Database Users

[Q] What is your FCC ID?

I'm curious how many hardware variations of the Defy exist with distinct FCC ID numbers. This would be a good complementary thread to the one with all the different 3G fix files.
So please state 1) the carrier you bought your phone from (or if not a carrier, the site you bought it from), 2) the network you use it on (if not the same) and its 3G frequencies, 3) The FCC ID number behind the battery of your phone. If there is no FCC ID, then any other numbers you can find.
If your phone has the same info as another already posted here, no need to re-post.
I don't own a Defy but let's start with the info stated here:
http://www.phonescoop.com/phones/phone.php?p=2965
1) T-Mobile USA, 2) N/A, AWS 3G, 3) IHDP56LC3
I have also found FCC reports of the following variations:
IHDP56LC1: WCDMA 850/1900
IHDP56LC2
IHDP56LC4
(not sure which bands on the latter two, had trouble finding the right testing docs)

1) eBay (T-Mobile USA branded)
2) AT&T (850/1900Mhz)
3) IHDP56LC3
IHDP56LC2: WCDMA 850/2100 (FCC website, Exhibit 11 RF Exposure Info)
IHDP56LC4: WCDMA 900/2100 (same above)

krazyazy said:
1) eBay (T-Mobile USA branded)
2) AT&T (850/1900Mhz)
3) IHDP56LC3
IHDP56LC2: WCDMA 850/2100 (FCC website, Exhibit 11 RF Exposure Info)
IHDP56LC4: WCDMA 900/2100 (same above)
Click to expand...
Click to collapse
Aha, good to know.
If the T-Mobile USA version (IHDP56LC3) has 850/1700/2100, it seems odd they'd have (presumably for Telstra) a hardware variant which is the same minus 1700 (IHDP56LC2). I wonder if this is genuinely different hardware or if they just fail to list the AWS band in the FCC tests?

1. Telstra
2. Telstra Next-G
3. FCC ID: IHDP56LC2

cmstlist said:
Aha, good to know.
If the T-Mobile USA version (IHDP56LC3) has 850/1700/2100, it seems odd they'd have (presumably for Telstra) a hardware variant which is the same minus 1700 (IHDP56LC2). I wonder if this is genuinely different hardware or if they just fail to list the AWS band in the FCC tests?
Click to expand...
Click to collapse
Agreed, it's seems odd that they would have 2 different hardware variants with the difference being only AWS. Guess the only way to test would be to have someone with a IHDP56LC2 Defy flash the USA fix and come over to the US to test.
This would all be easier if manufacturers started using the penta-band chips like in the Nokia N8.

Well, I have seen (on this forum?) pics of the US Defy running 3G on AT&T using the 850. If true, and the 2100 works in Europe (it does, BTW) then anyone would be seemingly better off with the US version.
Oh, here it is: http://androidforums.com/t/217819-t-mo-motorola-defy-working-t-3g-850-band-only.html

scrannel said:
Well, I have seen (on this forum?) pics of the US Defy running 3G on AT&T using the 850. If true, and the 2100 works in Europe (it does, BTW) then anyone would be seemingly better off with the US version.
Oh, here it is: http://androidforums.com/t/217819-t-mo-motorola-defy-working-t-3g-850-band-only.html
Click to expand...
Click to collapse
Well, *anyone* but:
- Customers on global carriers who require the 900 MHz band for good 3G coverage
- Customers on any carrier that has significant 1900-only 3G areas
Which leads to a question - can anyone here confirm they live in or have occasion to visit an area where AT&T's 3G coverage is only 1900 MHz, and no 850? You can verify this by bringing your Defy as well as a phone that does have 850/1900 3G, and seeing if you get 3G on the other but not the Defy.
If you can set up this kind of situation - take a nandroid backup of your firmware, and then try applying the "3G fix" for 850/1900. Is your phone now able to get 3G on 1900? If yes, then the bands are entirely software-controlled; if no, it's the hardware.
Or to the Australians out there with a Telstra Defy - do you have access to an Optus SIM card? Can you test out the Defy in a 900 MHz-only Optus coverage area, and then try flashing the "3G fix" for 900/2100... is your phone now able to get 3G on 900?

1) Bought from T-Mobile Direct (UK)
2) Network: T-Mobile (UK)
3) FCC: IHDP56LC4

All,
I live in Madagascar, after flashing US 3G fix, i've got 3g at home now. Before fix, in rom 3. 4. 3-11, i always don't have at home. But, oh yes there's but, the network signal is very poor. And i've lost it many times.
My Fcc id HDP56LC4.
Now i'm in 900-2100 fix and everything is right but in Edge lol 2G.
My carrier is Telma, 900 for Gsm and 2100 for 3g+ (Hspda). I've signal and 3g+ connection when i leave home for office, in the city.
Sent from my MB525 using XDA App

Hello I have purchased a Motorola Defy from e-bay off of kick mobiles in the UK it was already unlocked the FCC ID is :IHDP56LC4 900/2100(2.2.2) and I had it shipped to Canada..... much to my dismay it does not work on our basebands here..well it does on GSM 2G...anyway I found a Canadian one from Telus so i bought that one too and it's FCC ID is :IHDP56LC1 850/1900(2.2.1) hope this helps

I'm confused. When I go to the phonescoop page and click on the different FCC IDs IHDP56LCX where X is 1-4 the only one that is different is 3 where it has the 1700 band in addition to the 850/1900/2400?
I'm looking for a phone with hardware to support 850/1900 3g. can someone point me in the right direction?
Thanks,

If you want the one with 850/1900 3G, it's the one sold by Telus Canada, or in certain Latin American countries.
Sent from my HTC Glacier using Tapatalk

Thanks for the reply!
It seems really tough to pick up a defy with specific hardware because a lot of phones on ebay anyway are tmobile which apparently is 850/1700/2100 and could work with att but will not have the 1900 band or mb525 which is the international version which doesn't work with att?

For IHDP56LC2, seems to be almost all in one:
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Picture from this file, Federal Communications Commission website.

Questions go in the Q&A section

Step666 said:
Questions go in the Q&A section
Click to expand...
Click to collapse
Thanks for the necromove
Sent from my Galaxy Nexus using Tapatalk 2

I have a IHDP56LC4:
1. Bought from Germanos Romania (Cosmote - OTE owened)
2. Used with Vodafone (900, 2100 MHz)
3. FCC ID: IHDP56LC4

I have one Defy+ and the FCC ID is For IHDP56LC2, i switched basebands and i can connect to 850/AWS 3G bands, i'm looking for a compatible 1900mhz radio and baseband, i tried to change baseband but defy stays in Only Emergency calls.

intfranknet said:
I have one Defy+ and the FCC ID is For IHDP56LC2, i switched basebands and i can connect to 850/AWS 3G bands, i'm looking for a compatible 1900mhz radio and baseband, i tried to change baseband but defy stays in Only Emergency calls.
Click to expand...
Click to collapse
The ONLY reason for the baseband switcher is to fix firmware files that are meant for the wrong variant. The ONLY baseband you need is the one intended for your hardware. Nothing else will give you better results. The hardware cannot under any circumstances connect to bands it's not compatible with.
Sent from my Nexus 7 using Tapatalk HD

GSM Windows Phone 8 devices with LTE

This is only a simple summary I wanted to do about
There are many people who like to buy their smartphones from 3rd party vendors (ebay, and other on-line stores), so on.
Fortunately, there are several smartphones start with support for LTE networks
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CANADA, U.S. (At&t, T-MOBILE), MEXICO (TELCEL), ARGENTINA (MOVISTAR), URUGUAY (ANTEL), PUERTO RICO (at&t), ETC.
To date are only four models of Windows Phone 8 with support for LTE networks in BC4 (the LTE Band Class 4, is the key band in many operators in America, but not to all) , whose band is used for LTE in Canada, Mexico Telcel LTE and the upcoming LTE network fron TMoUS
Should be mentioned that at&t has the license for the BC4, but not yet implemented (at least commercially), and so far at&t only uses its LTE in BC17 (the band 17 should not interest anyone outside of at&t). Even so, the at&t´s LTE devices releases are still very relevant to another countries like Mexico and another some countries in Latin America, becauser ther LTE devices that are made for at&t in addition to the band 17, also include support for LTE in the band 4, which is the band that is used by several american carriers. LTE devices from Canada work also in BC4
WP DEVICES WITH LTE IN BC4:
For now, WP8 devices supporting LTE Band 4, are:
-HTC Windows Phone 8x (check that it is the GSM version with LTE in BC4, not to be confused with Verizon´s HTC 8x, nor the global version without LTE). There are variants of 8Gb and 16Gb of storage.
-Samsung Ativ S GT-i8750 (not to be confused with the version GSM/CDMA). With variants of 16 or 32 GB of storage
-Nokia Lumia 920.2 [RM-820]. Not to be confused with the Lumia 920 RM-821 which supports other LTE bands (European and others)
-Nokia Lumia 820.2 [RM-824]. Not to be confused with the Lumia 820 RM-825 which has European and other LTE bands
Specifications:
http://pdadb.net/index.php?m=pdacomparer&id1=3808&id2=3814&id3=3914&id4=3985&id5=3906&id6=3860
At the moment, I have no information if some trick is needed to operate the LTE in another network for which it was designed, (of course, assuming that both the device and the network has the appropiated LTE band, but the smartphones mentioned meet the requirement of hardware essential to be able to function in carriers with LTE LTE in BC4
For example, so far, I know the requirements to enjoy the LTE if the device was not purchased with the operator (Telcel Mexico case for now, but can serve as a reference for other operators):
-A unlocked device, which support the band LTE 4 (or AWS LTE, which is the same)
-Being in an LTE coverage area
-A Version 6 SIM Card
-Postpaid plan
-That the operators´s system enable your cell phone line as "LTE user"
-May or may not, be needed a minor operation, as in the case of the Nexus 4 you have to enter a service menu to change settings related to LTE (like Nexus 4); or edit the APN settings (like as was done with the 3G)
Europe
In Europe, LTE bands are used:
BC7 (this is in 2600MHz) used for LTE in most countries of the EU; Australia, etc
BC20 (this is in 800MHz) some European countries already in use as in France, Germany, etc.. (although in the same territory also use BC7); Australia
BC3 (this is in 1800MHz). Only a few countries use this as LTE band are: Belgium, Denmark, Finland, etc (although in the same territory also use BC7 and BC20). Australia uses BC3 too.
WP8 DEVICES THAT HAVE LTE IN BC7, AND LTE IN BC20:
Lumia 920 [RM-821], not to be confused with the American version.
Lumia 820 [RM-825], not to be confused with the American version.
UPDATE: Added:
-HTC 8X LTE C625b (LTE BC7 and LTE BC3)
Specs:
http://pdadb.net/index.php?m=pdacomparer&id1=4039&id2=3859&id3=3858
Note: Some Latin American operators are deploying LTE networks in LTE frequency BC7, as Entel in Chile, UNE in Colombia, so they falls in the second case (European style)
sorry for my bad english

In many European countries networks are already operational on 2600 Mhz. Some countries are allowing refarming of spectrum in the 1800 Mhz range. Some have already deployed in the spectrum of the digital dividend (switch to DVB-T) at around 800 Mhz, while other countries still have not given away those frequencies. It is safe to assume that most european networks will operate on a Mix of 800/2600 or 1800/2600.
The european versions of the Lumia 820/920 to my knowledge should support all three of those bands.

[Q] SM-N910F

Does anyone know if the SM-N910F will get LTE service on AT&T in the United States?

I am looking for a definite answer as well from someone who has the F or the C. I would rather go with Internation if I am going to bring my own phone to AT&T

Has anyone seen/read any confirmation if a the N910F or N910U will work with the AT&T Network? I currently have the AT&T N910A and have only till the 25th to return it; phone cannot be rooted at this time and don't want to be stuck with it.
I'm reading conflicting reports saying the the N910U will work with AT&T, the N910C is exynos based and would like a Qualcom based version.

I ended up purchasing a SM-N910F. While it does work on the AT&T network I am getting 4G connectivity but no LTE indicator.

Phurious said:
I ended up purchasing a SM-N910F. While it does work on the AT&T network I am getting 4G connectivity but no LTE indicator.
Click to expand...
Click to collapse
4G=LTE

henklbr said:
4G=LTE
Click to expand...
Click to collapse
Not so sure . . .
My Galaxy Note 3:
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And the SM-N910F from the same location:

Phurious said:
Not so sure . . .
My Galaxy Note 3:
And the SM-N910F from the same location:
Click to expand...
Click to collapse
On your Note 4, can you go to mobile networks and change it to GSM only, then run another test and compare.
I think your Note 4 is running on HSPA+ only.

Phurious said:
Not so sure . . .
My Galaxy Note 3:
And the SM-N910F from the same location:
Click to expand...
Click to collapse
Look at my speedtest in signature: the Vodafone one is on 4G
You've the -F- (European) version of the Note 4; maybe your Note 3 is operating on a different (faster) LTE/4G band that is not supported on your Note 4!

Phurious said:
Does anyone know if the SM-N910F will get LTE service on AT&T in the United States?
Click to expand...
Click to collapse
I found this thread and was able to modify the frequency settings on my SM-N910F.
http://forum.xda-developers.com/galaxy-s5/general/how-to-add-rf-lte-frequency-bands-to-t2886059
Even though I still do not get a "4G LTE" icon in the status bar when I run LTE Discovery and SpeedTest the SM-N910F is matching my AT&T SM-N900A.

4G configuraciom
Phurious said:
I found this thread and was able to modify the frequency settings on my SM-N910F.
http://forum.xda-developers.com/galaxy-s5/general/how-to-add-rf-lte-frequency-bands-to-t2886059
Even though I still do not get a "4G LTE" icon in the status bar when I run LTE Discovery and SpeedTest the SM-N910F is matching my AT&T SM-N900A.
Click to expand...
Click to collapse
Hola para poner la 4 G ES FASIL SI ES CLON CHINO PON *#*#9228*#*# Entras adentro y cambia a 4g

henklbr said:
4G=LTE
Click to expand...
Click to collapse
Sorry Bro, but 4G does not equal LTE. At least not in the US. A while back when 4G was an upcoming technology, carriers started pushing updates to the phones that made the phone display 4G even though it was actually running HSPA+ (3.5G). When LTE came out, the phones would still either display 4G or would display 4G LTE or just LTE. The only true way to tell if your phone is recognizing the LTE network is in your "About Device" Status screen under Mobile Network Type/State. That will tell you which network you are connected to, whether it be EDGE(2G), HSDPA(3G), HSPA+(3.5G/4G), or LTE(4G LTE).
AT&T is pretty tight lipped about their service. I have received many different answers depending on who you talk to at AT&T. The only thing I can suggest is to put the AT&T sim card it and make sure you have the APN configured correctly. The European model of the Note 4 actually has more LTE bands than the AT&T model. For quick reference, wikipedia states that AT&T in the US uses 2, 4, and 17.
Off of Samsung US for Note 4 AT&T:
SM-N910A - B2(1900) / B4(AWS) / B5(850) / B12(700) / B17(700)
Off of Samsung UK for Note 4 Europe Unlocked:
SM-N910F - B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B17(700), B20(800)
Interesting to note that the AT&T Note Edge has almost all the same LTE bands as the European Note 4.
Off of Samsung US for Note Edge AT&T:
SM-N915A - B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B17(700), B20(800)
So with that being said, just because it uses the same bands, doesn't mean that it will function properly on another carrier's network.
So, if you are having issues getting LTE, then you may be in an area that strictly uses Band 12 or there is a configuration issue somewhere. I would get with AT&T and hash out the configuration issue and AT&T will help you out if you bring an unlocked phone to their network. More often than not, it's an IMEI issue. Their IMEI to LTE database is very rigid and if I recall correctly only has the IMEIs for AT&T phones and no others. A bit closed minded in my opinion, but they won't change it.
Now, with all that being said, I want to make something perfectly clear. AT&T does not guarantee LTE service, even on their own phones. Though with the AT&T variation you will get LTE more often than the European variation. Doesn't seem like it would work that way, but that's why AT&T has their variation. It's been vetted by AT&T.

New Verizon Motorola Droid Turbo 32GB Clean ESN Black Ballistic Nylon Unlocked

Hi ive just Won this device on Ebay,
I live in Denmark(Europe)
Clean ESN do any of you know what it means?
Also isn´t this an global device? Talked to Motorola support and they couldn´t promise me that it would work in Europa as it was Verizon only device?'
To me it sounds like BS
But now i worry if it can be used in my network
Thnx all

SuperBilleN said:
Hi ive just Won this device on Ebay,
I live in Denmark(Europe)
Clean ESN do any of you know what it means?
Also isn´t this an global device? Talked to Motorola support and they couldn´t promise me that it would work in Europa as it was Verizon only device?'
To me it sounds like BS
But now i worry if it can be used in my network
Thnx all
Click to expand...
Click to collapse
Cleasn ESN: The jist of it, is it not blacklisted on Verizon, It can be activated, in other words.
It is a Verizon exclusive unlocked global device (which technically isnt true anymore due to Moto Maxx). It will work as long as it supports your carrier's frequencies.

SuperBilleN said:
Hi ive just Won this device on Ebay,
I live in Denmark(Europe)
Clean ESN do any of you know what it means?
Also isn´t this an global device? Talked to Motorola support and they couldn´t promise me that it would work in Europa as it was Verizon only device?'
To me it sounds like BS
But now i worry if it can be used in my network
Thnx all
Click to expand...
Click to collapse
You understand that Europa is one of Jupiters moon's, right?

thegrants82 said:
You understand that Europa is one of Jupiters moon's, right?
Click to expand...
Click to collapse
It'll work there too as long as Europa carriers are transmitting on LTE bands 2, 3, 4, 7, 13.
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2G bands
GSM 850 / 900 / 1800 / 1900
CDMA 800 / 1900
3G bands
HSDPA 850 / 900 / 1900 / 2100
CDMA2000 1xEV-DO
4G
LTE: 700 / 1700 / 1800 / 2100 / 2600 (Bands 2, 3, 4, 7, 13)
Code name for Droid Turbo/Moto Maxx is QUARK -- so of course it was made for space travel.

Actually, Moto Maxx is GSM only and has LTE bands 2, 3, 4, 7, 17.
Droid Turbo is GSM/CDMA with LTE bands 2, 3, 4, 7, 13.

thegrants82 said:
You understand that Europa is one of Jupiters moon's, right?
Click to expand...
Click to collapse
How is this relevant? LOL
Anyways clean ESN means is safe to activate on any compatible network because the first buyer did not default on his contract. I think this would only affect it if you were to activate it on Verizon (USA) not sure tho.

MauricioBR said:
Actually, Moto Maxx is GSM only and has LTE bands 2, 3, 4, 7, 17.
Droid Turbo is GSM/CDMA with LTE bands 2, 3, 4, 7, 13.
Click to expand...
Click to collapse
He said he won the Droid Turbo. I gave the specs for the Droid Turbo. So, I'm not sure what you are correcting.
But if you want to talk Moto Maxx, I'll correct you. The Moto Maxx (XT1225) has LTE bands 2, 3, 4, 5, 7, 17 -- in spite of what Motorola lists on the "official" specs. I know because the NV bands show it. I own two Moto Maxx phones.
The phone with the Moto Maxx FCC ID went through FCC testing with LTE band 5, and Motorola never disabled it. They added LTE band 3 to sell in Latin America. They do not list LTE band 5, but when you root and scan with QPST and QXDM sofware you see it's there.
FCC Documents. Note the FCC ID.
Same FCC ID:
Discussed extensively in another thread. Present on both the Puerto Rico and Mexico Moto Maxx phones. Since the same FCC ID number is also listed on Brazil Moto Maxx, it's all Moto Maxx phones.
Using the NV bands calculator, the sum for LTE bands 2, 3, 4, 7, 17 should be 65,614. But we have 65, 630. The only combination that gives you 65, 630 is LTE bands 2, 3, 4, 5, 7, 17 -- which makes sense since LTE band 5 was enabled when it was tested by the FCC.
It's still there, ready to be used. Jut not admitted by Motorola since LTE band 5 is not used in Latin America. To make the phone be the Moto Maxx (XT12225 )for Latin America, Motorola added LTE band 3, added two more GSM bands -- but never disabled LTE band 5.
Even in the equivalence letter, Motorola never stated all the LTE bands the FCC found:

ChazzMatt said:
Click to expand...
Click to collapse
I'm not exactly familiar with LTE bands and such, but does that mean that the Moto Maxx will work with CDMA networks such as Verizon, too?

Sometimes I think its a good idea to make separate threads for these 2 devices. I would really help avoid these confusions.
Sent from a DROID.

ChazzMatt said:
He said he won the Droid Turbo. I gave the specs for the Droid Turbo. So, I'm not sure what you are correcting.
Click to expand...
Click to collapse
Hahah, sorry. My comment was more towards @adrynalyne who had said it wasn't true anymore that it's a verizon exclusive.
My understanding is that the modem is still different, as not all bands are mentioned on the declaration of equivalence.

G950F on T-mobile

So i'm probably about to pull the trigger on this phone because i'm sure it'll work fine on T-mobile, but upon researching, it looks like we could be missing LTE band 66.
"When it comes to T-Mobile, we’re focused on the LTE bands 2, 4, 12, and 66, the last of which is a newer band that T-Mo will be using for LTE coverage."
http://www.tmonews.com/2017/03/samsung-galaxy-s8-hits-fcc-support-lte-band-66/
As for international G950F, these sites cite bands 2, 4, & 12.. but no 66. Considering 2, 4, & 12 handle most of the coverage and that 66 is a newer band I don't think this is an issue at all. Besides my pixel has the same bands, sans 66 and I have great coverage.
https://www.frequencycheck.com/models/AabYB/samsung-sm-g950f-galaxy-s8-td-lte-samsung-dream
http://www.willmydevicework.com/device/samsung-sm-g950f-galaxy-s8-td-lte
I know the international S7 worked fine here in the US, but I had ATT back then. If anyone else has a G950F on Tmobile here in the US, please posts results so we can establish a consensus that LTE coverage is not an issue.

The F model supports band 66 according to the FCC filing . The sites you are using are not accurate.
https://apps.fcc.gov/eas/GetApplicationAttachment.html?id=3292120

clubtech said:
The F model supports band 66 according to the FCC filing . The sites you are using are not accurate.
https://apps.fcc.gov/eas/GetApplicationAttachment.html?id=3292120
Click to expand...
Click to collapse
Does this go the same for the FD model?

clubtech said:
The F model supports band 66 according to the FCC filing . The sites you are using are not accurate.
https://apps.fcc.gov/eas/GetApplicationAttachment.html?id=3292120
Click to expand...
Click to collapse
I'm still unclear as to whether or not the FCC model "G950U" is the G950F or a US carrier version, but i have read several references to the FCC model being "unlocked", so maybe it is.

TehPirate_ said:
Does this go the same for the FD model?
Click to expand...
Click to collapse
FD model supports the same bands as the F model.
---------- Post added at 02:39 PM ---------- Previous post was at 02:38 PM ----------
Chronzy said:
I'm still unclear as to whether or not the FCC model "G950U" is the G950F or a US carrier version, but i have read several references to the FCC model being "unlocked", so maybe it is.
Click to expand...
Click to collapse
The U and F models are two different models.
The F/FD are international unlocked version.
The U model is the US model (locked or unlocked) and has a different FCC certification.
It also support mode LTE bands and carrier aggregation options for the US.

Not sure in F supports WiFi calling...

Does the US model support all US Carrier frequency bands? I'm curious because once I'm done paying my phone off on sprint I would like to unlock it and bring it to t-mobile. I also ask because I read that the US version of the S8 are the same no matter the carrier....

XBlackChaosX said:
Does the US model support all US Carrier frequency bands? I'm curious because once I'm done paying my phone off on sprint I would like to unlock it and bring it to t-mobile. I also ask because I read that the US version of the S8 are the same no matter the carrier....
Click to expand...
Click to collapse
Not sure about that. Sprint is CDMA and T-mobile is GSM. Typically not compatible.
clubtech said:
The U and F models are two different models.
The F/FD are international unlocked version.
The U model is the US model (locked or unlocked) and has a different FCC certification.
It also support mode LTE bands and carrier aggregation options for the US.
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Well i'd figure any model made for the US market would have 66.. The international G950F was the one in question. And it looks like I answered my question with a little more digging. This test report from the FCC for the G950F confirms band 66 along with, from what I can see every necessary LTE band for both ATT and Tmobile. See "4.6 EUT Description" https://apps.fcc.gov/eas/GetApplicationAttachment.html?id=3292314 It also references some CDMA bands so maybe you can switch from Sprint to GSM carrier.. idk.

Chronzy said:
Not sure about that. Sprint is CDMA and T-mobile is GSM. Typically not compatible.
Well i'd figure any model made for the US market would have 66.. The international G950F was the one in question. And it looks like I answered my question with a little more digging. This test report from the FCC for the G950F confirms band 66 along with, from what I can see every necessary LTE band for both ATT and Tmobile. See "4.6 EUT Description" https://apps.fcc.gov/eas/GetApplicationAttachment.html?id=3292314 It also references some CDMA bands so maybe you can switch from Sprint to GSM carrier.. idk.
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I too did some digging in regards to band 66 support on the international model. The phone doesn't directly support the band from my understanding but has the hardware to interact with band 66 frequencies. This in returns grants band 66 compatibility at band 42 or similar. This is just my interpretation and could be wrong but best I've come up with thus far.
edit: To help backup my claim: http://niviuk.free.fr/lte_band.php
Band 66 utilizes the 2100Mhz spectrum and according to a T-mobile rep:
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955FD has band 66- BUT
The 955 FD (presume also 955F and 950FD and 950FD) has band 66. Tested on Freedommobile (Wind) Canada
BUT
If it takes a phone call it drops to wcdma band 4, and does not return to band 66 LTE.
I must toggle LTE/WCDMA/GSM to WCDMA/GSM and back to LTE/WCDMA/GSM to get band 66 LTE working again,
Your argument as to this is the fault of Freedomobile or Samsung. Some other phones but not 95xFx have had a firmware fix here on XDA.
Could a utility be written to do this?
If someone can solve this I might even root my S8+ 955FD!