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Hi members!
I own an officially unlocked SM-N910T mobile (updated to latest MM 6.0.1) and currently using it in India. I can use 4g LTE for data but VoLTE doesn't work on my phone.
My network operator JIO provides LTE/VoLTE on Band 3, 5 and 40. I have enabled VoLTE from Settings > Calls > Call settings but no joy
VoLTE is enabled on my SIM and I can use it on another mobile.
I have been trying to understand what could be the issue over last 2 weeks but without any satisfactory answer from anyone.
So, I am wondering:
1. Is it because I don't have Indian CSC on my T-mobile phone? Is it even possible to flash Indian CSC on this device?
2. Is it because my device IMEI is 'NOT -INDIAN IMEI" and hence not supported? Customer care gives me more confusing answers - sometimes they say my phone is compatible for VoLTE and some say only Indian devices are supported.
3. Is something still locked to TMOBILE even after the official unlock?
Any answers are really appreciated from the any of you!
Cheers and thanks in advance!
Kamaldev.kd said:
Hi members!
I own an officially unlocked SM-N910T mobile (updated to latest MM 6.0.1) and currently using it in India. I can use 4g LTE for data but VoLTE doesn't work on my phone.
My network operator JIO provides LTE/VoLTE on Band 3, 5 and 40. I have enabled VoLTE from Settings > Calls > Call settings but no joy
VoLTE is enabled on my SIM and I can use it on another mobile.
I have been trying to understand what could be the issue over last 2 weeks but without any satisfactory answer from anyone.
So, I am wondering:
1. Is it because I don't have Indian CSC on my T-mobile phone? Is it even possible to flash Indian CSC on this device?
2. Is it because my device IMEI is 'NOT -INDIAN IMEI" and hence not supported? Customer care gives me more confusing answers - sometimes they say my phone is compatible for VoLTE and some say only Indian devices are supported.
3. Is something still locked to TMOBILE even after the official unlock?
Any answers are really appreciated from the any of you!
Cheers and thanks in advance!
Click to expand...
Click to collapse
It may be a regional thing. My 910t uses volte on straight talk in the states with an att sim with no issues. Surprised me actually.
Same problem for me too.. I too own N910T.. Volte is enabled but Call failed error comes again nd again..... Can Anyone please help out....
did anyone found answer for this question?
jio VoLTE in t-mobile note 4
anantharam3 said:
did anyone found answer for this question?
Click to expand...
Click to collapse
https://forum.xda-developers.com/showpost.php?p=70484835&postcount=21
devbiju said:
https://forum.xda-developers.com/showpost.php?p=70484835&postcount=21
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Click to collapse
Hi devbiju, thanks for pointing me to the post, but more help is appreciated. I did change my rom to RAM-rom. how do i set the IMS-APN. whenever i add the IMS apn, it doesn't stick
Please help.
anantharam3 said:
Hi devbiju, thanks for pointing me to the post, but more help is appreciated. I did change my rom to RAM-rom. how do i set the IMS-APN. whenever i add the IMS apn, it doesn't stick
Please help.
Click to expand...
Click to collapse
After RAM Rom installation you can flash INU CSC, Dr Ketan uploaded it in some threads which i forgot.
for IMS apn , you simply create new APN with name and type as IMS and save it. It may not be listed or need not be selected in APNs list. but you could see the VoLTE in status bar after creating it. Also ensure that you create jionet APN first to get LTE access instead of using default jio APN settings.
devbiju said:
After RAM Rom installation you can flash INU CSC, Dr Ketan uploaded it in some threads which i forgot.
for IMS apn , you simply create new APN with name and type as IMS and save it. It may not be listed or need not be selected in APNs list. but you could see the VoLTE in status bar after creating it. Also ensure that you create jionet APN first to get LTE access instead of using default jio APN settings.
Click to expand...
Click to collapse
thanks mate, figured that out..
gunz.jones said:
It may be a regional thing. My 910t uses volte on straight talk in the states with an att sim with no issues. Surprised me actually.
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Click to collapse
I have a unlocked 910-T on Cricket and I can't use WiFi calling or VoLTE. And I got there new SIM card and still no go.
Most posts I am seeing about unlocking bootloader and custom roms are for XT1921-5. I cannot seem to find this phone anywhere. Is this the USA variant? The closest I have found is the XT1921-3 (Boost Mobile) variant here
https://www.bestbuy.com/site/boost-...mory-cell-phone-black/6221728.p?skuId=6221728
Would I able to bootloader unlock and install custom roms on this? I'm looking for a backup phone that has LTE 2,4,5,12,13,17,25,26,41,66 bands and this one is perfect but I need to know if I will be able to unlock bootloader and install custom rom.
I can't find any good information about the different variants and what models support what bands and which models can be rooted.
Any help is much appreciated, thanks
Knuxyl said:
Most posts I am seeing about unlocking bootloader and custom roms are for XT1921-5. I cannot seem to find this phone anywhere. Is this the USA variant? The closest I have found is the XT1921-3 (Boost Mobile) variant here
https://www.bestbuy.com/site/boost-...mory-cell-phone-black/6221728.p?skuId=6221728
Would I able to bootloader unlock and install custom roms on this? I'm looking for a backup phone that has LTE 2,4,5,12,13,17,25,26,41,66 bands and this one is perfect but I need to know if I will be able to unlock bootloader and install custom rom.
I can't find any good information about the different variants and what models support what bands and which models can be rooted.
Any help is much appreciated, thanks
Click to expand...
Click to collapse
I'm just doing "get a free phone from MetroPCS" due diligence so I don't have the phone in hand, but it looks like the XT1921-3 is actually the T-Mobile/MetroPCS (USA) version, which has been problematic for ppl. Good news is that it now has a factory image available (see thread here, although no clear reports on that yet . . . one seems to imply there was a problem with it, but I'm not totally clear).
So I'm not by any means an expert on Motorola firmware, but I'd be surprised if Boost (CDMA, right?) had the same model # as T-Mobile (GSM)--and I'm a little overtired but didn't see any note of the Motorola model # on the Best Buy link you provide.
In any case, not sure about bands and such, but hope that tidbit helps a little, in case you do in fact need something for the T-Mobile variant (-3), or if it's the same as Boost and I'm just a moron.
1921-2is cricket
Sent from my e5 cruise using XDA Labs
1921-e5
I have this model from boost 1921-e5
So I was about to buy the phone but wanted to verify LTE bands first. The seller lists B17 support, but the Mi9 web page at Xiaomi's site does NOT list band 17 support. I find this strange, since the Mi8 does support B17 and the Mi Mix 3S supports B17. So Is there any real confirmation on whether the Mi 9 does or does not support this LTE band? Is the lack of it being listed at Xiaomi site just a type?
4G LTE FDD:B1/B2/B3/B4/B5/B7/B8/B12/B17
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Click to collapse
4G: FDD LTE B3:1800/B1:2100/B7:2600/B5:850/B8:900/B2/B4:1700/B12/B17
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Click to collapse
https://www.aliexpress.com/item/Xia...agon-855-Octa-Core-6-39-48MP/32974093932.html
https://www.aliexpress.com/item/Xia...9-Snapdragon-855-Octa-Core-6/32976448415.html
and yet:
https://www.mi.com/global/mi9/specs/
4G：LTE FDD： B1/2/3/4/5/7/8/12/20/28
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Click to collapse
EDIT: ok, so the internation page and version of the phone does not mention B17 support. However the Chinese page DOES list B17 support on their model:
https://www.mi.com/mi9/specs/
4G：LTE FDD：B1/B2/B3/B4/B5/B7/B8/B12/B17
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Click to collapse
So does that mean only Chinese versions support this and I must buy Chinese version and run Chinese ROM to get band 17 support to work with ATT? I would rather flash to Global ROM, but I am thinking that Global kernel or other firmware may remove B17 support? Can the Global ROM be run on China firmware? They do say China ROM support English....
EniGmA1987 said:
So does that mean only Chinese versions support this and I must buy Chinese version and run Chinese ROM to get band 17 support to work with ATT? I would rather flash to Global ROM, but I am thinking that Global kernel or other firmware may remove B17 support? Can the Global ROM be run on China firmware? They do say China ROM support English....
Click to expand...
Click to collapse
I'd definitely trust Xiaomi's official site more than anywhere else, if you check Xiaomi's official site for Spain (which sells the Global variant) it doesn't list band 17..
Flashing Global on a Chinese device or vice versa doesn't affect the bands as far as I'm aware, there's evidence of Xiaomi hardware locking the bands on the Pocophone, forum links below:
https://forum.xda-developers.com/poco-f1/help/poco-f1-lte-bands-unlock-t3835467
https://forum.xda-developers.com/poco-f1/how-to/pocophone-lte-band-unlock-report-t3848193
If you buy a Chinese Mi 9 then you should be able to flash the Global ROM, same as all previous Xiaomi's, however you have to keep the bootloader unlocked once flashed, trying to relock will result in a brick
These steps were for a MI Note, but may work with the MI 9:
https://forum.xda-developers.com/redmi-note/general/unlock-lte-bands-step-step-xiaomi-mi-t3084774
TheInfiniteAndroid said:
I'd definitely trust Xiaomi's official site more than anywhere else, if you check Xiaomi's official site for Spain (which sells the Global variant) it doesn't list band 17..
Flashing Global on a Chinese device or vice versa doesn't affect the bands as far as I'm aware, there's evidence of Xiaomi hardware locking the bands on the Pocophone, forum links below:
https://forum.xda-developers.com/poco-f1/help/poco-f1-lte-bands-unlock-t3835467
https://forum.xda-developers.com/poco-f1/how-to/pocophone-lte-band-unlock-report-t3848193
If you buy a Chinese Mi 9 then you should be able to flash the Global ROM, same as all previous Xiaomi's, however you have to keep the bootloader unlocked once flashed, trying to relock will result in a brick
Click to expand...
Click to collapse
TheInfiniteAndroid said:
I'd definitely trust Xiaomi's official site more than anywhere else, if you check Xiaomi's official site for Spain (which sells the Global variant) it doesn't list band 17..
Flashing Global on a Chinese device or vice versa doesn't affect the bands as far as I'm aware, there's evidence of Xiaomi hardware locking the bands on the Pocophone, forum links below:
https://forum.xda-developers.com/poco-f1/help/poco-f1-lte-bands-unlock-t3835467
https://forum.xda-developers.com/poco-f1/how-to/pocophone-lte-band-unlock-report-t3848193
If you buy a Chinese Mi 9 then you should be able to flash the Global ROM, same as all previous Xiaomi's, however you have to keep the bootloader unlocked once flashed, trying to relock will result in a brick
Click to expand...
Click to collapse
Thanks for the reply. I ended up buying the chinese version phone just now since that is the one Xiaomi says supports the bands I need. I will work on it when I get the phone in and verify whether I can unlock and install global ROM and still have the bands :good:
Thank you for your help
EniGmA1987 said:
Thanks for the reply. I ended up buying the chinese version phone just now since that is the one Xiaomi says supports the bands I need. I will work on it when I get the phone in and verify whether I can unlock and install global ROM and still have the bands :good:
Thank you for your help
Click to expand...
Click to collapse
Be sure to report back man, good luck, & glad I could help!
EniGmA1987 said:
Thanks for the reply. I ended up buying the chinese version phone just now since that is the one Xiaomi says supports the bands I need. I will work on it when I get the phone in and verify whether I can unlock and install global ROM and still have the bands :good:
Thank you for your help
Click to expand...
Click to collapse
I also ordered the Chinese version because it has 4 LTE bands for T-Mobile
Amy news guys about thé bands on the chinese version ans installing thé global rom ?
kira-senpai said:
Amy news guys about thé bands on the chinese version ans installing thé global rom ?
Click to expand...
Click to collapse
The Chinese version has the proper USA LTE Bands. It doesn't have band 20 for Europe
jvs60 said:
The Chinese version has the proper USA LTE Bands. It doesn't have band 20 for Europe
Click to expand...
Click to collapse
Where do you buy Chinese version from?
StDevious said:
Where do you buy Chinese version from?
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Click to collapse
TradingShenzhen, AliExpress, Banggod.
Myself and a few others have had very good service through TradingShenzhen.
Is there a global version ith 8Gb of RAM ?
kira-senpai said:
Is there a global version ith 8Gb of RAM ?
Click to expand...
Click to collapse
No
I'm seeing some contrary information out there about what phone has what bands. Is there a code I can enter in dialer to see all available bands on my device? All I see is that I'm currently connected with B2 in *#*#4636#*#* and various apps I've picked up. I'm wanting to see exactly what's available in the device in my hand rather than specs on 4 different websites(with different values). The primary website I'm looking at is showing me I made a mistake with getting the 8/256 transparent china rather than the 12/256 but I'd really like to know for sure(especially since I'm currently not experiencing any problems with AT&T). It was easy with my W10M phone(##2382#) but I'm a bit lost with Android.
Unfortunately for me it didn't work. Like I said, 4G + appears on my phone screen, but the apps don't connect and I can't even use the browser because it says I'm not connected. Already tried to fix APN settings, checked if I had LTE on, but nothing worked. The internet only works if I have H+ on the screen. And now I have another problem: I downloaded my original parameters before switching to the modified ones, but now when resetting my original parameters and restarting, the phone remains without a network signal. The IMEI numbers are correct, the settings are ok, but I still have no network signal. Does anyone know how to fix this, or have the original .xqcn file to send me? Thanks.
fafuzito said:
Unfortunately for me it didn't work. Like I said, 4G + appears on my phone screen, but the apps don't connect and I can't even use the browser because it says I'm not connected. Already tried to fix APN settings, checked if I had LTE on, but nothing worked. The internet only works if I have H+ on the screen. And now I have another problem: I downloaded my original parameters before switching to the modified ones, but now when resetting my original parameters and restarting, the phone remains without a network signal. The IMEI numbers are correct, the settings are ok, but I still have no network signal. Does anyone know how to fix this, or have the original .xqcn file to send me? Thanks.
Click to expand...
Click to collapse
are you posting in the wrong thread? there are no instructions in this thread.
Hello. 5G network is comming soon . I make today method for unlock 5G on 700mhz for this device . Problematic is only icon od network because 5G network is visible as 4G (have only 4G icon , but work in 5G mode , speedtest say the same) . Unlock method to avalaible soon , and publish in this thread . This method unlock all bands supported by device . Avalaible info about device is on frequencycheck.com with all bands . Unlocked all bands is visible on screenshot's in atach . What do you think about 5G on this device ???? Unlock 5G working only in european region devices and global . Devices from other regions have only unlocked new bands , I don't test this method on devices from other regions .
What you need to do that:
1.Any Qualcomm device - with this guide you unlock only Qualcomm cpu devices
2.NV values
3.QPST and QXDM for edit values
4.Installed lineageos with magisk
5.Network guru app for enable new bands after correct programing
6.ADB and FASTBOOT - with drivers to device too
7.Minimum 1 hour for do that
OK. Let's go:
Download drivers and flash lineageos with twrp - you need to install magisk and lineageos - Method for unlock don't work with stock miui .
Install drivers and turn on developer settings in your device and check 3 adb options for correct set all .
If you have magisk and lineagos , you can start adb and write command adb shell , in shell you need to write and press enter this command setprop sys.usb.config diag .
Start QPST and add port
Start QXDM , and find nv values (look down)
Change values and press write - do the same for second sim card (look up on qxdm and check dual sim , set this values for 0 and 1 if no possible you brick your device without option recovery signal. Write values to 0 and 1 after write press read and check . Do that with all values . Make copy of your values to notepad txt file for your safety . Reboot device , install network signal guru and lock all bands in 2G,3G,CDMA,4G . Device find 5G network on 700mhz as ''4G'' network because radio don't have icon and name for 5G .
More info and know how soon if i find some time for do that.
NV values:
0441: 0x780
0946: 0x0FF8
1877: 3460734838925428608
2954: 268894208
6828: 17591112253439
6829: 17591112253439
For enable total all bands in this device or other device with qualcomm cpu you must enter this values:
NV values:
0441: 0xFFFF
0946: 0xFFFF
1877: 18446744073709551615
2954: 4294967295
Values for LTE is not changed (LTE 6828 and 6829)
6828: 17591112253439
6829: 17591112253439
This values working on all rooted devices with qualcomm cpu inside with all wariants of cpu. If you want to share or publish this values write to me pm.
IMPORTANT: You must disable unused bands in EU if you are in EU in this app by uncheck in lock bands option CDMA frequencies . If you don't do that , your device to be scan all bands next five minutes than find signal !! If you are in other country , you can find in google frequencies used in your country and enable it only .
If you use my guide please press thanks
reserved
Tweaked system and unlocked radio give better speed of internet.
Why aren't you posting this?
DebrupGhosh said:
Why aren't you posting this?
Click to expand...
Click to collapse
1.Mod move my thread here , from software development
2.I make test's with radio and calculations - possibly I unlock to 5G for 3,5Ghz+ if documentation of soc allow me for do that
3.I makeing know/how for users with instruction how to unlock radio
4.I make patched lineageos based on last available (look up) , with deodex for next unlocking
5.I need testers listen to me how to do all step by step , because one mistake, one point not do and you have hard brick radio and phone without signal ... i must end my work , users must have lineageos for correct unlock because magisk with stock rom not working and device don't have su libaries and busybox needed for unlock . Users and you bro must wait not too long . Say me what is your contry , i need to check bands for lte in your country and what is your model - I have from -EG series (backside phone have model) ????
MAREK10747 said:
1.Mod move my thread here , from software development
2.I make test's with radio and calculations - possibly I unlock to 5G for 3,5Ghz+ if documentation of soc allow me for do that
3.I makeing know/how for users with instruction how to unlock radio
4.I make patched lineageos based on last available (look up) , with deodex for next unlocking
5.I need testers listen to me how to do all step by step , because one mistake, one point not do and you have hard brick radio and phone without signal ... i must end my work , users must have lineageos for correct unlock because magisk with stock rom not working and device don't have su libaries and busybox needed for unlock . Users and you bro must wait not too long . Say me what is your contry , i need to check bands for lte in your country and what is your model - I have from -EG series (backside phone have model) ????
Click to expand...
Click to collapse
From india, I've EI series
DebrupGhosh said:
From india, I've EI series
Click to expand...
Click to collapse
Your device is fully support all bands in your country . https://www.frequencycheck.com/compatibility/05AZu0k/xiaomi-redmi-7a-dual-sim-td-lte-in-32gb-m1903c3ei-mzb7989in-mzb7800in-mzb8008in-xiaomi-pine/india .
Unlock bands for you don't do for you to much . But if you want to have option select band for faster internet do somthing for you . You need to install lineageos and to lineageos magisk and app guru network from play store .After unlock bands you find in network guru extra bands . You can try to check what what's band after select to be faster for you .
Soo... After update unlocked is all bands avalaible for this CPU . Actually soon I publish how to unlock all bands + 5Ghz Wi-Fi mode . All bands working correct.
MAREK10747 said:
Your device is fully support all bands in your country . https://www.frequencycheck.com/compatibility/05AZu0k/xiaomi-redmi-7a-dual-sim-td-lte-in-32gb-m1903c3ei-mzb7989in-mzb7800in-mzb8008in-xiaomi-pine/india .
Unlock bands for you don't do for you to much . But if you want to have option select band for faster internet do somthing for you . You need to install lineageos and to lineageos magisk and app guru network from play store .After unlock bands you find in network guru extra bands . You can try to check what what's band after select to be faster for you .
Click to expand...
Click to collapse
Can you enable carrier aggregation in this mobile???
And by 5g you meant 5ghz wifi or 5g mobile network? If it's 5g mobile network unlock then may i use your guide?
---------- Post added at 03:24 AM ---------- Previous post was at 03:19 AM ----------
MAREK10747 said:
Your device is fully support all bands in your country . https://www.frequencycheck.com/compatibility/05AZu0k/xiaomi-redmi-7a-dual-sim-td-lte-in-32gb-m1903c3ei-mzb7989in-mzb7800in-mzb8008in-xiaomi-pine/india .
Unlock bands for you don't do for you to much . But if you want to have option select band for faster internet do somthing for you . You need to install lineageos and to lineageos magisk and app guru network from play store .After unlock bands you find in network guru extra bands . You can try to check what what's band after select to be faster for you .
Click to expand...
Click to collapse
Did you say unlock bands won't be of much help to me because my device has all indian bands and 5g is yet unavailable in india?
DebrupGhosh said:
Can you enable carrier aggregation in this mobile???
And by 5g you meant 5ghz wifi or 5g mobile network? If it's 5g mobile network unlock then may i use your guide?
Did you say unlock bands won't be of much help to me because my device has all indian bands and 5g is yet unavailable in india?
Click to expand...
Click to collapse
On my device after little ''re-work'' agregation working , but i testing now it . Working stable .
5G network on 700mhz , but 700mhz working only in EU and maybe in US . 5 GHZ wifi , i plan to enable because CPU support that . I don't know why wifi on 5Ghz is disable , but I enable it later .
In india 5G network working , but i'm not sure band .
MAREK10747 said:
On my device after little ''re-work'' agregation working , but i testing now it . Working stable .
5G network on 700mhz , but 700mhz working only in EU and maybe in US . 5 GHZ wifi , i plan to enable because CPU support that . I don't know why wifi on 5Ghz is disable , but I enable it later .
In india 5G network working , but i'm not sure band .
Click to expand...
Click to collapse
How to activate carrier aggregation?
DebrupGhosh said:
How to activate carrier aggregation?
Click to expand...
Click to collapse
First try to use lineageos + network guru app and unlock all bands to values from second values and reboot . In guru app disable all cdma bands , activate all wcdma , gsm , lte and reboot . This possbile activate it automaticly , if not add comment .
Big thanks for that, I didn't know that is possible. Here in Germany we have Band 28 (700 MHz) for LTE (But also for 5G). Will it also be activated when I follow your instructions, or only for 5G? LTE B32 (1500 MHz) would be good too. Could you name the values for it? Or a guide on how to find them out?
xuxu1 said:
Big thanks for that, I didn't know that is possible. Here in Germany we have Band 28 (700 MHz) for LTE (But also for 5G). Will it also be activated when I follow your instructions, or only for 5G? LTE B32 (1500 MHz) would be good too. Could you name the values for it? Or a guide on how to find them out?
Click to expand...
Click to collapse
Soo... Possbile you activate 2 bands 4G and 5G for 700mhz . You need only lineageos because i'm not sure how it working in stock rom . First published values unlock all bands of LTE and 5G too . For correct working please install network app guru , gapps
if you need , magisk for correct working of network guru app and lock bands all after unlock and reboot . If you after reboot lock in app all bands of lte you activate too 5G working . You can see in app band actually working , 700mhz working correct after unlock . I waiting for 700mhz in Poland because we don't have this band but i test in germany 700mhz (travel to germany in moment of tests 700mhz ) . Soon i Publish fixed lineageos for 5G and 4G network speed . My result of speed test in Poland after patch system and modem is actually : https://www.speedtest.net/my-result/a/6179268278 In Germany your speed test result can be faster than I have in Poland. You decide what you want to do with your device . 50% of unlocked bands for this device is here: https://www.frequencycheck.com/mode...al-dual-sim-td-lte-32gb-m1903c3eg-xiaomi-pine
MAREK10747 said:
First try to use lineageos + network guru app and unlock all bands to values from second values and reboot . In guru app disable all cdma bands , activate all wcdma , gsm , lte and reboot . This possbile activate it automaticly , if not add comment .
Click to expand...
Click to collapse
I can disable lte band but there is no option to disable cdma bands in network signal guru app
DebrupGhosh said:
I can disable lte band but there is no option to disable cdma bands in network signal guru app
Click to expand...
Click to collapse
give me screen shots
(deleted)
MAREK10747 said:
give me screen shots
Click to expand...
Click to collapse
See
DebrupGhosh said:
See
Click to expand...
Click to collapse
ok. possible is ok . Give next screen shot form LTE .
MAREK10747 said:
ok. possible is ok . Give next screen shot form LTE .
Click to expand...
Click to collapse
Lte
[GUIDE] Enable Carrier Aggregation [LTE+]
Hello ! Here is an easy guide to enable CA ( Carrier Aggregation ) in your violet. I won't be writing a long-ass guide, lets be on point. There are two seperate files, one for Jio & Airtel and another for VI (vodafone-idea). This seperation is...
forum.xda-developers.com
Above Posted link was found by me when I was browsing for ROM for my redmi Note 7 Pro. And in this thread you can see how to enable carrier aggregation into your device, the original poster clearly stated if you have different device then steps are same but you need to be very careful. This is my request can someone from this forum enable this onto our device who have good knowledge of modding?
Tried but it didnt work. Followed all the steps one by one...