Develop Bugs

[Q] no network after changing radio band

guys i am using htc desire 816 dual sim
yesterday i while changing network type from *#*#4636#*#*
i changed radio band ,i selected USA band .
from that moment device is not detecting any network,
after manually searching network screen remains blank.
i tried selecting other radio bands from the same list but no use
i dont want to root or flash my phone,
i am using Airtel gsm card mumbai circle.
attached file-details of phone
Is there any solution for above .Plse help asap

htcdesire816 said:
guys i am using htc desire 816 dual sim
yesterday i while changing network type from *#*#4636#*#*
i changed radio band ,i selected USA band .
from that moment device is not detecting any network,
after manually searching network screen remains blank.
i tried selecting other radio bands from the same list but no use
i dont want to root or flash my phone,
i am using Airtel gsm card mumbai circle.
attached file-details of phone
Is there any solution for above .Plse help asap
Click to expand...
Click to collapse
You will need to flash a radio/baseband that matches your cid. Mismatched radio baseband can cause all connectivity to fail. If you don't want to modify your phone, that's your only option. Sorry.

htcdesire816 said:
guys i am using htc desire 816 dual sim
yesterday i while changing network type from *#*#4636#*#*
i changed radio band ,i selected USA band .
from that moment device is not detecting any network,
after manually searching network screen remains blank.
i tried selecting other radio bands from the same list but no use
i dont want to root or flash my phone,
i am using Airtel gsm card mumbai circle.
attached file-details of phone
Is there any solution for above .Plse help asap
Click to expand...
Click to collapse
Flash cyanogenmod, do the baseband change again. Switch to automatic. Only cyanogenmod has the automatic network selection option. Stock rom don't have.
This is the only way as I also experienced the same.

problem solve without rooting and flashing
Guys thx for rply
.....i hard resetd phone.....put my sim in other cellphone & operatd for 1 day as i was not having time for doing R&D on htc
On second day before going to htc service centre i put sim in it ...changed radioband to USA and selectd GSM only network mode......surprisingly it detectd airtel network

htcdesire816 said:
Guys thx for rply
.....i hard resetd phone.....put my sim in other cellphone & operatd for 1 day as i was not having time for doing R&D on htc
On second day before going to htc service centre i put sim in it ...changed radioband to USA and selectd GSM only network mode......surprisingly it detectd airtel network
Click to expand...
Click to collapse
That's great... I got f****d up doing the same.

htcdesire816 said:
Guys thx for rply
.....i hard resetd phone.....put my sim in other cellphone & operatd for 1 day as i was not having time for doing R&D on htc
On second day before going to htc service centre i put sim in it ...changed radioband to USA and selectd GSM only network mode......surprisingly it detectd airtel network
Click to expand...
Click to collapse
Please help me same problem i m facing i need your help.. i changed slot 1 settings in *#*#*4636#*#* three months ago then network gone.. from that day i m using my sim in slot 2 and slot 1 is not detecting network. I tried changing settings those settings again also done hard reset but not working

HTC Desire 816 Dual SIM-India, Both SIM not working after flashing CM-12, flashed official L firmware but still not working, tried above fix but still problem is there. If any one got the solution then please let me inform.

same trouble please help
I am having the same problem, until now i can not use my htc desire 816 slot 1, no network /mmi code invalid, band select stuck USA Band, please anyone can help, what shoul i do
may be you can send radio band recovery for flashing, change to other dev rom (cynogen mod or else) or other else to do that can make my HTc slot 1 back to its baseband frequencies.
_________________________
Solved
_________________________
Cyonagen mod fix his problem, change band to automatic.

I am also facing same problem, pls help if your issue has revolved… Rafique 8080345680

anything which can help in the same matter?

Solution .
htcdesire816 said:
guys i am using htc desire 816 dual sim
yesterday i while changing network type from *#*#4636#*#*
i changed radio band ,i selected USA band .
from that moment device is not detecting any network,
after manually searching network screen remains blank.
i tried selecting other radio bands from the same list but no use
i dont want to root or flash my phone,
i am using Airtel gsm card mumbai circle.
attached file-details of phone
Is there any solution for above .Plse help asap
Click to expand...
Click to collapse
.
I have a oneplus two and went through the same problem . I read a lot of threads on various sites and found that this question remains unanswered. Very disappointing .I was tinkering just to find something to make my sim work . Fortunately ,I found the fix.Its very easy and a person like me who doesn't even know how to root a phone can solve this problem .
Solution.
Wipe data and cache.
Download the latest stock ROM available and flash it .
Type *#*#4636#*#*. Go in phone information.Open options . Select radio band 40. Just don't select USA.
Download Shortcut Manager lite.
Search engineering mode.(search 'eng')
Scroll down to find
com.android.engineeringmode.network.BandMode
And
com.android.engineeringmode.network.BandMode2.
Find 'Auto' option after opening one of the bandmodes.
The sim should start working.
If the sim doesn't start working , change band and reselect Auto . This should do.
PS. If u don't have any other radio band than USA then try these repairs on USA band . Hope it works. If this works please share this info on other sites and help people.
Cheers !

Anyone found any solution, I am facing same problem after changing radio band from phone test menu.
Please help

I fixed the problem in my oneplus2.. Its very easy
Download shortcut master(lite).Click on the menu and select search.
Search "Engineer"
Open and launch "com.android.engineeringmode.EngineeringMode"
Select " Network Set"
Select "band mode"
Select "Hardware Default(Foreign)"
Thats all...
You network will be back to normal in a second

Arun NK said:
I fixed the problem in my oneplus2.. Its very easy
Download shortcut master(lite).Click on the menu and select search.
Search "Engineer"
Open and launch "com.android.engineeringmode.EngineeringMode"
Select " Network Set"
Select "band mode"
Select "Hardware Default(Foreign)"
Thats all...
You network will be back to normal in a second
Click to expand...
Click to collapse
Doesn't work and fails. What do I do now ? My sim won't get detected. I already did a hard reset and still nothing.

Radio Band problem solved without flash or data loss
Hi frndz, sorry i am so late with solution but it workd on my htc 816 dual sim,
1st need to insert 2g/3g sim in ur sim slot 1
Sim slot2 remain empty,
Now restart htc 816, and go to radio band option by *#*#4636#*#* then phone info then radioband
And finally CELLULAR 800Mhz
Now direct restart mob
Its done, hope u r back
Thnks

Did anybody tried in "backup and reset", the button "network reset" ?

Am facing the same problem but with D816w, you see, my device is a Vietnam source (HTC_059) and after receiving the Android 6 update I lost my IMEI numbers due to Unkown Baseband, after some research I did find Android 5 Firmware which is compatible with my CID, I have restored my Baseband with IMEI along but with no Coverage, when i go to *#*#4636#*#* am only left with Automatic band , NO USA No Europ No African or even ASIA,
My device is rooted but with S-ON , anyone can help me with that?

H815 can't make / receive calls but sms / data works great?

It's a UK vodafone G4 which I got unlocked and was using my O2 sim without issues. I ported the O2 number to iD Mobile (three network) and can use SMS as well as mobile data but calling doesn't work at all.
I put a Three sim in and it's exactly the same issue. The iD sim works fine in other phones. Other sim cards work fine in the G4. It's just iD and Three sims that won't make or receive calls.
I since used LGUP to install a kdz file (V20c-234-15) in the hope anything vodafone will be removed but that didn't make any difference. In the phone Settings if I check Network Status it shows the iD connections, in Status it shows Unknown Phone Number, in Network Mode it displays 2G/3G/4G, APN shows all correct iD settings. If I search for Available Networks it displays all the usual UK networks and only lets me select iD network.
Customer service said wait a few more days after porting and suggested a faulty sim (yet works in other phones) but after both iD and Three sims showing the same issue I've not much hope in their suggestions.
I know others that bought the vodafone G4 and unlocked it for Three haven't had any issues. I only found 1 other post online that has the exact same issue as me but their post hasn't updated since last month.
I don't know what to try. Other sims work, just not iD/Three. Any ideas for me to try?

I've since tried another kdz file for lollipop as I know for sure the sim worked before the number was ported before the phone was upgraded to MM.
Still doesn't work for calls, only data and SMS.
Can anyone offer more suggestions to try?
Sent from my SM-T520 using Tapatalk

djnield said:
I've since tried another kdz file for lollipop as I know for sure the sim worked before the number was ported before the phone was upgraded to MM.
Still doesn't work for calls, only data and SMS.
Can anyone offer more suggestions to try?
Sent from my SM-T520 using Tapatalk
Click to expand...
Click to collapse
This is a weird problem maybe your problem is modem or wrong kdz file. Downlaod right file and flash again and be sure that you click refrush that is makes wipe in LGUP.(I use LGUP)

cashflow67 said:
This is a weird problem maybe your problem is modem or wrong kdz file. Downlaod right file and flash again and be sure that you click refrush that is makes wipe in LGUP.(I use LGUP)
Click to expand...
Click to collapse
Thanks,
I had this problem with stock rom too though. I only started trying more kdz files in the hope that might work. Issue started the moment my number ported from O2 to iD Mobile.
Wierdly the phone doesn't like Three network sims either now and those worked fine before the number port happened.
Am really confused
Sent from my SM-T520 using Tapatalk

I need help on samsung note 4 N910v

My friend brought an original refurbish Samsung N910v android version 5.01 which was working with GSM 2G if not 3G until when I tried to update to new version android v6.0.1. In the menu>setting>about when I checked first before anything it showed me N910 F v5.01 but in boot mode Odin it was N910v.The problem started when I just typed *#9090# the phone immediately started reboot loop. I have managed to unlock the boot loader and root the phone installed custom rom version 6.0.1 by Paul Pizz rom VRU2CPJ2.r-1 but still can not have 2G or 3G GSM network. Please help to revive the phone again whether it meant to go back to 5.0.1 that would work with gsm cause am full stack now.

Have you checked to ensure you have the APN information in place? I have a Galaxy Note 4 N910V now (just got it a few days ago) and when I put my T-Mobile SIM in it from the very first time I have to manually put in the APN data - on custom ROMs it's usually picked up and there automagically but not always so, my suggestion is that you check to make sure your APN information is currently there as it should be.
Settings - More - Cellular networks - Access Point Names - make sure the one you need to be using is selected and if it's not then you'll have to put that info in manually and save it.
As for the actual model number, take the battery out and see what the model number is on the sticker in the battery compartment area - if the sticker isn't there then it could be a device that someone has done some experimenting with because that info can be changed. The sticker should be there, of course, but sometimes people take 'em out when they're mucking around with stuff, who knows.

Initially the phone is from Verizon but was working on 2G ,3G GSM network with N910F firmware version 5.0.1.it was working on airtel network until when I wanted to update. May I have the Apn settings,please

gruka said:
Initially the phone is from Verizon but was working on 2G ,3G GSM network with N910F firmware version 5.0.1.it was working on airtel network until when I wanted to update. May I have the Apn settings,please
Click to expand...
Click to collapse
The APN will be your network. Are trying to use Verizon? If so, you should have a spot to tic the VZWINTERNET. If not, then you have a sim card issue.

ziggy the how do i sort out the sim card issue ,Since phone says this sim card is not from verizon

gruka said:
ziggy the how do i sort out the sim card issue ,Since phone says this sim card is not from verizon
Click to expand...
Click to collapse
Is the sim from verizon? If you have a good account go to a corporate store and have them give you a new one. It's free.
Also, what are your APN settings and I will compare to mine. Everything works on mine.

the fone I have came from china ,am in Africa and remember I told you it was working woth N910f firmware version 5.0.1.All am asking is there anyway I could make this fone work again on Gsm network, cause all it says after re flash is the card is not from verizon

I now rooted this n910v android version 5.1.1 still no network, am in Africa where there is 2G&3G GSM network, how would I make this fone to work again with the gsm network now that I rooted. On the network bar I get a circle with a cross ,how to make this work

gruka said:
I now rooted this n910v android version 5.1.1 still no network, am in Africa where there is 2G&3G GSM network, how would I make this fone to work again with the gsm network now that I rooted. On the network bar I get a circle with a cross ,how to make this work
Click to expand...
Click to collapse
https://www.androidfilehost.com/?fid=457095661767122226
- N910VVRU2CPJ2_FullFirmware_NoAboot<--- Full Framework with no aboot so you will not re-lock bootloader, but will unroot and restore back to 100% stock. once your on the full stock check if your connections are working fine, if they are then install custom rom, otherwise change the sim card

go in settings, connections and select network mode to global, should be fine

LG G3 D851 shows full bar signals but no service

Hey guys i'm having some problems with my lg g3 d851, since the screen of my beloved lg g2 died after 2 years and a half, my friend gave me his lg g3 to use it as a tablet since the phone doesnt recognize any signal at all, right now is running the stock rom for android marshmallow, everything works fine except for the signal that either always keeps in "no service", i already try to put another sim card on the phone and its showing the same problem, already checked the IMEI on the swappa blacklist and everything is okay, here are a few screenshots, any thoughts on how to solve this problem would be very appreciated thank you!

Have you modified the APN settings under mobile networks?

kfcherry said:
Have you modified the APN settings under mobile networks?
Click to expand...
Click to collapse
hi thanks for replying, yeah i already modified the APN settings under mobile networks with the APN of my carrier that is IUSACELL (AT&T México) and is still showing the same problem "no service" or "searching"

I had the same problem, try installing another modem, or send me an pm, I have the same mobile company (right now I'm having some problems with the at&t mexico)

I am having a similar problem with my d851 30g. It isvnot rooted and running stock android 6.0 tmobile rom. I am with movistar (mexico) it will have signal and be on the network and then eject the sim saying invalid then reset. Did factory reset. Movistar sim worked for about an hour and then same thing. Have a s from telcel switched and no problem till this Morning. Did the same thing and restarted. Recognized the sim and all fine. I am new to this and could use a little help. As it is connecting with the other sim and not my movistar sim. Possible software issue or corrupted sim?
Thanks in advance,
Alex miller

"phone not allowed for voice" error. Any help?

Hello everyone
I have an LG v30+ running stock android 9 with the global v31a rom.
Today I moved to a new carrier, and after installing new sim, the cellular internet works just fine, but voice calls and sms are not working.
I get the "phone not allowed for voice" message and on the taskbar shown on a "MM" icon.
At first I also received an error windows I attached here.
Moving the new sim to another newer xiaomi phone - everything works fine including calls and sms.
Customer service couldn't fix them from their said claiming it's an issue with phone configurations.
Any idea on how to fix this?
Thanks

I just tested another company's sim card and everything works fine.
So it must be some support from the new carrier
Any idea what can be done before I chose another carrier?

What is the model number (Settings -> General -> About phone -> Hardware info)?
Please share a screendump of your Network status screen (Settings -> General -> About phone -> Network). You can blank out the IP address.
Also, please share screendump of the Testing menu Phone information screen (dial *#*#4636#*#* -> Phone information). Scroll it up 3 lines lines so you don't share IMEI, Phone number, IMSI, but so that we can see all the Provisioned lines.
First thing I would try is a Network settings reset (Settings -> General -> Restart & reset -> Network settings reset) then restart the phone.
It is possible that your carrier only provides voice over VoLTE (and SMS over IMS, which is part of the same feature set). That only works if the phone knows the correct settings for your carrier. That would explain why it works with the newer Xiaomi phone. You can check if you have VoLTE settings in the menu (Settings -> Network menu -> Call). Even if the phone does NOT know your carrier, you may be able to configure it through the Hidden menu (depending on your model number). But it is VERY complicated, and you need detailed information from the carrier about the settings to enter.
Or it could be something else entirely.
On a different note, this thread definitely should have been in the Questions section, not in the Guides section.

KamaL said:
Hello everyone
I have an LG v30+ running stock android 9 with the global v31a rom.
Click to expand...
Click to collapse
Not sure why you are calling 31a "global". It's merely the European H930 31a Pie. I've seen a couple of other people use that term and not sure why... It's not "global" in any way than any other KDZ. (EDIT: I see your screenshot where it says global, which is very strange. Is that some setting? That's just weird.)
Unless you actually have an H930 phone, using the H930 KDZ will not give you the H930 bands or anything. You are still using the LTE/HSPA bands that are on your variant. Some people use H930 firmware on H930D/H930DS for different language options and vice versa. So, "global" is quite an exaggeration. Canada H933 has more LTE bands than any of the V30 variants, so it's really the "global" if any are. (But you can't convert to Canada H933 unless you have a compatible North American variant.)
What variant do you have and what country do you live in?

Ahh, so a European H930. Which country are you in, and who is the carrier?

KamaL said:
I just tested another company's sim card and everything works fine.
So it must be some support from the new carrier
Any idea what can be done before I chose another carrier?
Click to expand...
Click to collapse
I don't know where you live and what variant you actually have, but you are using EU H930 31a KDZ.
For instance, if you are in India and using Jio carrier, you need India H930DS KDZ as Jio is VoLTE only. But H930 31a doesn't have Jio's VoLTE settings... Using "another carrier" which allows legacy HSPA during phone calles would then be why it works on the other carrier but not Jio. To fix that you would need to flash India region H930DS firmware.
I am not saying you live in India or using Jio -- you didn't give us any information about that. I am just giving a real life example of why your phone would work on one carrier but not another.
Also, some carriers make you register your phone. If you just stick the same SIM card in you had from previous phone, it sees it's a different phone and will throw up an error message like that until you call them or go into store and tell them what "new" phone you are using. The "other carrier" may not be such a control freak.
---------- Post added at 10:37 AM ---------- Previous post was at 10:28 AM ----------
TheDannemand said:
Ahh, so a European H930. Which country are you in, and who is the carrier?
Click to expand...
Click to collapse
Since he says he has V30+, I know he doesn't have native H930 phone. There are no H930 V30+. The V30+ are H930G and H930DS and neither on them have firmware numbered "31a".
---------- Post added at 10:44 AM ---------- Previous post was at 10:37 AM ----------
KamaL said:
Hello everyone
I have an LG v30+ running stock android 9 with the global v31a rom.
Today I moved to a new carrier, and after installing new sim, the cellular internet works just fine, but voice calls and sms are not working.
I get the "phone not allowed for voice" message and on the taskbar shown on a "MM" icon.
At first I also received an error windows I attached here.
Moving the new sim to another newer xiaomi phone - everything works fine including calls and sms.
Customer service couldn't fix them from their said claiming it's an issue with phone configurations.
Any idea on how to fix this?
Thanks
Click to expand...
Click to collapse
I see posts from you back in November and you have been on 31a for awhile...
https://forum.xda-developers.com/showpost.php?p=81065243&postcount=852
So, any issues have to be with this new carrier as you have had phone calls on 31a for most of a year now.

Sorry, double post

Thanks everyone for the replies.
@TheDannemand
Some more information about my device:
Country: Israel
Carrier: We4G
Hardware version: LH-H930G.
Looking up using my IMEI number on lg-roms website gives this model: LG V30 Plus TD-LTE
I shared the network menu testing menu you mentioned.
I DO NOT see any VOLTE setting in the Call menu.
I already tried network settings reset.
@ChazzMatt
I have the H930G version. Actually I always follow your guides in that thread to upgrade the version, and I've been on this stock firmware for a year. So it must be something related to the carrier settings I think.
I actually didn't use my country's specific KDZ file as it was released a bit late. I used the european version if I remember well.
Should I flash the local one? According to lg-firmwares and lg-roms website it's this one:
Code:
https://lg-firmwares.com/downloads-file/21127/H930G30a_00_OPEN_IL_OP_0903
Will it have an impact on call services and bands?
Any chance it is really a carrier using VoLTE for calls? I tried asking all kind of questions but didn't get any smart answer from the tech support team.
Also, what do you mean by registering the phone? I never heard about this.
Thanks again!
View attachment 5082915View attachment 5082917View attachment 5082919

For some reason I cannot see your attachments. What I wanted to see was (1) whether you have an LTE connection and (2) whether the phone sees VoLTE as provisioned. In truth, I only need the Phone info screen (from the Testing menu) to see that.
I think it is quite plausible that your carrier requires VoLTE to make calls and that your ROM doesn't support it because it doesn't know your carrier. A ROM for your region probably DOES know your carrier (if they are well established). But it's also possible that it doesn't (if they're newer or changed their VoLTE parameters in recent years).
This was my first thought when I read your post and saw that you were on 4G (which should be LTE, although in USA carrier marketing departments have diluted the term to also cover old 3.5G). And I see that it is ChazzMatt's thought too, with the example from Jio India.
I googled We4G to get a clue if they're VoLTE only, but all the links were in Hebrew
Carriers who don't require VoLTE drop the connection to 3G in order to make calls. This works on every phone that supports LTE because it doesn't require knowledge about your carrier.
However VoLTE relies entirely on VoIP and requires an elaborate login to carrier servers, with security and handshaking to prevent illicit use of their network. And the parameters for that are carrier specific. Each phone has a so-called "buffet" of carrier configs known to that ROM. That's why it matters to use a ROM that knows your carrier.

Thanks for the detailed reply.
I think I'll try the local ROM I mentioned. I just want to be sure it doesn't make a clean wipe if I flash Kdz with LG UP. is that so?
I'm uploading the attachments once again.

Tapatalk is messing with attachments. Here's the last one

KamaL said:
Thanks for the detailed reply.
I think I'll try the local ROM I mentioned. I just want to be sure it doesn't make a clean wipe if I flash Kdz with LG UP. is that so?
I'm uploading the attachments once again. View attachment 5082947View attachment 5082949
Click to expand...
Click to collapse
Thank you. I see your attachments now.
So you do indeed have LTE connection for your mobile data. But the phone doesn't even pick up VoLTE provisioning -- which is the first and most basic step in supporting VoLTE.
I would definitely try the regional ROM, but you should flash with Refurbish or Partition DL -- which means losing data. Sorry.
In fact, since you're doing a Frankenstein, I would flash back to Nougat first using Partition DL (to update the partition table), perform a Master Reset (it may bootloop until you do), then flash up to Pie. Wait for @ChazzMatt to confirm those steps.
Good luck to you

TheDannemand said:
Thank you. I see your attachments now.
So you do indeed have LTE connection for your mobile data. But the phone doesn't even pick up voLTE provisioning.
I would definitely try the regional ROM, but you should flash with Refurbish or Partition DL -- which means losing data.
In fact, since you're doing a Frankenstein, I would flash back to Nougat first using Partition DL (to update the partition table), perform a Master Reset, then flash up to Pie. Wait for Chazz to confirm those steps.
Good luck to you
Click to expand...
Click to collapse
I really hope I can flash it without losing data. I prefer not to back up all data.
That's what I also did in the previous rom upgrades.
Would that be possible?

KamaL said:
I really hope I can flash it without losing data. I prefer not to back up all data.
That's what I also did in the previous rom upgrades.
Would that be possible?
Click to expand...
Click to collapse
I don't see any way to do this safely without losing data. Sorry.
You could skip that carrier and go with one that doesn't require VoLTE (i.e. one which supports the old dropping to 3G for calls). But you won't have the benefits of VoLTE and WiFi Calling. And you may be in the same situation later if that carrier decides to close down their 3G network and go VoLTE only.

KamaL said:
Tapatalk is messing with attachments. Here's the last oneView attachment 5082951
Click to expand...
Click to collapse
Try enabling 'VoLTE Provisioned' on that screen then restarting your phone.
Is there an 'Advanced Calling' menu in Settings?

Two things that might help:
1) Before taking the plunge, put the SIM in your Xiaomi phone and see if you can make a call WITHOUT using VoLTE: One way is if Settings menus allow disabling VoLTE. If no Settings menus, try the same Testing info - Phone info screen and see if VoLTE is provisioned there. I assume it is. But if VoLTE is ALSO not provisioned on the Xiaomi, that means the problem isn't lack of VoLTE on the V30.
2) Just backup the phone using LG Backup, either through Settings -> General menu -> Backup (then transfer file to PC or flash drive) or using LG Bridge. It backs up all app data and most phone settings (though not all). And I was able to use it across different ROM versions and even different ROMs (between H932 and US998).

jptV30 said:
Try enabling 'VoLTE Provisioned' on that screen then restarting your phone.
Is there an 'Advanced Calling' menu in Settings?
Click to expand...
Click to collapse
I can't turn it on unfortunately.
There's a call--> additional settings - - > other settings menu
But I get this error message when I try it, and then I lose LTE connection too.

jptV30 said:
Try enabling 'VoLTE Provisioned' on that screen then restarting your phone.
Click to expand...
Click to collapse
That one is info only, not a toggle -- even though it looks like it.
KamaL said:
There's a call--> additional settings - - > other settings menu
But I get this error message when I try it, and then I lose LTE connection too. View attachment 5082979
Click to expand...
Click to collapse
Yeah, as long as the phone doesn't see it as provisioned, we can forgot about menus and settings.

TheDannemand said:
Two things that might help:
1) Before taking the plunge, put the SIM in your Xiaomi phone and see if you can make a call WITHOUT using VoLTE: One way is if Settings menus allow disabling VoLTE. If no Settings menus, try the same Testing info - Phone info screen and see if VoLTE is provisioned there. I assume it is. But if VoLTE is ALSO not provisioned on the Xiaomi, that means the problem isn't lack of VoLTE on the V30.
2) Just backup the phone using LG Backup, either through Settings -> General menu -> Backup (then transfer file to PC or flash drive) or using LG Bridge. It backs up all app data and most phone settings (though not all). And I was able to use it across different ROM versions and even different ROMs (between H932 and US998).
Click to expand...
Click to collapse
I didn't find settings to turn off VoLTE.
Here are the settings on the xiaomi. It is NOT provisioned apparently.... View attachment 5082983

KamaL said:
I didn't find settings to turn off VoLTE.
Here are the settings on the xiaomi. It is NOT provisioned apparently....
Click to expand...
Click to collapse
The screenshot doesn't include the VoLTE line. But if VoLTE is ALSO not provisioned on the Xiaomi that means the problem if elsewhere, not lack of VoLTE on the V30. So hold off on that Frankenstein for a bit.
I have a client meeting coming up, probably won't have more time today. But this is good news, kind of