Database Develop

[Q] AT&T LTE Band 17, Anyone got it Working on Verizon Droid Turbo?

OK, so I have searched around in these forums, found the thread where some people were able to unlock some bands for the MOTO MAXX XT1225. However, I just want to verify before I return the hastily bought Droid Turbo from Verzion (XT1254): has anyone had success unlocking LTE Band 17 to use on AT&T here in the states? Right now, it's the only issue I have with the device. I get HSPA+ no problem, phone calls, etc but LTE eludes me. I live in Durham, NC and I verified on my old phone that I use band 17 for LTE.
Yes, I know I should've researched more but hey, some guy on youtube said it works and apparently thats all I need to buy a phone. (Especially at the decent price of $550 for the 32GB)

This is job for @ChazzMatt and his knowledge of bands

There is no proof I have seen of being able to enable any extra bands on any of the Quark series. The only bands I have seen confirmed to work are the ones already enabled in the phone.
Based on FCC info there is no reason to believe the XT1254 supports band 17 LTE. I am quite sure there is nothing you can do to enable it. The XT1254 and XT1225 do share band 2 and 4 LTE hardware but the rest of the LTE hardware is different.

Steve-x said:
There is no proof I have seen of being able to enable any extra bands on any of the Quark series. The only bands I have seen confirmed to work are the ones already enabled in the phone.
Based on FCC info there is no reason to believe the XT1254 supports band 17 LTE. I am quite sure there is nothing you can do to enable it. The XT1254 and XT1225 do share band 2 and 4 LTE hardware but the rest of the LTE hardware is different.
Click to expand...
Click to collapse
Yeah, other phones have had LTE and HSPA bands enabled, but usually it was bands which are enabled in the same device in other regions -- like Galaxy S5 European bands for USA or vice versa. The modem and firmware supports those bands, but Samsung had certain bands locked down or enabled, depending on where the phone was sold.
People have been unable to enable European LTE band 20 on the Moto Maxx XT1225 because no Quark phone has that band anywhere.
HOWEVER, LTE band 17 is enabled in all XT1225 Quark phones... so could LTE band 17 be enabled in the XT1250 (U.S. CDMA/LTE Moto Maxx/XT1254 (Droid Turbo) ? Theoretically, is possible, but I'm not going to say yes.
I delved into all this deeply months ago to try to enable LTE band 5 on the XT1225 -- since it was found by FCC certification tests, but Motorola didn't list in the Latin America specs when released. Then, after doing a whole bunch of work and confirming with the NV calculator dev, LTE band 5 was already enabled as was HSPA band 4 (for T-mobile). So, while knowledge is always useful, all my work was not necessary.
When the Moto Turbo XT1225 was released (same model number, same FCC ID, same SKU), Motorola FINALLY listed all the bands that are enabled.
@Steve-x is correct. Up to this point in time, no one has enabled LTE bands that are not already enabled. Still, LTE band 17 is theoretically possible since all the Quarks share the same Snapdragon 805 modem, and some do have LTE band 17.
In a similar way, many many people have enabled LTE band 3 on the Nexus 5 D820 and enabled LTE bands 2 and 4 on the Nexus 5 D821. I'm going to do that soon for my wife's Nexus 5, as we are going to Brazil this summer.
[Radio] Enable LTE Band 3 and 8 on D820 and LTE Band 2 and 4 on D821
http://forum.xda-developers.com/google-nexus-5/general/radio-enable-lte-band-3-nexus-5-d820-t2928561
Google has two Nexus 5 phones, with different FCC ID, different bands enabled due to being sold in different parts of the world. People have been able to enable LTE bands Google locked down.
MORE:
[GUIDE] Add all GSM and LTE bands to your phone
http://forum.xda-developers.com/galaxy-s5/general/how-to-add-rf-lte-frequency-bands-to-t2886059
[GUIDE] UNLOCK ADITIONAL BANDS FOR QUALCOMM DEVICES <OnePlus One EDITION>
http://forum.xda-developers.com/oneplus-one/general/guide-unlock-aditional-bands-qualcomm-t2877031
Unlock all bands of your Qualcomm device! Use your phone globally! No bs!
http://forum.xda-developers.com/cro...ad-progress-please-leave-im-updating-t2871269

Thanks for the help guys. After thinking about it some more, if I wasn't paying full retail out of pocket and I didn't have a special return window with Verizon, I'd probably give this a shot.

XT1250 on AT&T LTE Band 17
It seems the XT1250 and XT1254 are counterparts -- I just purchased a XT1250 thinking Band 17 was enabled, but only getting HPSA+ and no LTE.
Any luck, thoughts, etc on this lately?
THANKS

KeepingItCuttingEdge said:
It seems the XT1250 and XT1254 are counterparts -- I just purchased a XT1250 thinking Band 17 was enabled, but only getting HPSA+ and no LTE.
Any luck, thoughts, etc on this lately?
THANKS
Click to expand...
Click to collapse
Not "counterparts", identical devices. The XT1250 (U.S. Moto Maxx) = XT1254 (Droid Turbo). Same FCC ID, same bands, same exact device. Since the XT1254 does not have LTE band 17, neither does the XT1250. The XT1250 is basically the dev version of the XT1254, with unlockable bootloader via Motorola website like the other Quarks.
While all the Quarks share the same hardware, including antenna, the radios are different. The XT1225 has a different FCC ID because it does have different radio.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
The XT1250/XT1254 has CDMA bands which the XT1225 does not have or need. The XT1225 has more HSPA bands, different mix of LTE bands and more LTE bands. All Quarks share LTE bands 2, 3, 4, 7. But the XT1250/XT1254 has LTE band 13, while the XT1225 has LTE bands 5 & 17, plus more HSPA bands.

Can you get Lollipop update not on Verizon network?

Since Verizon phones are auto-unlocked and the Droid Turbo has AT&T LTE bands, I was considering buying this phone but my only worry is - will the phone get the Lollipop update if I'm not on the verizon network?
Also, I heard MMS is a little wonky if you're not on the verizon network as well, is this true?

I guess you can find the official update file and flash it through the stock recovery
That's how I updated my Turbo before the update was available through the normal update menu.

Droid Turbo will get updates with any or no sim card. it is not dependent if you have any sim or verizon sim.

karuptx said:
Since Verizon phones are auto-unlocked and the Droid Turbo has AT&T LTE bands, I was considering buying this phone
Click to expand...
Click to collapse
Droid Turbo XT1254 does not have all the AT&T LTE bands. Has 2, 4, 17 but not LTE band 5 (now used in some locations). Just like it also doesn't have all the T-mobile LTE bands. Doesn't have LTE band 12.
Moto Turbo and Moto Maxx (XT1225) has 2, 3, 4, 5, 7, 17 -- ALL the AT&T LTE bands.
That may or may not matter to you, depending on if you need LTE band 5.

ChazzMatt said:
Droid Turbo XT1254 does not have all the AT&T LTE bands. Has 2, 4, 17 but not LTE band 5 (now used in some locations). Just like it also doesn't have all the T-mobile LTE bands. Doesn't have LTE band 12.
Moto Turbo and Moto Maxx (XT1225) has 2, 3, 4, 5, 7, 17 -- ALL the AT&T LTE bands.
That may or may not matter to you, depending on if you need LTE band 5.
Click to expand...
Click to collapse
How do you know what bands you need?

ChazzMatt said:
Droid Turbo XT1254 does not have all the AT&T LTE bands. Has 2, 4, 17 but not LTE band 5 (now used in some locations). Just like it also doesn't have all the T-mobile LTE bands. Doesn't have LTE band 12.
Moto Turbo and Moto Maxx (XT1225) has 2, 3, 4, 5, 7, 17 -- ALL the AT&T LTE bands.
That may or may not matter to you, depending on if you need LTE band 5.
Click to expand...
Click to collapse
6Binford said:
How do you know what bands you need?
Click to expand...
Click to collapse
There's not an easy answer for that.
This site has some good information, but you have to know how to filter for what you need:
https://www.cellmapper.net/map
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Would be great if there were a USER FRIENDLY LTE bands coverage map, not showing just LTE coverage but also showing which BANDS are being used. I cannot find that anywhere.
The FCC has a resource to show frequencies used by a carrier, but you have to convert that to bands yourself, and it's not user friendly:
https://forums.att.com/t5/Network-Coverage/LTE-bands-and-coverage/td-p/4259614
http://reboot.fcc.gov/reform/systems/spectrum-dashboard
this is about the only way. There are some apps like opensignal you can download to your phone and check the area. I know vermont is all band 5 for the most part. Here in IL I get band 4,5,17 only my 35 min commute to work.
Click to expand...
Click to collapse
Open Signal has an app that collects crowd sourced information -- including bands -- but then just displays it as "4G" coverage, again not breaking down which LTE bands are being used in a specific area.
I use LTE Discovery app. It shows me which band I'm on and what the signal strength is. But if my XT1225 didn't already have all the LTE bands for AT&T, how would I know what I am missing?

Yes, you can. I have friends overseas with turbos and they all received lollipop.
Sent from my XT1225 using Tapatalk

Dorid turbo Xt1254 unlock FDD-LTE band1

Hello,
As I'm gonna to use moto dorid turbo in China, my Carrier, China telecom required for lte band 1. I'd like to learn about some useful ways to unlock Lte band1 in order to use it....................(easier, better)
Yours,
David

LLyf said:
Hello,
As I'm gonna to use moto dorid turbo in China, my Carrier, China telecom required for lte band 1. I'd like to learn about some useful ways to unlock Lte band1 in order to use it....................(easier, better)
Yours,
David
Click to expand...
Click to collapse
There is no way to "unlock" bands on any device. If your phone does not have a certain band, you're out of luck.

Latiken said:
There is no way to "unlock" bands on any device. If your phone does not have a certain band, you're out of luck.
Click to expand...
Click to collapse
Correct, you can enable bands the manufacturer has disabled, but you cannot "unlock" bands that were not there in the first place.
On Qualcomm Snapdragon phones, some manufacturers like Samsung, One Plus and others apparently first make a global phone template for a phone like the Galaxy S5 which is sold everywhere, then disable the bands not needed in certain regions/various carriers. (If they did not disable those bands, the phone would be sort of like a Nexus phone -- but they do disable them because carriers want phones that only work for them, to lock in customers.) By using QPST and similar modem software people have had luck re-enabling those bands that were disabled via the manufacturer.
For people who don't know about this, google: "enable LTE bands Qualcomm" for starters... Heres' one brief article: http://pocketnow.com/2014/10/31/extra-smartphone-radio-bands
But if the bands were never there to begin with, they cannot be re-enabled. Can't create something out of nothing.
All the Quarks (XT1225/XT1250/XT1254) share LTE bands 2, 3, 4, 7.
Additionally, the XT1254/XT1250 has LTE band 13 -- as well as CDMA bands.
Additionally, the XT1225 has LTE bands 5 & 17 (but not LTE band 13), has no CDMA bands -- but does have extra HSPA/UMTS bands the XT1254/XT1250 does not have.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Theoretically, because the XT1254/XT1250 Quark (Droid Turbo, U.S. Moto Maxx) has LTE band 13 (but not 5 & 17) and the XT1225 Quark ("international" Moto Maxx/Moto Turbo) has LTE bands 5 & 7 (but not 13), you could enable those bands on all Quarks -- so that they all had 2, 3, 4, 5, 7, 13, 17. Theoretically, depending on if Motorola has similar process to Samsung in designing/manufacturing.
And realistically, probably not, if Motorola created two separate templates for the XT1254/XT1250 and the XT1225.

ChazzMatt said:
Correct, you can enable bands the manufacturer has disabled, but you cannot "unlock" bands that were not there in the first place.
On Qualcomm Snapdragon phones, some manufacturers like Samsung, One Plus and others apparently first make a global phone template for a phone like the Galaxy S5 which is sold everywhere, then disable the bands not needed in certain regions/various carriers. (If they did not disable those bands, the phone would be sort of like a Nexus phone -- but they do disable them because carriers want phones that only work for them, to lock in customers.) By using QPST and similar modem software people have had luck re-enabling those bands that were disabled via the manufacturer.
For people who don't know about this, google: "enable LTE bands Qualcomm" for starters... Heres' one brief article: http://pocketnow.com/2014/10/31/extra-smartphone-radio-bands
But if the bands were never there to begin with, they cannot be re-enabled. Can't create something out of nothing.
All the Quarks (XT1225/XT1250/XT1254) share LTE bands 2, 3, 4, 7.
Additionally, the XT1254/XT1250 has LTE band 13 -- as well as CDMA bands.
Additionally, the XT1225 has LTE bands 5 & 17, has no CDMA bands -- but does have extra HSPA/UMTS bands the XT1254/XT1250 does not have.
Theoretically, because the XT1254/XT1250 Quark (Droid Turbo, U.S. Moto Maxx) has LTE band 13 (but not 5 & 17) and the XT1225 Quark ("international Moto Maxx, Moto Turbo) has LTE bands 5 & 7 (but not 13), you could enable those bands on all Quarks -- so that they all had 2, 3, 4, 5, 7, 13, 17. Theoretically, depending on if Motorola has similar process to Samsung in designing/manufacturing.
And realistically, probably not, if Motorola created two separate templates for the XT1254/XT1250 and the XT1225.
Click to expand...
Click to collapse
My bad, I wasn't aware that certain bands are disabled.

Latiken said:
My bad, I wasn't aware that certain bands are disabled.
Click to expand...
Click to collapse
on Samsung phones, One Plus phones and some others like ZTE, the bands are disabled and can be re-enabled. Especially if the bands are present on a variant elsewhere in the world, there's a chance it can be enabled on your variant. There's tons of threads on XDA about enabling extra LTE bands on various phones.
But for the Quarks, if LTE band 1 or LTE band 20 (popular in Europe) is on none of the Quark phones (they are not), then you can't enable something that's not there in the first place.
Additionally, on the Quark phones, if Motorola has two completely separate blueprints/templates -- whatever you want to call it -- one for the XT1254/XT1250 (which are EXACTLY the same phone, same FCC ID, even if different number) and a different one for the XT1225, then you can't create a "universal" Quark sharing all the bands they both have. You could NOT create a Droid Turbo with LTE bands 2, 3, 4, 5, 7, 13, 17.

can i flash moto maxx image on droid turbo

i'm looking for a new motorola droid turbo xt1254 to use it in my country Italy.
after unlock the bootloader can i flash a motorola moto maxx image with RSDLite?

Buy what you need in the first place
What are you trying to do? If you don't want an XT1254, buy the Quark model you do want.
Also, it's not clear which Moto Maxx you are talking about... It would be better to speak in model NUMBERS than model NAMES.
Of the Quarks, there are TWO "Moto Maxx" models: XT1250 U.S. Moto Maxx and XT1225 "international" Moto Maxx. Which Moto Maxx image do you want to flash over the XT1254 Droid Turbo and WHY?
1) the XT1250 U.S. Moto Maxx which is EXACTLY the same device as the XT1254 Droid Turbo -- same bands, same FCC ID. Yes, you can flash that firmware over the XT1254, but you will have the EXACT same phone. You just won't have the Verizon bloatware. However, if you just rooted the XT1254, you could remove the Verizon bloatware. So, why would you want to have the same phone by flashing XT1250 Moto Maxx firmware?
2) the XT1225 "international" Moto Maxx -- also called the "XT1225 Moto Turbo" in India. Same hardware as the other Quark (XT1254/XT1250), but different radio bands. Different FCC ID. No CDMA bands, more HSPA bands than the other Quark, LTE bands 2, 3, 4, 5, 7, 17.
Even though it's called "international", I own three of the XT1225 here in the U.S. as they have all the AT&T bands I use here.
The XT1225 is probably the Moto Maxx you are talking about? NO, you cannot flash XT1225 firmware over the XT1254 to "convert" it to XT1254.
If you want an XT1225, just buy an XT1225. Why are you buying an XT1254 and then trying to convert it to an XT1225?
I don't understand people in other countries buying the XT1254 Droid Turbo. If you don't need CDMA (that's a U.S. peculiarity) or LTE band 13 (which only Verizon uses), the XT1225 is the better phone for that purpose. The XT1225 bootloader is easily unlockable via Motorola website for FREE (XT1254 costs $25 via Sunshine), and the XT1225 has more HSPA and LTE bands than the XT1254/XT1250.
________
All the Quarks have the same hardware, but the difference is the radio bands.
Yes, the XT1225 and XT1254/XT1250 all share LTE bands 2, 3, 4, 7.
The XT1225 additionally has LTE band 5 and 17.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
The XT1254 Droid Turbo/XT1250 U.S. Moto Maxx instead has LTE band 13 (Verizon LTE band), plus CDMA bands. While it does have some HSPA bands, there's not as many as in the XT1225.

I live in Ukraine and we have hundreds of used XT1254 from U.S. for sale and only one new Moto Maxx for 500 USD on most poplular ukrainian websites like ebay. And we have CDMA/EVDO Rev. B here. Officially these phones not selling here. So dont wonder why "people in other countries buying the XT1254 Droid Turbo". I bought it because of Ballistic Nylon back cover.

And your carrier uses CDMA? Because most European countries eschew that outdated standard. I was in Kiev for two weeks a few years ago, in summer 2005 soon after the Orange Revolution but I didn't use a cell phone. I was volunteering at an orphanage.
Mobile
There are several companies serving cellular connection in Ukraine:
GSM: Kyivstar GSM, MTC (former UMC), Djuice, Jeans, Beeline, Life
CDMA: CDMA Ukraine, Intertelecom, PEOPLE Net, U'TEL (Ukrtelecom)
Click to expand...
Click to collapse
The Italian guy posting the question doesn't use CDMA or he wouldn't be wanting to convert it to XT1225...
Most people buying the XT1254 don't even know about the other Quarks because Verizon lied so convincingly to the media that this device was "exclusive" to Verizon worldwide. It was never exclusive -- not even in the U.S. (XT1250 has same FCC ID) --and was one of two Quarks released to a few countries.
People in Europe were buying the XT1254 Droid Turbo even when the bootloader was locked down, when they would have been much better with the XT1225 Moto Maxx/Moto Turbo instead. These were people who had no use for CDMA, just needed HSPA and LTE.
For most people, the XT1225 is the better choice as it's easily rooted (for free), has more LTE and HSPA bands. Regrettably none have the LTE band 20 which is used a lot in Europe.
XT1225 only comes in Ballistic Nylon -- which is really ballistic nylon + kevlar underneath. Yes, it's BOTH. Whereas Kevlar version is kevlar ony.
XT1225 only comes in 64GB internal storage, which is why prices have remained higher. XT1254 comes in both 32GB/64GB and most people go cheaper with the 32GB version.

I use it with GSM, but we also have CDMA, Droid Turbo doesnt allow to use CDMA as NV item, only with RUIM. Thats because I use only GSM on this device. If hardware is the same, why no one cant unlock xt1254's radio to flash it with moto maxx radio. I bought it because only used Droid Turbo is selling here.

Do calls and data work simultaneously using GSM sims?

i'll be installing BlissPop or OK when i get the device, wondering..
somebody with a turbo using it on Tmobile or At&t clear me this one up, you can have voice and data, right?, this is just a verizon issue, right?
never saw a clear answer for this question
also, what bands are supported??

solidus636 said:
somebody with a turbo using it on Tmobile or At&t clear me this one up, you can have voice and data, right?, this is just a verizon issue, right?
Click to expand...
Click to collapse
Which "Turbo" do you have? Droid Turbo XT1254 or Moto Turbo XT1225? I assume Droid Turbo because only those people don't also give the model number.
There's two distinct devices (two FCC IDs), sold under three model names:
Verizon Droid Turbo XT1254/U.S. Moto Maxx XT1250 (same phone, same bands, same FCC ID) and
Moto Turbo XT1225/"international" Moto Maxx XT1225 (different FCC ID from XT1254/XT1250, but all XT1225 share the same bands with each other, and are the same phone).
These Droid Turbo/Moto Turbo/Moto Maxx are all under the "Quark" umbrella and except for radio bands are the same hardware, just like all "LG G4" are all the same hardware even though sold by different carriers in different countries.
All the custom ROMs support all Quarks. Custom ROMs over here are for all Quarks, ROMs (kernels, recovery, apps) over in the other Quark forum are also for the XT1254. Most dev work is still over there.
Of course Quarks with GSM/HSPA/LTE carrier SIM cards get simultaneous data/calls -- that's only a Verizon (CDMA) issue. But during phone calls on GSM/HSPA/LTE carriers, you will temporarily drop down to HSPA during the call (for simultaneous data/cellular voice), then jump back to LTE (data only) after the call is completed.
solidus636 said:
i'll be installing BlissPop or OK when i get the device, wondering..
Click to expand...
Click to collapse
What is "OK" ROM?
We have 7 custom Marshmallow ROMs for the Quark (maybe 8 depending on how you count) -- they work on ALL Quarks, thanks to our CM dev.
But I'm not familiar with OK ROM. Oh, maybe you mean AOKP? See, I think you are just looking at ROMs here. Yeah, Bliss and AOKP are great, but we have TWO Quark forums. Click that link above and you see all the ROMs. TWRP recovery and BHB27 custom kernel and other ROMs live over in the other Quark forum.
Right now, seems Bliss and Resurrection Remix (Marshmallow) are the two most popular.
Since you don't have the device yet, just to let you know... the XT1254 need paid bootloader unlock via Sunshine($25). Thank Verizon. The other Quarks have free bootloader unlock via code from Motorola website. No, there's no free bootloader unlock for the XT1254. Just believe us.
solidus636 said:
also, what bands are supported??
Click to expand...
Click to collapse
As for what GSM/HSPA/LTE bands the Droid Turbo XT1254 supports? Well, let's discuss all Quarks. The XT1254 is yours.
The XT1225 and XT1254/XT1250 all share LTE bands 2, 3, 4, 7.
The XT1225 additionally has LTE band 5 and 17 (more bands used by AT&T).
___________________
FCC ID IHDT56PK2
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
____________________
The XT1254/XT1250 instead has LTE band 13 (Verizon LTE band), plus CDMA bands. While it does have some HSPA bands, there's not as many as in the XT1225.
FCC ID IHDT56PK1
______________________
The Droid Turbo XT1254 has LTE bands 2, 3, 4, 7, 13.
AT&T uses LTE bands 2, 4, 5, 17.
T-mobile uses LTE bands 2, 4, 12
So, of course you can use the Droid Turbo XT1254 on SOME of AT&T's LTE bands or some of T-mobile's LTE bands. Just not all of them!
The problem you will have is in cities like Atlanta, GA where I live where AT&T uses LTE band 17 a lot. In places like that you will have HSPA/HSPA+. In areas where AT&T uses LTE bands 2 and 4 you will be OK. In northern part of Georgia when I drive to Chattanooga, that's mostly LTE band 4, so you would be OK.
So, for AT&T you mostly need a phone with LTE bands 2, 4, 17. (5 is used very little.)
For T-mobile you mostly need a phone with 2, 4, 12.
You have a phone -- the Droid Turbo XT1254 -- with two of those bands: LTE bands 2 & 4.
I have the sibling Quark, the Moto XT1225 -- so I have all of AT&T's LTE bands.
As long as you stay in places AT&T uses LTE bands 2 & 4, you will get LTE. IF you drop down to HSPA, it's probably because you are in an LTE band 17 area or just crappy LTE signal in general.
Same advice with T-mobile and LTE band 12.
_____
Now on AT&T or T-mobile you will NOT get VoLTE. AT&T restricts that to certain AT&T-branded phones and T-mobile restricts that to LTE band 12. BUT you will still get simultaneous data/cellular voice during phone calls on either carrier.

Most thorough reply I've ever received, yes I am going to get the Verizon model, and excellent I'm in the bay area, glad to know LTE will work!! This all sounds great, the person I'm buying it from has already done the unlock! Excellent deal all around I can't wait!
How is battery life with Doze?? I can't wait to use Naptime and see how it is

I received it, works amazingly I love this phone.