Develop Bugs

Samsung Galaxy Nexus Variants?

Hi friends, these days buy a samsung nexus I9250 galaxy, but I wanted something:
1. few versions of the galaxy samsung nexus there?
2. There is a version that supports GSM networks lte? which is?
3. i9250 model supports HSPA + 21?
4. i9250 model that handles frequencies in HSPA +?

There are 2 versions.
1) CDMA/LTE on Verizon Wireless USA only. Model i515
2) GSM/HSPA+ (21mbps radio). Pentaband (works on any GSM carrier). Model i9250
And that's it! There are no GSM/LTE models.

i9250t provided by Telstra an Australian service provider.
Sent from my Galaxy Nexus using xda premium

zeekiz said:
i9250t provided by Telstra an Australian service provider.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
in what frecuency works the I9250t?

jamm513 said:
in what frecuency works the I9250t?
Click to expand...
Click to collapse
As I noted in my post... they all support the same frequencies. Its pentaband GSM it'll work on any GSM network in the world.
For your reference so you can stop asking: http://www.phonearena.com/phones/Samsung-GALAXY-Nexus_id5595

I'm not sure, take expansys for example:
USA:
Network: HSPA+ 21Mbps/HSUPA 5.76Mbps 850/900/1900/1700/2100 / Quad-band GSM/GPRS/EDGE: 850/900/1800/1900 MHz / (Band frequency, HSPA availability, and data speed are operator dependent)
UK:
Network: HSPA/WCDMA Europe/Asia: 900/2100 MHz / HSPA+ 21Mbps/HSUPA 5.76Mbps / Quad-band GSM/GPRS/EDGE: 850/900/1800/1900 MHz / (Band frequency, HSPA availability, and data speed are operator dependent)
*Also, on Samsung web SAR page, there:
GT-I9250 GT-I9250J GT-I9250M GT-I9250T
from here:
http://www.samsung.com/sar/sarMain?site_cd=&prd_mdl_name=9250&selNatCd=US&languageCode=EN
So maybe there 4 different variant, also there a SC-04D for Japan,
SHW-M420S and M420K for Korea.
somebody have to check it , also the nexus S have plenty of variants, so I see nothing new here, but just go for standard GT-I9250 as it's pentaband 3G that will work in any country , BTW I dunno if GT-I9250* go with other build thank "yakju", not that it will do anything with the frequencies as it's software, but if you think of it, with other devices there mostly 2 main variants, 1 for Europe, and 1 for Americas, sometime also for China, and other regions. Anyone can get more info about it?

E15i said:
I'm not sure, take expansys for example:
USA:
Network: HSPA+ 21Mbps/HSUPA 5.76Mbps 850/900/1900/1700/2100 / Quad-band GSM/GPRS/EDGE: 850/900/1800/1900 MHz / (Band frequency, HSPA availability, and data speed are operator dependent)
UK:
Network: HSPA/WCDMA Europe/Asia: 900/2100 MHz / HSPA+ 21Mbps/HSUPA 5.76Mbps / Quad-band GSM/GPRS/EDGE: 850/900/1800/1900 MHz / (Band frequency, HSPA availability, and data speed are operator dependent)
*Also, on Samsung web SAR page, there:
GT-I9250 GT-I9250J GT-I9250M GT-I9250T
from here:
http://www.samsung.com/sar/sarMain?site_cd=&prd_mdl_name=9250&selNatCd=US&languageCode=EN
So maybe there 4 different variant, also there a SC-04D for Japan,
SHW-M420S and M420K for Korea.
somebody have to check it , also the nexus S have plenty of variants, so I see nothing new here, but just go for standard GT-I9250 as it's pentaband 3G that will work in any country , BTW I dunno if GT-I9250* go with other build thank "yakju", not that it will do anything with the frequencies as it's software, but if you think of it, with other devices there mostly 2 main variants, 1 for Europe, and 1 for Americas, sometime also for China, and other regions. Anyone can get more info about it?
Click to expand...
Click to collapse
It doesn't matter what variation it is, a GSM phone will work on GSM networks and a LTE phone on all LTE networks. (unlocked, of course)
GSM and LTE have completely different frequencies so a GSM phone will not work on LTE networks and vice versa.
PS. HSDPA+ has nothing to do with the phone itself but if the network you are on provides you with it.

E15i said:
I'm not sure, take expansys for example:
USA:
Network: HSPA+ 21Mbps/HSUPA 5.76Mbps 850/900/1900/1700/2100 / Quad-band GSM/GPRS/EDGE: 850/900/1800/1900 MHz / (Band frequency, HSPA availability, and data speed are operator dependent)
UK:
Network: HSPA/WCDMA Europe/Asia: 900/2100 MHz / HSPA+ 21Mbps/HSUPA 5.76Mbps / Quad-band GSM/GPRS/EDGE: 850/900/1800/1900 MHz / (Band frequency, HSPA availability, and data speed are operator dependent)
*Also, on Samsung web SAR page, there:
GT-I9250 GT-I9250J GT-I9250M GT-I9250T
from here:
http://www.samsung.com/sar/sarMain?site_cd=&prd_mdl_name=9250&selNatCd=US&languageCode=EN
So maybe there 4 different variant, also there a SC-04D for Japan,
SHW-M420S and M420K for Korea.
Click to expand...
Click to collapse
Its all just semantics and slightly different radio software. They are all the same. You can use ANY i9250 model on ANY GSM carrier in the world. Read my first post it gives you all the information you need in practicality.
The i9250 is regularly for sale from dozens of resellers. Just buy one ffs.

What did you mean by Its all just semantics and slightly different radio software?
you mean it's possible to disable some of the frequencies with flashing different radio? from what I learned here, software have nothing to do with the frequencies that device supports, only hardware (antennas) matters here. also the other variants, are made for specific operators, so a normal i9520 wins, as you not depend on Samsung or the operator for OTA updates, also I'm not sure if let say J variant get OTA with "yakju".

E15i said:
What did you mean by Its all just semantics and slightly different radio software?
you mean it's possible to disable some of the frequencies with flashing different radio? from what I learned here, software have nothing to do with the frequencies that device supports, only hardware (antennas) matters here. also the other variants, are made for specific operators, so a normal i9520 wins, as you not depend on Samsung or the operator for OTA updates, also I'm not sure if let say J variant get OTA with "yakju".
Click to expand...
Click to collapse
Not hardware radio, software radio. The different variants (yakju** models) have slightly different radio software for the regions they're originally sold in. All i9250 models support the same GSM frequencies.
These models aren't necessarily made for specific carriers but specific regions. Any i9250 can be flashed to yakju with images from Google if you prefer. You will receive OTAs either way, but may receive them slightly faster if you choose to flash to yakju.
Long story short, you shouldn't care. Just buy the cheapest one you can get, because if it doesn't come with yakju out of the box, it takes about ~5minutes to flash it to yakju and be the exact same (and no this doesn't require root or anything, you just unlock your bootloader and flash images, then it is completely stock).
So just to drive it home again: ANY i9250 you buy will work on ANY carrier in the world. The hardware is the same, and the software may be slightly different, but 100% changeable to your liking. Just buy the phone.

Ok, and I guess, lock the bootloader after?
I also buy it soon, and I also want to use "yakju" build, but dont want to root or unlock bootloader, but there is no way to flash "yakju" without unlock the bootloader?

*sigh*
Jesus christ what happened to the experimental Nexus spirit?
Why on earth even get this phone if you are afraid of touching it?
It's a phone designed to be ****ed with and still be bootable with code hosted outside it if you **** it up completely. It's virtually impossible to break.
How on earth can you even consider buying this phone if your main intention is not using what is what made for?
If you don't want all that, just get a regular phone, made for regular people, where you get your updates, regularly, through some really ****ty 3rd party "value-addon" software. Which only runs on 2 versions of Windows. And slowly.
Or just get your yakju/non-yakju phone and get the updates when you do, which will still be before everyone else.
Really.
You are putting to much into this. Either you want a moddable phone, and this one is it, or you are not a modder, and you should get something else.

josteink said:
*sigh*
Jesus christ what happened to the experimental Nexus spirit?
Why on earth even get this phone if you are afraid of touching it?
It's a phone designed to be ****ed with and still be bootable with code hosted outside it if you **** it up completely. It's virtually impossible to break.
How on earth can you even consider buying this phone if your main intention is not using what is what made for?
If you don't want all that, just get a regular phone, made for regular people, where you get your updates, regularly, through some really ****ty 3rd party "value-addon" software. Which only runs on 2 versions of Windows. And slowly.
Or just get your yakju/non-yakju phone and get the updates when you do, which will still be before everyone else.
Really.
You are putting to much into this. Either you want a moddable phone, and this one is it, or you are not a modder, and you should get something else.
Click to expand...
Click to collapse
That's quite a pompous rant. Shame you're so embarrassingly off the mark. The Nexus is a dev phone, because it is important to have a smoothly running device with the latest operating system out there for manufacturers and app developers. It contributes to the viability of the Android ecosystem (#1 reason the Nexus is made for). Hence the rapid OTA system on an incremental version basis. But you're full blown ego-crazy if you think Google released a phone just for you - the 0.001% that wants to mod. This is a mass market phone now (#2 reason it is made for). Most consumers buy it exactly so they don't have to root and install custom roms to stay up to date without the inherent bleeding-edge bugs that goes along with hacking. All Android phones are moddable. Why the hell wouldn't you have bought something with better specs if you were just going to mod it? You did it wrong. Sorry to break it to you, but Google made the GN without your specific hobby in mind.

E15i said:
Ok, and I guess, lock the bootloader after?
I also buy it soon, and I also want to use "yakju" build, but dont want to root or unlock bootloader, but there is no way to flash "yakju" without unlock the bootloader?
Click to expand...
Click to collapse
You don't root. You do unlock the bootloader, but who cares! If you must have a locked bootloader, its just 1 extra command line entry to lock it again after you're done flashing to yakju.
Don't think you're understanding really. Unlocking the bootloader on a Nexus is not a big deal. It is literally 1 command line entry to unlock or lock. Like I said, flashing yakju takes literally 5 minutes.

I know that, but people here talking about the variants of it,
how can we be 100% sure, that for example M and J have the same hardware?
and only the radio software is different?!

E15i said:
I know that, but people here talking about the variants of it,
how can we be 100% sure, that for example M and J have the same hardware?
and only the radio software is different?!
Click to expand...
Click to collapse
You just know! Stop worrying FFS. I could hand you either one with flashed yakju firmware and you would never be able to tell the difference (even with regional software you wouldn't tell). No matter what, you'll get an i9250 that's what matters.

Hi im a passive reader i never register... but now i want to buy this phone and I cant find the answer..
I want to buy this product
amazon.de/Samsung-Smartphone-Touchscreen-Megapixel-titanium-silber/dp/B005Y5SE6I/ref=dp_return_1?ie=UTF8&n=562066&s=ce-de
But i dont know if this model: GT-I9250TSADBT is pentaband or not...
My 3G network is 850/1900
Ty for the answer and sorry for my noob question

Mapeed said:
Hi im a passive reader i never register... but now i want to buy this phone and I cant find the answer..
I want to buy this product
amazon.de/Samsung-Smartphone-Touchscreen-Megapixel-titanium-silber/dp/B005Y5SE6I/ref=dp_return_1?ie=UTF8&n=562066&s=ce-de
But i dont know if this model: GT-I9250TSADBT is pentaband or not...
My 3G network is 850/1900
Ty for the answer and sorry for my noob question
Click to expand...
Click to collapse
All GSM Galaxy Nexus devices are pentaband.

Mapeed said:
Hi im a passive reader i never register... but now i want to buy this phone and I cant find the answer..
I want to buy this product
amazon.de/Samsung-Smartphone-Touchscreen-Megapixel-titanium-silber/dp/B005Y5SE6I/ref=dp_return_1?ie=UTF8&n=562066&s=ce-de
But i dont know if this model: GT-I9250TSADBT is pentaband or not...
My 3G network is 850/1900
Ty for the answer and sorry for my noob question
Click to expand...
Click to collapse
Create a thread. No need to bump a thread from 3 months ago to ask an unrelated question.
Sent from the future.

SocialReject said:
Create a thread. No need to bump a thread from 3 months ago to ask an unrelated question.
Sent from the future.
Click to expand...
Click to collapse
If i do that u will tell me then that i have to use the search tool...
Ty for the answer

[Q] Is T-Mobile version equal to AT&T version?

I got a T-Mobile HTC One (M8) only to discover there's no coverage where I am. I already rooted, S-OFFed, TWRPed, and transferred all my files, history, texts, configured it, etc. so I really want to just keep the phone, pay it off, and switch to AT&T, but is there anything I'd lose out on? Are there any differences between the phones themselves (limiting radio differences, etc.) that I should know about? Will the phone perform equally on AT&T's network?
Thanks!

No differences as far as I know. Just that the carrier is different obviously.
Sent from my Nexus 7 using Tapatalk

I'm pretty sure the AT&T version has more LTE bands? I could be totally wrong though...
From the GSMArena spec sheet
LTE 700 / 850 / 1700 / 1800 / 1900 / 2100 / 2600 - AT&T
LTE 700 / 1700 / 2100 - T-Mobile
Click to expand...
Click to collapse

Cuppeerr said:
I'm pretty sure the AT&T version has more LTE bands? I could be totally wrong though...
From the GSMArena spec sheet
Click to expand...
Click to collapse
Do you know if that's the sort of thing that you can flash a radio update to fix? or is that a hardware issue (lacking hardware)?

quinxy said:
Do you know if that's the sort of thing that you can flash a radio update to fix? or is that a hardware issue (lacking hardware)?
Click to expand...
Click to collapse
It's a hardware thing.

Just to follow up on my own post...
I did some research and the frequencies which are not in a T-Mobile HTC One (M8) when moved to AT&T appear to be used by non AT&T companies who are likely roaming partners of AT&T (e.g., Rogers in Canada, U.S. Cellular in the West (I think)). So, doesn't seem like a huge negative, unless roaming quite a bit and/or going to Canada.

Flash AT&T radio on T-mobile M8

Currently owns a Google Nexus 4, and already bought an M8. Apparently it has T-Mobile bands/radio by checking with the listed specification.
Some of my questions:
I have read quite a few threads here and I got an impression that when you flash different radio it opens up different bands?
To flash radio, I have to S-OFF, change CID to Super CID. Is this correct? Do I have to change my MID, too?
Thanks in advance!

richteralan said:
Currently owns a Google Nexus 4, and already bought an M8. Apparently it has T-Mobile bands/radio by checking with the listed specification.
Some of my questions:
I have read quite a few threads here and I got an impression that when you flash different radio it opens up different bands?
To flash radio, I have to S-OFF, change CID to Super CID. Is this correct? Do I have to change my MID, too?
Thanks in advance!
Click to expand...
Click to collapse
Are you trying to use at&t?

an0ther said:
Are you trying to use at&t?
Click to expand...
Click to collapse
Not really. But apparently AT&T radio has more bands than TMO one. Some of them I need here in Hong Kong.

richteralan said:
Not really. But apparently AT&T radio has more bands than TMO one. Some of them I need here in Hong Kong.
Click to expand...
Click to collapse
I was going to say, soff, change mid and cid and run at&t ruu and it will make it a true at&t variant as long as your phone is unlocked. I don't know if this is the best route for you though. I think flashing a radio only requires soff, not even sure if it needs super cid.

Software won't enable more bands. It is hardware.

grim489 said:
Software won't enable more bands. It is hardware.
Click to expand...
Click to collapse
It used to be, yes. But for the newer Qualcomm MDM I read the radio firmware controls which bands the MDM activates. So HTC doesn't have to keep more than 5 different physical PCB designs, which lowers their production costs.
And they have this S-OFF stuff anyway to protect their region lock anyway.

richteralan said:
It used to be, yes. But for the newer Qualcomm MDM I read the radio firmware controls which bands the MDM activates. So HTC doesn't have to keep more than 5 different physical PCB designs, which lowers their production costs.
And they have this S-OFF stuff anyway to protect their region lock anyway.
Click to expand...
Click to collapse
Really? That's pretty cool I haven't seen anything about this. My bad.

an0ther said:
I was going to say, soff, change mid and cid and run at&t ruu and it will make it a true at&t variant as long as your phone is unlocked. I don't know if this is the best route for you though. I think flashing a radio only requires soff, not even sure if it needs super cid.
Click to expand...
Click to collapse
Yeah, not sure whether I want to go full AT&T tho....:laugh:

grim489 said:
Really? That's pretty cool I haven't seen anything about this. My bad.
Click to expand...
Click to collapse
I could be wrong, just guessing there.:silly:

OK, some further reading,
The Snapdragon 801 according to Qualcomm has a World Mode Modem.
http://www.qualcomm.com/snapdragon/processors/801
The RF transceiver according to the iFixit teardown is WTR1625L
https://www.ifixit.com/Teardown/HTC+One+(M8)+Teardown/23615
The WTR1625L according to Qualcomm, is
The WTR1625L can accommodate all cellular modes and 2G, 3G and 4G/LTE frequency bands and band combinations that are either deployed or in commercial planning globally.
Click to expand...
Click to collapse
http://www.qualcomm.com/chipsets/gobi/rf-solutions/rf-transceivers
So I really think it's all in radio firmware.

grim489 said:
Really? That's pretty cool I haven't seen anything about this. My bad.
Click to expand...
Click to collapse
Wasn't aware of this either. That is indeed pretty cool, if true.

Just want to report back:
Bought a Developer Edition M8 from B&H Photo. Apparently it has the following LTE bands:
LTE 700 / 850 / 1700 / 1800 / 1900 / 2100 / 2600
Band 12 / 5 / 4 / 3 / 2 / 1 / 7
No radio flashing needed for me.:good:

Which bands will this activate
---------- Post added at 12:17 PM ---------- Previous post was at 12:12 PM ----------
richteralan said:
Just want to report back:
Bought a Developer Edition M8 from B&H Photo. Apparently it has the following LTE bands:
LTE 700 / 850 / 1700 / 1800 / 1900 / 2100 / 2600
Band 12 / 5 / 4 / 3 / 2 / 1 / 7
No radio flashing needed for me.:good:
Click to expand...
Click to collapse
So our phones support band12? Awesome!!!!!

grim489 said:
Really? That's pretty cool I haven't seen anything about this. My bad.
Click to expand...
Click to collapse
on 15th Aug HTC added support for LTE band 40 in India with firmware update.

I have a T-Mobile HTC One M8 that is unable to access 4G LTE in my area because it doesn't have the proper radio band which is needed. It can connect to 1900 on 2G but not LTE. If I were to flash the GPE Radio files would I be able to get 4G LTE?

gringodad63 said:
I have a T-Mobile HTC One M8 that is unable to access 4G LTE in my area because it doesn't have the proper radio band which is needed. It can connect to 1900 on 2G but not LTE. If I were to flash the GPE Radio files would I be able to get 4G LTE?
Click to expand...
Click to collapse
Not sure. But if you are currently configured on Sense, my instinct would be to stick with the Sense radio. The GPE hboot is different from Sense, so I don't know if the radios are compatible or different. Flash the AT&T or US Dev Ed radio. Both support 1900 MHz LTE.

Does the phone only need S OFF to flash radio files or do I need root as well? I was rooted and S OFF via Sunshine before but am now back on stock.

gringodad63 said:
Does the phone only need S OFF to flash radio files or do I need root as well? I was rooted and S OFF via Sunshine before but am now back on stock.
Click to expand...
Click to collapse
S-off should do it. Although you may need to change your CID and MID.

HTC M8 Dual SIM is it Possible to Change the Band to make 4G work in Switzerland?

How to know which LTE band?
Hi!
I know that this has been talked before, but I could not find anything that works.
I have bought a HTC M8 dual sim in switzerland. Back in Argentina, I tried to make 4G work, and, of course, it doesn't.
I have read that there is some chance to change the band, by the qualcomm.
so.. how do I know which band(S) does my phone have?
Thanks in advance!

I use "LTE Discovery" App. Available on the Play Store.

xxopiumxx said:
Hi!
I know that this has been talked before, but I could not find anything that works.
I have bought a HTC M8 dual sim in switzerland. Back in Argentina, I tried to make 4G work, and, of course, it doesn't.
I have read that there is some chance to change the band, by the qualcomm.
so.. how do I know which band(S) does my phone have?
Thanks in advance!
Click to expand...
Click to collapse
According to this webpage, it supports LTE bands 3, 7, 8 and 20. And according to list of LTE bands by country on Wiki, Argentina uses LTE band 4. So it makes sense that you don't have LTE.
While radios are typically interchangeable among "regular" GSM M8 versions (s-off required to flash radios); this is not true for the Dual SIM. So while you are correct that band support is software based on the Snapdragon 801, the normal method to change bands is to flash another carrier version's radio. I don't think you have another version's radio to flash. Some folks have modified the the NV values on the CDMA M8 to change band support. But to my knowledge, nobody has gotten this to work on non-CDMA versions of the M8 (the changes just revert themselves after reboot).
I suspect you are out of luck. This is really something you should have researched before buying the phone.

redpoint73 said:
According to this webpage, it supports LTE bands 3, 7, 8 and 20. And according to list of LTE bands by country on Wiki, Argentina uses LTE band 4. So it makes sense that you don't have LTE.
While radios are typically interchangeable among "regular" GSM M8 versions (s-off required to flash radios); this is not true for the Dual SIM. So while you are correct that band support is software based on the Snapdragon 801, the normal method to change bands is to flash another carrier version's radio. I don't think you have another version's radio to flash. Some folks have modified the the NV values on the CDMA M8 to change band support. But to my knowledge, nobody has gotten this to work on non-CDMA versions of the M8 (the changes just revert themselves after reboot).
I suspect you are out of luck. This is really something you should have researched before buying the phone.
Click to expand...
Click to collapse
I kind of did. This is an fantastic mobile, besides the LTE detail; and by buying it in europe I've spent less than half of its price in Arg. pitifully.. I need the dual SIM. So, still a win win.
I will try to modify the NV values with QXDM... maybe i still have some luck left.
thanks =D

4G problem

Hello community what a great help can someone found from here ... so here we go ...
My problem is i turn on my mobile data to get 4g then stay's for a while but then it dissapears and then drops down to E and it wont change from there ... and in order to bring back the 4G i need to restart the phone or to shut it down and turn it on again ...
do i need to change my rom or i need to change / flash my radio ? rom is the stock rom i think i got on it ( 5.0.1 sense 6.0 )
see attachment
thx in advance

What is your location and carrier, and what bands do they use for 3G and LTE?

redpoint73 said:
What is your location and carrier, and what bands do they use for 3G and LTE?
Click to expand...
Click to collapse
my location is cyprus and my carrier is MTN now the bands i think are these but i am not sure i just find out now from a website http://www.worldtimezone.com/gsm.html
Cyprus 900 1800 3G 2100 MTN / 3G 2100 Cytamobile-Vodafone / 4G LTE MTN / 4G LTE PrimeTel;

italianveins said:
my location is cyprus and my carrier is MTN now the bands i think are these but i am not sure i just find out now from a website http://www.worldtimezone.com/gsm.html
Cyprus 900 1800 3G 2100 MTN / 3G 2100 Cytamobile-Vodafone / 4G LTE MTN / 4G LTE PrimeTel;
Click to expand...
Click to collapse
That doesn't tell me what band MTN uses for LTE (4G). You should call your carrier and ask them (and confirm they use 2100 MHz for 3G).

redpoint73 said:
That doesn't tell me what band MTN uses for LTE (4G). You should call your carrier and ask them (and confirm they use 2100 MHz for 3G).
Click to expand...
Click to collapse
ok i go tomorrow morning at there office and ask them in person what you just ask me .
thank you in advance as always very much i appriciate ur time as well

italianveins said:
ok i go tomorrow morning at there office and ask them in person what you just ask me .
thank you in advance as always very much i appriciate ur time as well
Click to expand...
Click to collapse
ok so frequencies are from 900 - 1800 for all speeds E up tp 4G and are using At&T Mobile

italianveins said:
ok so frequencies are from 900 - 1800 for all speeds E up tp 4G and are using At&T Mobile
Click to expand...
Click to collapse
I take this to mean 900 and 1800 MHz (bands 8 and 3), rather than the way you have it typed "from 900 - 1800" which makes it sound like a range, which doesn't make any sense.
I also don't think this information is correct (as I've interpreted it), as far as I can tell, 1800 MHz (Band 3) is not used for 3G anywhere in the world: https://en.wikipedia.org/wiki/UMTS_frequency_bands#Deployments_by_region_.28UMTS-FDD.29
You need to be sure of exactly what band is used for each (2G, 3G, LTE), before we can proceed:
What band (or bands) used for 2G?
What band (or bands) used for 3G?
What band (or bands) used for LTE?
It pretty rare that the same exact band or bands are used for all 3 (2G, 3G and LTE) by one carrier, so the answer is expected to be different for each, and should be asked, and answered on an individual basis.
Reason we need to be so specific here, is that there is no radio for this phone that supports Bands 3 and 8 across 2G, 3G and LTE (and in fact, no radio that supports Band 3 for 3G).
Once you've properly determined what bands are needed, and identified what M8 version supports those bands, the way to proceed would be:
1) S-off by sunshine
Note: If sunshine temp root doesn't work, you may need to unlock bootloader and root, before you can s-off with sunshin
2) Possibly need to change phone's CID and/or MID
3) Flash the firmware or RUU which contains the desired radio baseband
Even then, its not guaranteed that LTE will work. I've see a good number of folks on these forums that properly flashed the radio baseband (or converted to another version by RUU) that supports the desired bands, but still didn't get LTE service. I don't know why this happens, and have never seen a solution. But its a distinct possibility.
But at a minimum, you should be able to get 3G working on your carrier. Which alone may make the above process worthwhile.

redpoint73 said:
I take this to mean 900 and 1800 MHz (bands 8 and 3), rather than the way you have it typed "from 900 - 1800" which makes it sound like a range, which doesn't make any sense.
I also don't think this information is correct (as I've interpreted it), as far as I can tell, 1800 MHz (Band 3) is not used for 3G anywhere in the world: https://en.wikipedia.org/wiki/UMTS_frequency_bands#Deployments_by_region_.28UMTS-FDD.29
You need to be sure of exactly what band is used for each (2G, 3G, LTE), before we can proceed:
What band (or bands) used for 2G?
What band (or bands) used for 3G?
What band (or bands) used for LTE?
It pretty rare that the same exact band or bands are used for all 3 (2G, 3G and LTE) by one carrier, so the answer is expected to be different for each, and should be asked, and answered on an individual basis.
Reason we need to be so specific here, is that there is no radio for this phone that supports Bands 3 and 8 across 2G, 3G and LTE (and in fact, no radio that supports Band 3 for 3G).
Once you've properly determined what bands are needed, and identified what M8 version supports those bands, the way to proceed would be:
1) S-off by sunshine
Note: If sunshine temp root doesn't work, you may need to unlock bootloader and root, before you can s-off with sunshin
2) Possibly need to change phone's CID and/or MID
3) Flash the firmware or RUU which contains the desired radio baseband
Even then, its not guaranteed that LTE will work. I've see a good number of folks on these forums that properly flashed the radio baseband (or converted to another version by RUU) that supports the desired bands, but still didn't get LTE service. I don't know why this happens, and have never seen a solution. But its a distinct possibility.
But at a minimum, you should be able to get 3G working on your carrier. Which alone may make the above process worthwhile.
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Hello and thank you very much for you time i will go again and ask for more direct info's about bands individual
i have found back up of a radio and i flash my phone and now i do get LTE singnal's but hardly get H and 3G when no 4G detected it goes to E ... well ....
now i got another problem maybe i shou ld post a new thread ... my gestures won't work suddenly ( omg !! ) i calibrate and uncheck and reboot and check them from setting's over and over nothing worked

italianveins said:
i have found back up of a radio and i flash my phone and now i do get LTE singnal's but hardly get H and 3G when no 4G detected it goes to E ... well ....
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You need to specify exactly what you flashed, and where you got it from, for this info be worthwhile in any way.
Also, still need to know what bands your carrier is using, in order to determine what radio to flash.
Why you are flashing radios, without knowing if its the right one (supports your carrier's bands)? This is really careless and reckless.
Is the phone s-off? That is normally the only way you can flash radios manually (aside from a signed OTA, RUU, firmware.zip). And flashing things with s-off is a great way to brick the phone, if you flash the wrong thing (and it doesn't sound like you know well enough to know right vs. wrong).