MediaTek 6589/6589T/6592/6595 BandMode WCDMA-GSM-900Mhz missing issue ??? - Android Q&A, Help & Troubleshooting

Hi All,
As all we know the WCDMA 800/850/900/1900/2100 Mhz is only a mirage, because we all know that the in example the JIAYU G4T is supporting ONLY WCDMA-IMT-2000 (which is the WCDMA 2100Mhz).
OK from my experience so far, I have flashed so many modem.img files, from TCL Idol X (S950), TCL Hero N3 and ChangHong Z9(HonPhone W33) and with no success, I'm only killing my reception because I SUPPOSE that the build of this stupit modem.img file is different or the JIAYU G4 BandMode is somekind of hardware locked only on WCDMA 2100, BUT WHY ???? Is there any posibility to unlock the WCDMA-GSM-900 Mhz, it is natively supported by the MT6589T and how the rest of the Manufacturers are able to implement it and to make it working ?
You'll ask your self, "why this guy is still trying by killing his phone so many times", well the answer is very simple, because I belive that there are no imposible things in the world and because I know how to recover my IMEIs and so on and I have even tried with the ChangHong Z9(HonPhone W33) Modem Database and AP Database and guess ... I was able to recover the IMEI and even I've used a real ChangHong Z9 IMEI and I was able to write it on my JIAYU G4T BUT ....
AGAIN with no success, there were no reception at all and I was having IMEIs and YES in the Engineer Mode in the Band Mode section there were only WCDMA-GSM-900 and WCDMA-IMT-2000 marked but there was NO reception again !!!
and that's why I'm begging you to tell me how to edit the modem.img file, because I was unable to uncompress it anyhow (tried ext4_unpacker_exe but without success, it's unpacking only mediatek factory rom ".img" files)
You'll ask why I want to edit and to try to create custom modem.img to support WCDMA-GSM-900Mhz, because those idiots from JIAYU and not only them, are going to release their MTK6592 and even the other upcoming 6595 with only WCDMA 2100Mhz support and that's very STUPID !!! And at all JIAYU have a great design !!!
Only in Europe there are 45 x Mobile Carriers with WCDMA(UMTS) 900/2100 Mhz builded networks (Including big mobile carriers like O2 in UK) and all of us which are using JIAYU or THL or even almost all of the rest chinesse clones or other manufacturers MTK based phones, we all are going to suffer if we are in such area which is WCDMA 900 coverage available only.'
I'll give you an example which is very clean example for good marketing: TCL
they have 4-5 different Idol X S950 modem.img files for their 4-5 different versions of the Idol X S950 model !!! YES I was able to check that fact by accidentally founding the source codes of the 4-5 different region specific TCL Idol X S950 phone and after that I was able to read that for every region there is different modem.img which is region specific in the needs of the customers mobile carriers.
You'll ask me "Why don't you buy Idol X" because the JIAYU is smaller it fits in my hand better, that's why and because I like the design more and because have an OTA updatable MIUI V5 on it which is working flawlessly, that's why.
Also why I'm going to buy the next MTK6592 based JIAYU S2, because it have even better design (139mm x 67.5mm x 6mm) than the Idol X+ S960T (140.4 x 69.1 x 7.9 mm), but again it will strugles in WCDMA 900 Mhz that's why I beg all of you developers to help me to figure how to redifine the modem.img to be custom configured by our needs ?
Thanks in advance and sorry for the long post
:fingers-crossed:

cpurage said:
Hi All,
As all we know the WCDMA 800/850/900/1900/2100 Mhz is only a mirage, because we all know that the in example the JIAYU G4T is supporting ONLY WCDMA-IMT-2000 (which is the WCDMA 2100Mhz).
OK from my experience so far, I have flashed so many modem.img files, from TCL Idol X (S950), TCL Hero N3 and ChangHong Z9(HonPhone W33) and with no success, I'm only killing my reception because I SUPPOSE that the build of this stupit modem.img file is different or the JIAYU G4 BandMode is somekind of hardware locked only on WCDMA 2100, BUT WHY ???? Is there any posibility to unlock the WCDMA-GSM-900 Mhz, it is natively supported by the MT6589T and how the rest of the Manufacturers are able to implement it and to make it working ?
You'll ask your self, "why this guy is still trying by killing his phone so many times", well the answer is very simple, because I belive that there are no imposible things in the world and because I know how to recover my IMEIs and so on and I have even tried with the ChangHong Z9(HonPhone W33) Modem Database and AP Database and guess ... I was able to recover the IMEI and even I've used a real ChangHong Z9 IMEI and I was able to write it on my JIAYU G4T BUT ....
AGAIN with no success, there were no reception at all and I was having IMEIs and YES in the Engineer Mode in the Band Mode section there were only WCDMA-GSM-900 and WCDMA-IMT-2000 marked but there was NO reception again !!!
and that's why I'm begging you to tell me how to edit the modem.img file, because I was unable to uncompress it anyhow (tried ext4_unpacker_exe but without success, it's unpacking only mediatek factory rom ".img" files)
You'll ask why I want to edit and to try to create custom modem.img to support WCDMA-GSM-900Mhz, because those idiots from JIAYU and not only them, are going to release their MTK6592 and even the other upcoming 6595 with only WCDMA 2100Mhz support and that's very STUPID !!! And at all JIAYU have a great design !!!
Only in Europe there are 45 x Mobile Carriers with WCDMA(UMTS) 900/2100 Mhz builded networks (Including big mobile carriers like O2 in UK) and all of us which are using JIAYU or THL or even almost all of the rest chinesse clones or other manufacturers MTK based phones, we all are going to suffer if we are in such area which is WCDMA 900 coverage available only.'
I'll give you an example which is very clean example for good marketing: TCL
they have 4-5 different Idol X S950 modem.img files for their 4-5 different versions of the Idol X S950 model !!! YES I was able to check that fact by accidentally founding the source codes of the 4-5 different region specific TCL Idol X S950 phone and after that I was able to read that for every region there is different modem.img which is region specific in the needs of the customers mobile carriers.
You'll ask me "Why don't you buy Idol X" because the JIAYU is smaller it fits in my hand better, that's why and because I like the design more and because have an OTA updatable MIUI V5 on it which is working flawlessly, that's why.
Also why I'm going to buy the next MTK6592 based JIAYU S2, because it have even better design (139mm x 67.5mm x 6mm) than the Idol X+ S960T (140.4 x 69.1 x 7.9 mm), but again it will strugles in WCDMA 900 Mhz that's why I beg all of you developers to help me to figure how to redifine the modem.img to be custom configured by our needs ?
Thanks in advance and sorry for the long post
:fingers-crossed:
Click to expand...
Click to collapse
OK there is no need to answer to my question, because I've been answered already:
by javum
Hi!
Except CPU there is another parts in the radio scheme (antenna, converters, etc). So you can't use another band mode frequency if it is not supported in hardware.
Lenovo produces the same devices for China and Europe. The system firmware (ROM) is fully compatible with both versions, but European versions has 900MHz 3G and Chinese version doesn't. If people flashes modem software from european to chinese devices - the can see 900MHz 3G in Engineer mode, but it don't work...
So I say "no" for whole you question. You can't make it supported...
:crying:
but the hope dies last:
http://www.gizchina.com/2014/02/22/jiayu-s2-receives-network-license/
hope that this sexy baby will have international versions of itself !!!

I am having similar problem.....
cpurage said:
Hi All,
As all we know the WCDMA 800/850/900/1900/2100 Mhz is only a mirage, because we all know that the in example the JIAYU G4T is supporting ONLY WCDMA-IMT-2000 (which is the WCDMA 2100Mhz)..........
:
Click to expand...
Click to collapse
Here's my problem....
I have a Blu Life One M phone. It's a rebadged and "Americanized" Micromax Magnus A117. So I can flash roms for the A117 and they work great, except for the data modem. My phone supports HSDPA+ 42Mbps band (850,1700,1900 UMTS). Problem is that the India version of the phone A117 only can support GSM band (850,900,1800,1900). SO, If I have the Blu roms flashed...I get a HSDPA (about half that high speed listed though but a big improvement). With any of the India roms (inc, Cyanogen and such) I can only get GSM band. Sloooow. The engineering menu shows choices to tick the boxes to include the other freqs I want...but they are grayed out.
So, to have all the nifty cool rom stuff, I have to go WiFi only. To go plain Jane gives me the high data speed.
Any way to get those choices un-grayed....or do I have the Rosetta stone of making these changes...or go back to stock and dream ???
Thanks for any info.....
BTw.. It is a MTK 6589t SoC.
Jeff

I have the same problem
blu-madmax said:
Here's my problem....
I have a Blu Life One M phone. It's a rebadged and "Americanized" Micromax Magnus A117. So I can flash roms for the A117 and they work great, except for the data modem. My phone supports HSDPA+ 42Mbps band (850,1700,1900 UMTS). Problem is that the India version of the phone A117 only can support GSM band (850,900,1800,1900). SO, If I have the Blu roms flashed...I get a HSDPA (about half that high speed listed though but a big improvement). With any of the India roms (inc, Cyanogen and such) I can only get GSM band. Sloooow. The engineering menu shows choices to tick the boxes to include the other freqs I want...but they are grayed out.
So, to have all the nifty cool rom stuff, I have to go WiFi only. To go plain Jane gives me the high data speed.
Any way to get those choices un-grayed....or do I have the Rosetta stone of making these changes...or go back to stock and dream ???
Thanks for any info.....
BTw.. It is a MTK 6589t SoC.
Jeff
Click to expand...
Click to collapse
Hi team, when I install stock ROM Cloudfone Excite Prime only support WCDMA IMT 2000, in my country 3G not connect.
When I flash BLU LIFE XL stock ROM I got this basebands 3G enable (WCDMA-PCS-1900, WCMD-AWS- 1700, WCDMA-CLR-650)
The cuestion is how can I change the baseband, what is the file than I change?
Please help me, thanks

Related

Discussion of Huawei A199

Let's start discuss of the latest phone by Huawei - A199
Debut price at RMB 1999. Value for money?
Looking forward any expert for the custom roms (google friendly)
Bought
yenyang said:
Let's start discuss of the latest phone by Huawei - A199
Debut price at RMB 1999. Value for money?
Looking forward any expert for the custom roms (google friendly)
Click to expand...
Click to collapse
I bought it on 18 May 2013. still trying now~~
Unlocked Huawei A199
Hi
I bought it in China and cannot use the CDMA slot for Indonesia number.
Anyone know how to unlocked CDMA slot in this phone? How to root and change ROM for international use?
Thanks
hola soy marquez864
Hi I everything I have found on this phone is at anzhi page, there is everything from rom official until cooked rom that if all Chinese so that use the google chrome with your translator
arifzal said:
Hi
I bought it in China and cannot use the CDMA slot for Indonesia number.
Anyone know how to unlocked CDMA slot in this phone? How to root and change ROM for international use?
Thanks
Click to expand...
Click to collapse
i‘m afraid that there’ll be a few custom rom for A199,for the k3v2 cpu,it is special,which needs to confirm the boot.imgfile all the time,unless Huawei would unlock this structure.the models like A199,such as Huawei P6,U9508,Mate,etc all have this sort of question
on Anzhi page ,chinese developers only ported miui for them due to miui uses the same boot file.
you can browse the page.
good luck!
Huawei is introducing its latest product called P6.
huawei a199
This is the thread that I have found to have official rom and custom rom for this phone, with large capacity
rangerwill said:
i‘m afraid that there’ll be a few custom rom for A199,for the k3v2 cpu,it is special,which needs to confirm the boot.imgfile all the time,unless Huawei would unlock this structure.the models like A199,such as Huawei P6,U9508,Mate,etc all have this sort of question
on Anzhi page ,chinese developers only ported miui for them due to miui uses the same boot file.
you can browse the page.
good luck!
Click to expand...
Click to collapse
rangerwill said:
i‘m afraid that there’ll be a few custom rom for A199,for the k3v2 cpu,it is special,which needs to confirm the boot.imgfile all the time,unless Huawei would unlock this structure.the models like A199,such as Huawei P6,U9508,Mate,etc all have this sort of question
on Anzhi page ,chinese developers only ported miui for them due to miui uses the same boot file.
you can browse the page.
good luck!
Click to expand...
Click to collapse
is there any thread on anzhi to hack the cdma slot? becoz I just find hack for gsm only.
anyway, my friend has an unlocked huawei a199 (the cdma slot), how can I dump his ROM and restore it to mine?
thanks. :victory:
CWM recovery
Hello!
Does somebody have CWM or TWRP recovery for this phone?
arifzal said:
Hi
I bought it in China and cannot use the CDMA slot for Indonesia number.
Anyone know how to unlocked CDMA slot in this phone? How to root and change ROM for international use?
Thanks
Click to expand...
Click to collapse
rangerwill said:
i‘m afraid that there’ll be a few custom rom for A199,for the k3v2 cpu,it is special,which needs to confirm the boot.imgfile all the time,unless Huawei would unlock this structure.the models like A199,such as Huawei P6,U9508,Mate,etc all have this sort of question
on Anzhi page ,chinese developers only ported miui for them due to miui uses the same boot file.
you can browse the page.
good luck!
Click to expand...
Click to collapse
I found some posts on the ROM from Chinese Flashing Forum web: shuajizhijia.com/huawei/a199/
Anybody know whether flashing my A199 with one of those ROM will allow the use of other provider's CDMA SIM card?
Thanks.
Ok.. so now I managed to flash my phone with one of the ROM downloaded from Shuajizhi, but my A199 still doesn't read my CDMA card...
Do I need to root my phone first? How can I install gApps on my phone?
Thanks for any help..
I finally got my phone unlocked, now i need to back up NV items... i tried using the NV item reader/writer but the back text files shows "Unknown Error" on all items.. anybody have any other solutions?
AREK28 said:
I finally got my phone unlocked, now i need to back up NV items... i tried using the NV item reader/writer but the back text files shows "Unknown Error" on all items.. anybody have any other solutions?
Click to expand...
Click to collapse
Hi,
How you got your phone unlocked? Can you explain please? I also have A199 with cdma part locked
Hi guys,
I've buy one A199 when I was in China for work 4 months ago , now I'm returned in Europe but my phone company use only 3g and this phone actually use only 2g line.
Now my question are , There is european firmware for this phone?
It's possible to unlock 3g line and /or there are custom roms for european use?
And the last question is , It's possible to add android market? because actually if I download the app, it isn't possible to open
Thanks in advance for your response
bikermao said:
Hi guys,
I've buy one A199 when I was in China for work 4 months ago , now I'm returned in Europe but my phone company use only 3g and this phone actually use only 2g line.
Now my question are , There is european firmware for this phone?
It's possible to unlock 3g line and /or there are custom roms for european use?
And the last question is , It's possible to add android market? because actually if I download the app, it isn't possible to open
Thanks in advance for your response
Click to expand...
Click to collapse
If you mean to use 3g in GSM card slot - no, you cannot, it is only for GSM 900/1800 Mhz, but not for HSDPA 2100 Mhz. CDMA card slot you can use only for cdma 800 Mhz also. As to Google account and market - sure you can. You need to root your phone first with a help of EROOT program . Then use gapps-jb-20121011-signed . I suggest to do this all on clean last firmware version CV100R001C92B130 .
ag70 said:
If you mean to use 3g in GSM card slot - no, you cannot, it is only for GSM 900/1800 Mhz, but not for HSDPA 2100 Mhz. CDMA card slot you can use only for cdma 800 Mhz also. As to Google account and market - sure you can. You need to root your phone first with a help of EROOT program . Then use gapps-jb-20121011-signed . I suggest to do this all on clean last firmware version CV100R001C92B130 .
Click to expand...
Click to collapse
Thanks ag70 ,
now I try to root my phone and install the market
Bricked a199
hello all, i bought this phone online. Now the condition is brick. anyone can give me a solution?
if the power button is pressed, only vibrate once and lcd dead
if connected on a pc, there are no new devices
I can not charge the battery
can you put the phone in recovery mode ?
How did you unlock the gsm slot
Sent from my HUAWEI A199 using XDA Free mobile app

[Q] SO-03E - changing working LTE basebands?

I have a DoCoMo SO-03E and also an SGP321. I have successfully de-branded the SO-03E to an SGP321. Comparing the two tablets, they are identical (after applying the old firmware system to get the 32Gig partition back).
The only issue I've hit has been with LTE in that it has maintained the DoCoMo LTE "working bands" as viewed from the hidden system menu which are 1, 19 and 21 which aren't applicable here in Australia! So it appears that the LTE working bands are part of the firmware of the SnapDragon chip (which has an integrated radio) and hence not changed via the FTF image.
Does anyone know how or if these can be changed via an API/SDK from Qualcomm (if possible) so that the true SGP321 working bands can be applied to the SO-03E to convert it to a true SGP321 with 32gig of internal flash? Looking at the snapdragonS4 pro data sheets and looking at the Sony description of both tablets that state they both use the Snapdragon S4 pro, I would think there is some EEPROM or memory address that could be updated to tell the SnapDragon that it can use the other LTE bands!?? Maybe Sony has the Snapdragon chips configured in batches - those for DoCoMo with 32gig internal flash and those for the rest of the world - SGP321?
Any ideas as to whether this is possible?
Im in your shoes to!
My DoCoMo is debranded with sgb321 and would love to be able to use LTE instead of 3g
I did read somewhere tho that a part of the hardware is different and isnt possibke to do what u want.
Letz hope I read wrong!
If there is an SDK available and the memory space which holds the configuration details for LTE is available then it may be possible. If not, we're stuck with the DoCoMo LTE bands
I was so hoping the firmware re-programed the radio. The issue is the radio is integrated into the Snapdragon S4 Pro chip and not a separate chip.
spyderboyant said:
I have a DoCoMo SO-03E and also an SGP321. I have successfully de-branded the SO-03E to an SGP321. Comparing the two tablets, they are identical (after applying the old firmware system to get the 32Gig partition back).
The only issue I've hit has been with LTE in that it has maintained the DoCoMo LTE "working bands" as viewed from the hidden system menu which are 1, 19 and 21 which aren't applicable here in Australia! So it appears that the LTE working bands are part of the firmware of the SnapDragon chip (which has an integrated radio) and hence not changed via the FTF image.
Does anyone know how or if these can be changed via an API/SDK from Qualcomm (if possible) so that the true SGP321 working bands can be applied to the SO-03E to convert it to a true SGP321 with 32gig of internal flash? Looking at the snapdragonS4 pro data sheets and looking at the Sony description of both tablets that state they both use the Snapdragon S4 pro, I would think there is some EEPROM or memory address that could be updated to tell the SnapDragon that it can use the other LTE bands!?? Maybe Sony has the Snapdragon chips configured in batches - those for DoCoMo with 32gig internal flash and those for the rest of the world - SGP321?
Any ideas as to whether this is possible?
Click to expand...
Click to collapse
How did you manage to debrand the SO-03E?
I tried to flash the SGP321 firmware onto my SO-03E with flashtool but it wouldn't flash.
I have successfully flashed the tablet a couple of times using the flashtool. The last time excluding system with the latest so-03e image to get the 32gig partition back..
what did the flashtool say when you tried to flash the new firmware? Mu tablet is locked and not rooted.
spyderboyant said:
I have successfully flashed the tablet a couple of times using the flashtool. The last time excluding system with the latest so-03e image to get the 32gig partition back..
what did the flashtool say when you tried to flash the new firmware? Mu tablet is locked and not rooted.
Click to expand...
Click to collapse
I can't remember what the error was it was a while back when someone first posted the SGP321 firmware. it must have been a bad file or something, I just downloaded the latest firmware and flashed and it worked.
Can you explain how to get my 32gb partition back? do i just flash the So-03e image and tick system in the exclude section, and I will still be on sgp321 stock firmware but with 32gb partition?
thanks for your help!
yep. flash an SO-03E image and make sure you select "system" to ignore
spyderboyant said:
yep. flash an SO-03E image and make sure you select "system" to ignore
Click to expand...
Click to collapse
thanks! will try that tonight!
as for the LTE bands, no one seems to even confirm if the hardware actually supports the other bands, and the tablet z doesn't seem popular enough for enough people to look into this. let alone the s0-o3e is even less common.
fingers crossed!
electric0ant said:
thanks! will try that tonight!
as for the LTE bands, no one seems to even confirm if the hardware actually supports the other bands, and the tablet z doesn't seem popular enough for enough people to look into this. let alone the s0-o3e is even less common.
fingers crossed!
Click to expand...
Click to collapse
Looking into the specifications for the Snapdragon S4 Pro, the LTE radio is included in the chip which means that its actually in the Snapdragon code, not Android. Hence, if there is some EEPROM memory somewhere on the chip that allows for the programming of the LTE bands via a SnapDragon Software Development Kit (SDK) then it may be possible to update/change the bands. This would take some serious low level knowledge of the chip. I actually started looking at the Snapdragon data sheets and sdk examples and unfortunately no where did they mention changing settings for the radio..... I think there would be some demand for the ability to do this as the SGP321 doesn't support the LTE bands of some of the USA carriers... Supposedly the Qualcomm radios are the only ones at the moment that support ALL LTE bands... Obviously device manufacturers and carriers can limit the LTE bands which makes me think there are no different flavours of the chips and that it is the device manufacturers that are selecting/locking the bands.

[Q] ROM swap

hi guys, thanks for all the info, by far the best android site on the web.
I am looking to do a rom swap on a gti8552 currently running android 4.1.2 baseband i8552ddamgi kernel 3.4.0-1293443 build j2054k.18552xxamgi.
the problem is the current rom is pcs1900 only, so no 3g, just edge speeds. i am looking to install a rom that will make the phone a true quad-band capable of 4g. does anyone know if the hardware is the same across all 8552 phones, and if the trinidad region rom is quad band?
sonnyisnothere said:
hi guys, thanks for all the info, by far the best android site on the web.
I am looking to do a rom swap on a gti8552 currently running android 4.1.2 baseband i8552ddamgi kernel 3.4.0-1293443 build j2054k.18552xxamgi.
the problem is the current rom is pcs1900 only, so no 3g, just edge speeds. i am looking to install a rom that will make the phone a true quad-band capable of 4g. does anyone know if the hardware is the same across all 8552 phones, and if the trinidad region rom is quad band?
Click to expand...
Click to collapse
that is impossible, the QUALCOMM 3G CDMA doesn't support 4G connection. :crying:

Is it possible to modify 4G bands support by flashing Radio from E975 (International)

I am using an unlocked AT&T E970. But in my country(India), 4G operators use a different frequency for LTE (Band 3, 5 and 40). So I am not able to use LTE in my phone, but the E975 (International) version sold here in India works fine with all LTE bands. So.. I was wondering is it possible to flash just the Radio from E975 into this phone. I am willing to give it a try. If this is possible, then can you guys tell me where can I find such a flashable radio file from E975?
I tried flashing a custom ROM (Sling Kahroba) built for E975 into my E970. But, it didn't work.
I tried unlocking bands by changing NV values., but no luck . I wanted band 3 or 5 or 40 .
I am on Nitrogen OS Geeb.
Plz help us changing band i am also not receiving the lte network in jio sim
nizarp said:
I am using an unlocked AT&T E970. But in my country(India), 4G operators use a different frequency for LTE (Band 3, 5 and 40). So I am not able to use LTE in my phone, but the E975 (International) version sold here in India works fine with all LTE bands. So.. I was wondering is it possible to flash just the Radio from E975 into this phone. I am willing to give it a try. If this is possible, then can you guys tell me where can I find such a flashable radio file from E975?
I tried flashing a custom ROM (Sling Kahroba) built for E975 into my E970. But, it didn't work.
Click to expand...
Click to collapse
I too am from India and have an LG E975 but JIO 4g doesn't seem to work in my phone and i can't test other operators (SIMs) because its the only one available here (J&K).. Can you guide me to make jio 4g work with my phone... I'll be greatly thankful...
Sent from my LG-E975 using XDA-Developers mobile app
m90ultimate said:
I tried unlocking bands by changing NV values., but no luck . I wanted band 3 or 5 or 40 .
I am on Nitrogen OS Geeb.
Click to expand...
Click to collapse
I got this from a friend he says this will work. Try it
In qxdm , nv browser, LTE, change 6828-6829-65633 to 1649267441684
Delete the original values
3-5-40-41 will be obtained
pls sir radio file link send me pls
LG Optimus G E970 radio file link reply

Can i convert a US version device to Europe?

Hello,
I was wondering if is possible to flash Europe's model Firmware on US model,and get the device work?
I want to do this because I am in Europe and I cannot connect to LTE networks because my oneplus X is US version. So I want to change the firmware to european version to be able to connect to band 3 - 1800Mhz networks that are not supported on US version.
If this is not possible, is there any solution to change the frequency and the band of the device?
Thank you
The firmware is the same. It's the hardware that change.
You can't do anything about that I'm afraid..
https://forums.oneplus.net/threads/oneplus-x-regional-versions.398205/
Sorry forgot to mention that it's the antenna :
https://www.reddit.com/r/oneplus/comments/4hvcrt/is_it_possible_to_switch_the_opx_from_european/
Hello, thanks for your answer.
I saw this article : https://forum.xda-developers.com/oneplus-3/how-to/guide-unlock-additional-lte-bands-t3519563
and that is why I was wondered if is possible to work on our onyx device.
I knew it was possible on some Xiaomi devices too, but I didn't know some OP could do it too...

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