Changing frequency band of LTE. Possible? - Upgrading, Modifying and Unlocking

For the last few years, there has been a confusion around that there are generally two types of phones; the ones working LTE in North America and others for global LTE frequencies.
Is there any remote chance we can change antenna frequency? Do you know any devices that have this capability or at least a free band for LTE?
Let's take an example of adding band 3 to North American phone. [emoji85]
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Wishful thinking
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Related

[Q] Devices from different countries get 4G band restrictions?

Are there any differences in the LTE support of N7105 bought in different countries?
Given that not all network providers support the same LTE bands, do the cellphones they sell get restricted to work only under their specific frequencies?
I am planning on buying a N7105 from TMN in Portugal, but I will be moving to the US for a PhD course after a couple months, and I would like my cellphone to not suffer any 4G speed losses due to connectivity restrictions in the device.
I have tried googling this, but could not come to any precise conclusion . Can anybody help?
Thank you in advance!
The N7105 has 800/1800/2600 MHz LTE capabilities, I believe. This is the same for every model sold.
On AT&T in the US, 3G will work just fine. I'm not sure you'll be able to use 4G, though, since they use different bands for LTE.
EDIT: Yes, AT&T uses 700 and 1700 MHz for LTE. The maximum you'd get on their network is HSPA+.
Sent from my GT-N7100 using xda premium

F400S/K/L Versions (Hardware Comparison) and usage on AT&T

Hola folks!
After finding enough screenshots/video reviews, I am beginning to think that from a hardware perspective the S and L variants are identical (including supported bands), whereas the K is only slightly different from S/L.
Any images of the back cover off on the K models (Olleh) will show "F400 0425 K" indicating the hardware is the "K" variant. (If you watch the review video http://www.androidcentral.com/lg-g3-review, you will notice this info up at the top on the backside, right above the camera.) UPDATE: Here is another link with an image http://arstechnica.com/gadgets/2014/06/lg-g3-review-a-great-phone-with-way-too-many-pixels/#image-4
On the S/L (SK Telecom, LG U+) models, they say "F400 0423 S/L" on the SK Telecom model ("S" variant), and "F400 0425 S/L" on the LG U+ model ("L" variant). You can find images of the "S" model with engadget's review (http://www.engadget.com/gallery/lg-g3-review/2676959/#!slide=2676963), and images of the "L" model with ubreakifix's F400L teardown (http://www.ubreakifix.com/blog/wp-content/uploads/2014/05/ubif-g3-21.jpg).
(Thanks and kudos to the review sites and teardown site for the images.)
As an owner of the F400S, I can tell you that all 3 variants will run on AT&T LTE (as a lot of our LTE is on Band 17 - 700 MHz spectrum). I was able to load my F400S with the TOT and DLL files of all 3 variants (currently waiting on getting it back to the "S" variant once the DLL is posted), and all 3 variants will connect to AT&T with no issues (for those of you that plan on importing like I did).
So for those of you who managed to brick your new G3, as long as you can ADB into it, you can edit your build.prop file with the corresponding korean variant model info, and load any stock image. As @wolfgart has posted a great thread with the TOTs and DLLs, I recommend swinging through there for more info. If you have a K variant, load the K TOT and DLL, and you are fine.
For those of us with S/L variants--with the above info and enough tinkering in the hidden menus of all 3 variants, I can tell you that from a hardware perspective these two models are nearly identical. From a modem/supported frequencies perspective, the S and L variants support the exact same frequencies--meaning, if you bricked your S or L version, you can restore it with an S or L TOT and DLL (after editing build.prop if needed) and you will still get all of your original hardware supported bands/frequencies. This is critical for those of you using LTE Band 5 to connect to your data... (should not be the case for any US AT&T users...).
UPDATE: in the 'Android Development' section, wolfgart's thread with the TOTs and DLLs have been updated to now include the files for all 3 models. So unless you know what you are doing with a build.prop edit, probably best to stick with what came with the phones for those who are new to this stuff.
The main difference between the S/L and K phones in frequency/band support is that LTE Band 8 is supported on the K model only, whereas you will get LTE Band 5 support on the S/L models. All other bands and frequencies (WCDMA/GSM) are the same across all 3 models. All 3 also support LTE Band 17, and will connect to AT&T in the US.
Took me a while to figure this out, but I had a long weekend
Cool! nice to know, thanks for the well explained post
Any thoughts about the L/S version suporting LTE Band 7?
Thanks
gsanches said:
Any thoughts about the L/S version suporting LTE Band 7?
Thanks
Click to expand...
Click to collapse
Unfortunately, I don't connect to LTE with band 7 so I can't say much on that. However, just based on the hidden menus in both (I am using the L version on my S variant phone at the moment), they both have the same listings of 1,3,5,7 for supported bands.
LTE 700, 850, 1800, 2100, 2600 (Band 17, Band 5, Band 3, Band 1, and Band 7 respectively)
UMTS 850, 1900, 2100
GSM 800, 900, 1800, 1900
The above are the fully supported bands on the S and L variants.
The below are the fully supported bands on the K variant.
LTE 700, 900, 1800, 2100, 2600 (Band 17, Band 8, Band 3, Band 1, and Band 7 respectively)
UMTS 850, 1900, 2100
GSM 800, 900, 1800, 1900
I don't have the K variant on my device now, but I recall the only band difference is that it supports LTE band 8 (900 MHz) instead of LTE band 5 (850 MHz), but other supported bands are the same. LTE Band 5 is one of the primary bands for both SK Telecom and LG U+ (which partially explains why the two phones have nearly identical hardware, including modem support).
Hope this answers your question. As support for those frequencies are built in (and it makes sense on LG as a mass manufacturer--They can use the same modem and just rebrand it like they did in Korea for the S and L variants).
Why is the S one more expensive than the L?
gsanches said:
Why is the S one more expensive than the L?
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Click to collapse
That, my friend, is a question you will have to ask LG and SK Telecom. We sorta see that in the US every so often with "special editions" that aren't really that special and they will add an extra 100ish.
Off-contract, LG U+ is the most affordable right now, with SK Telecom right around $700 USD. With markup and shipping, etc. eBayers are selling it for $750-800.
Also, you have to remember the G3 is a hot commodity even in Korea right now. Had some friends who thought it was funny I got a phone overseas before they even bothered joining the bandwagon.
So though I can't say for sure why exactly it's more expensive, I can definitely say it has to do with the fact that the phone is still only 3 weeks old
And none of those 3 will work on T-Mobile LTE which needs 1700 and 2100Mhz most of time.
There are some spots with 900Mhz support though.
But as much as I want G3, I'll wait for the T-Mo version.
Yeah...I'm a proud owner of a Htc One M7...I have been thinking a lot and decided that it's time to change. I'm comparing the M8, the Z2, the G3 for a long time and finally think that this last one will be the one...unfortunately it's still very soon to easily find information regarding this phone online...
Your information helped me a lot...now I know exactly which variant to buy :fingers-crossed:...thank you guys very much
gsanches said:
Yeah...I'm a proud owner of a Htc One M7...I have been thinking a lot and decided that it's time to change. I'm comparing the M8, the Z2, the G3 for a long time and finally think that this last one will be the one...unfortunately it's still very soon to easily find information regarding this phone online...
Your information helped me a lot...now I know exactly which variant to buy :fingers-crossed:...thank you guys very much
Click to expand...
Click to collapse
It looks like you are planning on doing the same upgrade I did. I still have my M7 as my backup , but definitely gotta say I am loving my G3.
That's amazing man...I've been a HTC fan since the Sensation...but currently I feel that they are been left behind...
I'm really sorry, but other brands are offering a lot more for the same price.
The HTC will always win in design and the quality of the phone's body, screen and, of course, sound!...but they are losing in the rest...UI, camera, battery life definitely...it's just sad
Nice to know that you're enjoying your G3...I hope I'll be as happy as you are in a few weeks...and judging by how much I've researched about it...I'm sure I'll love it!!!
Sent from my HTC One using XDA Free mobile app
question
sorry, which of these three variants brings FM radio? K, L, S, and if for example buy the K version, if you install the L or S variant fm radio works?
I´m about to buy a G3 and found some model have an antenna, is that correct?, anybody knows what tv frequencies can handle?. Thanks!
G3 HAPPY said:
sorry, which of these three variants brings FM radio? K, L, S, and if for example buy the K version, if you install the L or S variant fm radio works?
Click to expand...
Click to collapse
From my research, none of the korean models (F400 S/K/L) support FM radio. Instead of an FM radio tuner, they are offered with Korea's DMB tuner, for korean DMB support.
I have only seen DMB function while in Korea and Japan. Anywhere else in the world, you will have to check with local providers, as some countries will charge for DMB as a service (just like satellite television).
Hope this helps
ferluci said:
I´m about to buy a G3 and found some model have an antenna, is that correct?, anybody knows what tv frequencies can handle?. Thanks!
Click to expand...
Click to collapse
The only frequencies it can support is anything broadcasted as DMB. Certain countries offer DMB subscription services, but you will have to research if it is offered where you live.
In the US, DMB is unavailable so I just have a nice long antenna that people crack up at in the year 2014, but completely unusable where I am. I just tell them its for better service as a side joke lol
mikeythedude said:
The only frequencies it can support is anything broadcasted as DMB. Certain countries offer DMB subscription services, but you will have to research if it is offered where you live.
In the US, DMB is unavailable so I just have a nice long antenna that people crack up at in the year 2014, but completely unusable where I am. I just tell them its for better service as a side joke lol
Click to expand...
Click to collapse
OK! Thank you
Anyone know which one is the best for AT&T
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salvador1980 said:
Anyone know which one is the best for AT&T
Sent from my SM-N900 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Any of them will do. I would say go for the one that gives you the best price. At this point, enough AT&T users have gotten their hands on all 3 variants. Most can get LTE through band 17 (700 MHz) which is available on all 3 phones.
Will the D855 variant (with LTE 700MHz) be able to use on AT&T (band class 17) or Verizon (band class 13)?
Or to be more specific, will the D855 cover all 700MHz US band class (12, 13, 14, and 17)?
Thanks!
kittiyut said:
Will the D855 variant (with LTE 700MHz) be able to use on AT&T (band class 17) or Verizon (band class 13)?
Or to be more specific, will the D855 cover all 700MHz US band class (12, 13, 14, and 17)?
Thanks!
Click to expand...
Click to collapse
You would have to check which specific band class of 700 MHz the D855 would be capable of connecting to. As I do not have the D855, and specs are varied on the internet right now, I cannot say for sure.
The FCC had ruled four separate band classes to operate on the 700 MHz spectrum in America--Band 17 700 MHz capable modems cannot connect to any of the other 700 MHz band classes and vice versa. (It was claimed that they did not want to have any network interference issues. Carriers purchased the rights to access certain chunks of the 700 MHz spectrum, and they are isolated to those carriers only.)
I am seeing 700MHz (B28) support on D855 models, but I believe that might be related to certain LTE-A rollouts in Europe (meaning it may not be able to connect to current 700 MHz bands in the US (as the US does not have LTE-A networks at the moment) and new band classes are issued for LTE-A (i.e. Band 28).
mikeythedude said:
The only frequencies it can support is anything broadcasted as DMB. Certain countries offer DMB subscription services, but you will have to research if it is offered where you live.
In the US, DMB is unavailable so I just have a nice long antenna that people crack up at in the year 2014, but completely unusable where I am. I just tell them its for better service as a side joke lol
Click to expand...
Click to collapse
Does the antenna stand out much? Or is it hidden? Thanks

Pixel LTE bands - North America and Rest of the world

Hi there,
Looking at Google Pixels page one can see that there is two versions of the product: NA and RoW.
Question is: is there any chance of buying a RoW version in US? Has anyone ever managed to buy the past Nexus International Versions in US before?
Thanks all and regards
Took me a few seconds to figure out what RoW means. I'd like to know this too.
In regards to the N6p I tried to buy an Intl version from the US but it wasn't available.
Had to be bought from Intl market like EU or the Middle East..
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mazroui said:
In regards to the N6p I tried to buy an Intl version from the US but it wasn't available.
Had to be bought from Intl market like EU or the Middle East..
Sent from my LG-H818 using Tapatalk
Click to expand...
Click to collapse
Is there any difference in the UAE? Both versions support LTE Band 3 and UMTS Band 1. Should work fine in the UAE.
I'm using US 6P which also supports LTE B3 and have not had any issues at all.
Abra_Cadabra said:
Is there any difference in the UAE? Both versions support LTE Band 3 and UMTS Band 1. Should work fine in the UAE.
I'm using US 6P which also supports LTE B3 and have not had any issues at all.
Click to expand...
Click to collapse
To my understanding of supported LTE, UMTS, and GSM frequencies both Pixel Variants will work in UAE but Carrier Aggregation will probably not work. Not sure if the operators in the UAE support CA (yet) but if/ when they do this will probably something that wouldn't work on the NA variant. The only combination supported by the device for UAE bands is B7+B7, which may or may not work.
Whether this is a deal breaker or not is up to you to decide.
Won't work. There are two different version. One that supports international LTE bands and one that supports the bands in the USA. Just like the Nexus 6, 5x and 6P. If you buy the Pixel in the USA you'd only be able to use 3g speeds in Europe, band 7 (1800mhz) being the only exception.
In short, should you buy the pixel phone in the USA you won't have 4G in Europe and other countries that use the same bands.
mazroui said:
In regards to the N6p I tried to buy an Intl version from the US but it wasn't available.
Had to be bought from Intl market like EU or the Middle East..
Click to expand...
Click to collapse
Same with me. Worse than that, Google does not sell then in my country. So, unfortunately, I may have to buy outside US as well again.
Sent from my Nexus 6P using XDA Labs
pauleandro said:
Same with me. Worse than that, Google does not sell then in my country. So, unfortunately, I may have to buy outside US as well again.
Sent from my Nexus 6P using XDA Labs
Click to expand...
Click to collapse
Now that the pixel is out i can't seem to find anything online (N6p H1512 64/128gb) that comes with a warranty, if you do come across one that includes warranty please dm me.
I found out the warranty over here is handled by the retailers and is not international (covered by Google/Huawei).
mazroui said:
Now that the pixel is out i can't seem to find anything online (N6p H1512 64/128gb) that comes with a warranty, if you do come across one that includes warranty please dm me.
I found out the warranty over here is handled by the retailers and is not international (covered by Google/Huawei).
Click to expand...
Click to collapse
Of course, no problem. I'll let you know if I find anything.
Sent from my Nexus 6P using XDA Labs
I am also looking at this and cannot understand the CA limitations on the US device. Unless I am mistaken the Snapdragon X12 modem supports all combinations of supported frequencies. Yet the phones have different combinations for some reason. I do not know if Google is limiting this via software. Any thoughts?
scandalousk said:
Won't work. There are two different version. One that supports international LTE bands and one that supports the bands in the USA. Just like the Nexus 6, 5x and 6P. If you buy the Pixel in the USA you'd only be able to use 3g speeds in Europe, band 7 (1800mhz) being the only exception.
In short, should you buy the pixel phone in the USA you won't have 4G in Europe and other countries that use the same bands.
Click to expand...
Click to collapse
How comes? Both NA & RoW Pixel's tech specs show bands 3 and 20 (beside the band 7 & others) which are the most common bands used in Europe for LTE, so I can't see why the NA model won't have 4G in Europe... Can you please explain?
Lots of overlap
There appears to be quite significant overlap, with the NA version supporting all or almost all LTE bands in most European countries and in many non-European countries as well (including all LTE bands in UAE):
NA version: frequencycheck.com/compatibility/GPQkJ/google-pixel-xl-phone-nexus-m1-td-lte-na-128gb-htc-marlin/countries
RoW version: frequencycheck.com/compatibility/vWPw8/google-pixel-xl-phone-nexus-m1-global-td-lte-128gb-htc-marlin/countries
---------- Post added at 07:15 ---------- Previous post was at 06:52 ----------
Hmm... just noticed that a few European countries that FrequencyCheck lists the NA version as having only partial LTE coverage for are because the site considers the NA version not to support band 8. But, according to Google's own spec page (madeby.google.com/phone/specs/ > Telephony), both the NA and RoW versions support B8. No idea if FrequencyCheck is a generally reliable source of info, as I just discovered the site a few minutes ago. I hope Google's listing for their own phone is correct, but the fact that B8 isn't included anywhere in the LTE 2xCA and 3xCA breakdowns for the NA version as it is for the RoW version makes me wonder...
scandalousk said:
Won't work. There are two different version. One that supports international LTE bands and one that supports the bands in the USA. Just like the Nexus 6, 5x and 6P. If you buy the Pixel in the USA you'd only be able to use 3g speeds in Europe, band 7 (1800mhz) being the only exception.
In short, should you buy the pixel phone in the USA you won't have 4G in Europe and other countries that use the same bands.
Click to expand...
Click to collapse
sirda said:
How comes? Both NA & RoW Pixel's tech specs show bands 3 and 20 (beside the band 7 & others) which are the most common bands used in Europe for LTE, so I can't see why the NA model won't have 4G in Europe... Can you please explain?
Click to expand...
Click to collapse
Yes, the main European LTE bands are 3, 7 and 20, so it doesn't matter which version you have as both support all these bands. scandalousk is wrong.
Partially, it'll support 4G. But it won't support LTE-Advanced (4g+)
scandalousk said:
Partially, it'll support 4G. But it won't support LTE-Advanced (4g+)
Click to expand...
Click to collapse
It'll support LTE, but won't support LTE Carrier Aggregation. LTE-Advanced is more than just Carrier Aggregation.

Verizon Band 4

Any reason why my Pixel 2 XL will not connect to Verizon's Band 4? I get all of the other bands, but not Band 4.
BuffLG said:
Any reason why my Pixel 2 XL will not connect to Verizon's Band 4? I get all of the other bands, but not Band 4.
Click to expand...
Click to collapse
How are you determining which band your on?
Not trying to be sarcastic, I am truly curious. I too am on Big Red, but couldn't tell you what band I'm on
@Badger50: Answer to your question is at https://play.google.com/store/apps/details?id=net.simplyadvanced.ltediscovery&hl=en_US
@BuffLG: Verizon's band 4 may be widespread but it is used to provide added capacity to the network. If the cellular traffic in your location isn't heavy enough, you may never see band 4 even though the P2XL supports it.
I use Signal check to see the bands. Or LTE Discovery.
Strephon Alkhalikoi said:
@Badger50: Answer to your question is at https://play.google.com/store/apps/details?id=net.simplyadvanced.ltediscovery&hl=en_US
@BuffLG: Verizon's band 4 may be widespread but it is used to provide added capacity to the network. If the cellular traffic in your location isn't heavy enough, you may never see band 4 even though the P2XL supports it.
Click to expand...
Click to collapse
Much obliged kind sir. I do know/remember that I'm usually on band 13, but was curious to know how to check it. Thanks again :good::good:
Lol with LTE Discovery it says I'm on ATT band 12, while signal check shows band 17.
Sent from my SM-G960U using Tapatalk
Signal Check Pro easiest way.
Band 13 is Verizon's original LTE band has furthest range (700 mhz spectrum). Band 4 (1700 mhz) and 2 (1900 mhz) are their AWS spectrum.
Band 2 also has the highest capacity. Usually deployed in the most congested areas first.
Band 2 will technically be the fastest. Will probably be the hardest to connect to, but if you're close enough to a tower and getting Band 2 service, you're golden. I've seen speeds close to 100 MBPS on Band 2
I'd bet a nickel you're not seeing band 4 because of this bug: https://issuetracker.google.com/issues/37136986
turboencab said:
I'd bet a nickel you're not seeing band 4 because of this bug: https://issuetracker.google.com/issues/37136986
Click to expand...
Click to collapse
Reading through everything, most people are having issues with T-Mobiles LTE band 66 showing up as band 3.
fiffan86 said:
Reading through everything, most people are having issues with T-Mobiles LTE band 66 showing up as band 3.
Click to expand...
Click to collapse
This bug is relevant on Verizon, AT&T and T-Mobile but not Sprint (I believe) as they don't have Band 4 and/or 66. T-Mobile turned on MFBI at least several months (maybe a year?) before Verizon and AT&T did.
Again I don't know for sure if it's related to what you're seeing but it does "smell" that way. Band 4 in the Phoenix area almost always shows up as a Band 2 EARFCN that Verizon doesn't own when using Signal Check Pro as it is being reported incorrectly by Android. The EARFCN is correct under the same conditions using Network Signal Guru since it reads directly from the Qualcomm chip.
BuffLG said:
Any reason why my Pixel 2 XL will not connect to Verizon's Band 4? I get all of the other bands, but not Band 4.
Click to expand...
Click to collapse
I always got band 4 until the last couple weeks .. I now get Band 3 instead of band 4 which seems to be faster if I get a strong enough signal.. Band 3 doesn't seem to be as strong a signal as Band 4 though.. Band 4 was always displaying as XLTE where Band 3 displays as LTE.. my old Moto Pure still gets Band 4 so I really don't understand why the Pixel no longer will get it! Got to be by design by Verizon, me thinks!!
The Wood said:
I always got band 4 until the last couple weeks .. I now get Band 3 instead of band 4 which seems to be faster if I get a strong enough signal.. Band 3 doesn't seem to be as strong a signal as Band 4 though.. Band 4 was always displaying as XLTE where Band 3 displays as LTE.. my old Moto Pure still gets Band 4 so I really don't understand why the Pixel no longer will get it! Got to be by design by Verizon, me thinks!!
Click to expand...
Click to collapse
That's the exact issue @turboencab is talking about. There is no Band 3 LTE in the USA. You are seeing Band 3 because of an Android OS/Qualcomm bug that cuts off EARFCN values above 65536. Band 4 can be "displayed" as Band 66 and most operators choose to do this now. Band 66 EARFCN values are above 65536.
Tldr; there is no Band 3 in the US. You are still connected to Band 4. Apps aren't able to display the correct band due to an OS bug.
Try to use CellMapper as a tool to see what you're connected to. The devs for that app can "correct" this issue based off some assumptions. https://play.google.com/store/apps/details?id=cellmapper.net.cellmapper

4G frequency - Canada

Hello everyone
I'm moving to Canada in a couple of months and I was wondering if my Mi 6 LTE will function properly over there...
I notice it doesn't have band 12 but I also see that a lot of carriers use 2600mhz... I'm going to Toronto area... Can I survive only with 2600mhz or do I need other frequencies too?
Thanks!
You won't have problems, just use a compatible carrier.
https://www.frequencycheck.com/comp...dition-dual-sim-td-lte-tw-xiaomi-sagit/canada

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