because the receiver function (including its rx sensitivity) is controlled by the phone's radio

receiver

circuitry, not by its transmitter. A full-duplex transceiver (which these phones utilize) can be limited to any number of power output levels without changing the sensitivity of the accompanying radio receiver. In other words, the receiver component of the international version's transceiver should have identical or similar sensitivity to the branded US versions. There is absolutely no reason for Samsung (or any other company) to reduce receiver sensitivity on any device because it has nothing to do with the near field RF radiation levels emitted by said device. It is therefore only the transmitter's maximum power output on the international version that may well be restricted due to regulation.
[Samsung Galaxy S7 Questions and Answers] :
Yes, I would like to see more proof of the statement of the intl versions having a weaker radio. I am more willing to believe its related to weak carrier signal, which in my neighborhood tmobile is lousy, -110 to -120 dbm to be exact. I had to switch both my sims (i have the 930fd) to att which is much better for some reason in my experience with this phone. I have a sony xperia z5 and tmobile with band 12 isnt any better at my location.
[Samsung Galaxy S7 Questions and Answers] clonk:
I have exactly the same problem with T-Mobile here. Its signal strength fluctuates from -108 dbm to as low as -120 dbm in the area of my residence. Both AT&T and Sprint provide a significantly greater LTE signal here.

Just to clarify, I mainly wanted to point out that government regulation would only dictate the maximum transmitter output power, not the receiver sensitivity.
[Samsung Galaxy S7 Questions and Answers] :
I had been complaining to t-mobile for years about their aws band 4 signal here. Things only improved after they refarmed 3g to the pcs band in my area but now back with LTE I constantly saw band 4 up to -120 dbm which is awful. Band 12 was no picnic either at around -100. Att is in the 90s which isnt too good either but its a big improvement compared to what I was dealing with t-mobile. Best I have ever seen this phone do with t-mobile is about -80 dbm. I used to think it was the phone but I have an HTC M8 and the Sony Z5 and they are all comparable with a t-mobile sim and a lot better when I swap for the att sim. Too bad because I now miss my Tuesday freebies. Lol
[Samsung Galaxy S7 Questions and Answers] POQbum:
Well I tested a Galaxy S7 T-Mobile and also a Galaxy S7 International with a T-Mobile SIM in the same spot and noticed a consistent but subtle difference in reception.

The most proof I can give you are the following specs:

SAR US	1.40 W/kg (head) 1.59 W/kg (body)

SAR EU	0.41 W/kg (head) 0.62 W/kg (body)

found on: http://www.gsmarena.com/samsung_galaxy_s7-7821.php

----

Specific absorption rate (SAR) is a measure of the rate at which energy is absorbed by the human body when exposed to a radio frequency (RF)

So it's logical to assume that since the US has a higher SAR rate it means that the radio frequency is stronger in the U.S. models than it is in the international models.

Also the above specs represent the combined receive and transmit radios. If you're interested, there are other websites that show the stats only for receiving but you should find that those are also lower on the international than they are on the U.S. models.

Of course I did also test both phones and they do have a slight difference with the T-Mobile version picking up a slightly stronger dBm strength than the international version. However with that said I still have not had any problems with reception on my international version which I use as my daily phone.
[Samsung Galaxy S7 Questions and Answers] clonk:
The problem is that a radio receiver does not put out much RF energy because it is not a transmitter. Sure, there are oscillators within receiving circuitry that generate some weak RF fields. But many of those oscillators are shielded (i.e., contained) and said RF fields are relatively minuscule anyway.

My main point is that desensitizing a receiver (i.e., making it deafer) will NOT reduce the RF field produced by a transmitter. A transmitter is a separate element and it's the only thing that contributes to dangerous RF absorption rates with respect to the human body. Moreover, for this same reason, it's certainly possible to reduce a transmitter's power output (causing the RF field that it produces to be less intense) without affecting an accompanying receiver's functional sensitivity. In fact, you don't even need a transmitter with a receiver circuit. It can strictly be a stand-alone receiving device and it can be a very sensitive one that produces no harmful RF levels whatsoever. Many portable receivers come in a stand-alone configuration and work extremely well with no health risks imposed upon the users.

Having stated the above, I believe it is true that some (or most) cell phones automatically

increase

their RF output power levels -up to the maximum they are permitted to put out- when the signals they are receiving from cell network towers become weaker. So, if anything, it may follow that a less sensitive cell phone receiver circuit may actually cause the phone's transmitter to put out

higher

,

more

absorbable

levels of RF radiation. Not the other way around.

In the end, a weaker transmitter should not need to equal a less sensitive receiver. If any of the European phones have less receiver sensitivity than their US counterparts, I can't imagine how it could be intentional to accord with safety regulations.
[Samsung Galaxy S7 Questions and Answers] POQbum:
Test the phones for yourself but the reception isn't the same.
[Samsung Galaxy S7 Questions and Answers] clonk:
I don't think I ever said it was the same, or even disagreed with you that there may be a difference. I only said that it would serve no practical purpose to reduce the receiver sensitivity on non-US phones if the goal is to merely keep the transmitter power output below a certain point. If the transmitter circuits on non-US phones were modified/adjusted to generate less power output, it simply should not reduce receiver sensitivity. That's all I'm saying. However, there is one thing they could have done that would negatively affect both receiver and transmitter efficiency. And that would be if they altered the internal antenna structure to the point that it were less resonant on the utilized frequencies. And that's because the device antenna structure is used for both incoming and outgoing radio signals. I seriously doubt they would do anything like that, though.
[Samsung Galaxy S7 Questions and Answers] Rishav25th:
I have purchased a galaxy s7 from dubai and now i am in india my model number is SM G930FD and my PDA is G930FXXU1APEQ. I am unable to use volte network and HD call i am only able to use 4g data .No volte sign is showing in my status bar and my phone doesnt have any setting regarding volte. So what should i do. Should i flash India firmware and if then how should i flash it i phone is not rooted .or there is any other easy process..Thanks in advance
[Samsung Galaxy S7 Questions and Answers] gaww:
I take it that none of the international f and fd's work on US TMo with WiFi calling?
[Samsung Galaxy S7 Questions and Answers] Wanabedev83:
Hi everyone I just wanted to point out that I was able to obtain Volte and WiFi calling on my G930FD while using "[Rom] FULL N7 Rom BASE PHA Now With VOLTE Support 9-4-16 by sac23" I just did a full wipe and installed only the rom and to my surprise all the normal speeds with the added bonus of volte and WiFi calling working 100% tested. Even the lte icon was similar to the tmobile one. And yes volte appeared on the screen. My speeds were 38/45 down with 20/25 up average so I think that if we can replicate whatever is working right on that Note 7 port maybe we can replicate on a stock rom? I Uninstalled it because it was kinda buggy and letters were too small but tmobile service was working perfect.
[Samsung Galaxy S7 Questions and Answers] GbizzleMcGrizzle:
You day Wi-Fi calling worked on yours? Because it didn't work for me.

Any ideas?
[Samsung Galaxy S7 Questions and Answers] tyrone1:
Just curious anyone able to get volte working on any non N7 rom on the g930F?

Definitely can get wifi calling to work on tmobile but can't get volte to work on superstock ROM.
[Samsung Galaxy S7 Questions and Answers] GbizzleMcGrizzle:
I haven't tried yet with three tmb acc but these N7 Roms have been giving me so many problems that umm going to try
[Samsung Galaxy S7 Questions and Answers] tyrone1:
I know wifi calling works fine on the super stock rom but volte doesn't.

Funny both worked fine for me on the n7 ROMs. I wanted to switch since the note 7 is scrapped probably won't be any updates for those ROMs anymore.
[Samsung Galaxy S7 Questions and Answers] GbizzleMcGrizzle:
That's good to know I mean volte it's nice but Wi-Fi calling is necessary and if I can get that with a stable Rom, week that's all I really need