Hi there
We have a nice discussion here at my work.
We are wondering if a carrier company can modify the LTE bands of some smartphones via software (firmware update, eprom mdification or something like that).
For example, our carrier has the same frequencies for CDMA/3G and LTE as Sprint and U.S. Cellular but different LTE bands.
Our LTE band been the number 2 and SPRINT number 25 (I don't know U.S. Cellular LTE Band).
So if is possible for our carrier to get some of these second hands smartphone and with some permission from someone modify the bands or the bands is something done at SOC/Modem Level?
Hope you understand the question.
Regards
I'm on T-Mobile, but I would rather buy the International version of the S7 to eliminate bloatware and to have the Exynos processor, not to mention the unlocked S7 is cheaper. However, I would like to use VolTE and Wi-Fi calling too. Will I have these features if I buy the international unlocked version?
Cloudrift said:
I'm on T-Mobile, but I would rather buy the International version of the S7 to eliminate bloatware and to have the Exynos processor, not to mention the unlocked S7 is cheaper. However, I would like to use VolTE and Wi-Fi calling too. Will I have these features if I buy the international unlocked version?
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Click to collapse
I've never had any of my unlocked phones support WiFi calling or VoLTE, only T-Mobile branded phones did.
you will probably have to flash the t-mobile roms from your country (I guess states?!). If you get a exynos S7 and some t-mobile usa branded roms for that VoLTE and WiFiCalling shouldn't be a problem. Getting those roms for the SM-G930F might be your biggest problem.
-Acid
How readily will the roms be available? I remember doing it for my HTC One M7 a few times and it wasn't too bad.
I also thought some phones like the Nexus 6P supported VoLTE and Wi-Fi Calling on T-Mobile?
The intl version does not have band 12, wifi calling on TMO, or VoLTE support on TMO.
Don't do it.
Thanks.
Sfkn2 said:
The intl version does not have band 12,
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wow really, man i really thought it had band 12...you sure it doesnt have band 12????? :good:
i couldve sworn i saw band 12 listed for the g930f and g935f
el7145 said:
wow really, man i really thought it had band 12...you sure it doesnt have band 12????? :good:
i couldve sworn i saw band 12 listed for the g930f and g935f
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Technology GSM / HSPA / LTE
Frequency Bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (optional) ; HSDPA 850 / 900 / 1900 / 2100 ; LTE
Speed 4G
GPRS Yes, Class 12
EDGE Yes
http://www.knowreviewtip.com/specs-price/samsung-galaxy-s7-edge-sm-g935f/
https://www.frequencycheck.com/models/Ak5yr/samsung-sm-g935f-galaxy-s7-edge-lte-a-samsung-hero-2
EDIT: you can also check on ebay, the major sellers of the g935f and g930f all list band 12
oh yeah, and finally, heres the actual samsung product page
http://www.samsung.com/uk/consumer/mobile-devices/smartphones/galaxy-s/SM-G935FZDABTU
so, there it is...the g935 has band 12...unless samsung is wrong?
Man, those sites provide confusing answers because there's one g935f owner on this forum who has T-Mobile who said it doesn't support VoLTE and Wi-Fi calling.
scottjb said:
I've never had any of my unlocked phones support WiFi calling or VoLTE, only T-Mobile branded phones did.
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That's because t mobile used to add their specific code to their phones' firmware. But now they're built into android so they may work.
aptalca said:
That's because t mobile used to add their specific code to their phones' firmware. But now they're built into android so they may work.
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When you state now they're built in, do you mean in Marshmallow?
I remember reading that's how the Nexus 6p gained the ability to use band 12 LTE support.
http://www.tmonews.com/2015/12/some...nd-12-lte-support-after-android-6-0-1-update/
Unbranded versions of the firmware do not support VOLTE for some inexplicable reason (the feature is there, just hidden), while some carriers do, they even use the same firmware with only a CSC change (like unbranded the XEF French unbranded firmware vs French Bouygues BOG firmware)
There is no T-mobile USA firmware for the Exynos/international variant but there are plenty of European carrier that handle VOLTE and have no branding, just flash the respective firmwares or CSC using ODIN (does not trip knox) which will enable the feature (you may need to perform a factory init to apply the CSC change)
I'm using the latest XEF firmware in my s6 intl 920F. Where do you get the csc to flash to enable these features?
scottjb said:
When you state now they're built in, do you mean in Marshmallow?
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That's right. Not sure about volte, but the wifi calling was added to marshmallow: http://www.phone-probe.com/android-m-features-native-wifi-calling/
aptalca said:
That's right. Not sure about volte, but the wifi calling was added to marshmallow: http://www.phone-probe.com/android-m-features-native-wifi-calling/
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That's for nexus devices, Samsung only enables WiFi calling on carrier branded ROM's.
If you buy the unlocked international version, you will not get VOLTE or WiFi calling. You will get band 12.
Sent from my Pixel C using Tapatalk
clubtech said:
That's for nexus devices, Samsung only enables WiFi calling on carrier branded ROM's.
If you buy the unlocked international version, you will not get VOLTE or WiFi calling. You will get band 12.
Sent from my Pixel C using Tapatalk
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Isn't this the first Samsung phone that comes with marshmallow?
Before marshmallow, wifi calling had to be added by the carrier to their rom like t-mobile did on moto and samsung phones.
I don't know for sure, just speculating
Can anyone actually confirm who had the Intl version that volte doesn't work
aptalca said:
Isn't this the first Samsung phone that comes with marshmallow?
Before marshmallow, wifi calling had to be added by the carrier to their rom like t-mobile did on moto and samsung phones.
I don't know for sure, just speculating
Click to expand...
Click to collapse
I don't have the s7, but I did have the international note 5. When i received the marshmallow ota, a volte icon appeared in the quick toggles bar. When i tried to click it to turn volte on an error message popped saying that carrier is not supported. I tried both with a T-Mobile and at&t sim.
The s7 may be different, but I highly doubt it.
Sent from my Nexus 6P using Tapatalk
Question is quite straight forward, does anyone have the specifacations of the s7/s7 edge radios that are being used? I'm curious as if the new LTE band released by freedom mobile being AWS-3 band 66 can be added via QXDM or DFS which I believe I used for my S4 in the past to unlock the bands for wind's frequencies on a rogers device due to the radio firmware did not contain the support.
The important question is the hardware capable of the capability, the S8 shows that it supports Band 66/AWS-3 and may contain the same radio as used in the s7 if not similar.
First of all... I'm not asking if I can unlock and root the Verizon version... I'm asking if any of the unlocked versions of the phone will work on Verizon. Without affecting the cellular service at all.
The SM-N975F has an Exynos processor and supports 3G TD-SCDMA: B34(2010), B39(1880), which are also supported by the Verizon version. However, the Verizon version supports 2G bands that the Exynos version does not.
Do I still need to worry about the 2G bands (CDMA: CDMA800, USPCS1900) that are exclusive to the Snapdragon versions? Maybe that depends on my geographic location. Does anyone know if there's a map to see if there is full 3G coverage where I live/work/play... such that I can make phone calls on all the 3G or 4G bands that the exynos version(s) support?
Thanks
I want to purchase a GW4 classic LTE from usa and use it in India.
I understood that it should be possible because the hardware should remain same irrespective of the region/country?
This is so with smartphones also because a samsung phone will be compatible with mobile carriers globally.
Region specific firmware is just to enable/disable settings or apps.
Please correct if my understanding is wrong.
My T-Mobile LTE watch 4 did not connect to any network, neither in Europe nor in India. When checked with TMO I was told that LTE connectivity will work only in the US, despite my having international roaming. Why so, no idea.
The LTE frequency bands are different.
Only Roaming 3g in Mexico and Canada had worked on my prior Samsung T-Mobile LTE watch's. Haven't traveled yet with my watch 4 LTE....