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LG G4 Sprint SIM / Network unlock

Has anyone been able to SIM / network unlock Sprint variant of LG G4? For international use? for domestic carriers?
The phone appears to be locked. I tried putting GSM micro SIM and putting phone in to GSM mode. Got an icon about invalid SIM in notification tray. But no prompt to unlock. Also no menu in settings to unlock via network like my note 3 had. Even worse, no menu to select GSM Network operator in the settings.

leond said:
Has anyone been able to SIM / network unlock Sprint variant of LG G4? For international use? for domestic carriers?
The phone appears to be locked. I tried putting GSM micro SIM and putting phone in to GSM mode. Got an icon about invalid SIM in notification tray. But no prompt to unlock. Also no menu in settings to unlock via network like my note 3 had. Even worse, no menu to select GSM Network operator in the settings.
Click to expand...
Click to collapse
if you are in US i think you can call sprint and they will unlock your phone for free.

elmy2424 said:
if you are in US i think you can call sprint and they will unlock your phone for free.
Click to expand...
Click to collapse
I know , that is the theory, I am curious if anybody actually tried it. I am concerned about the fact that I don't see a menu to select GSM network, which was there in Note 3
it almost looks like the phone can roam on GSM network using Sprint SIM, but all the menus that would allow presence of different SIM where removed.

leond said:
I know , that is the theory, I am curious if anybody actually tried it. I am concerned about the fact that I don't see a menu to select GSM network, which was there in Note 3
it almost looks like the phone can roam on GSM network using Sprint SIM, but all the menus that would allow presence of different SIM where removed.
Click to expand...
Click to collapse
that option is just hidden, when someone get the phone unlocked the option in the menu will be enabled, are you inside USA

I did try a Simple Mobile Sim and it worked just fine. Have you tried any of the movs from Att or Tmobile??
Sent from my SM-G900V using XDA Free mobile app

bump...anyone

Google~Android said:
bump...anyone
Click to expand...
Click to collapse
Friend called Sprint and they unlocked his phone OTA. Now when non-sprint SIM is inserted it no longer complains about invalid SIM, however it will not connect to any networks in USA and still no way to see a list of networks or do a manual selection of network. That menu is still missing. I suspect the phone will now work outside of the USA in automatic network selection mode only, which may not be a good thing some times.

leond said:
Friend called Sprint and they unlocked his phone OTA. Now when non-sprint SIM is inserted it no longer complains about invalid SIM, however it will not connect to any networks in USA and still no way to see a list of networks or do a manual selection of network. That menu is still missing. I suspect the phone will now work outside of the USA in automatic network selection mode only, which may not be a good thing some times.
Click to expand...
Click to collapse
Ive got a really smart friend working on it... Im positive he'll get it done.. Jt matter of patience now...

Google~Android said:
Ive got a really smart friend working on it... Im positive he'll get it done.. Jt matter of patience now...
Click to expand...
Click to collapse
Doesn't matter what you try, you cannot use Sprint's phone on AT&T T-mobile here or any US GSM carriers. When sprint unlocks it for you, then you can use it outside of US on GSM Networks.

chirayu said:
Doesn't matter what you try, you cannot use Sprint's phone on AT&T T-mobile here or any US GSM carriers. When sprint unlocks it for you, then you can use it outside of US on GSM Networks.
Click to expand...
Click to collapse
You must be new here. Domestic gsm has been unlocked on most modern Sprint smart phones. Just in the years I've been with Sprint ive unlocked the Moto Q, G2, S4, and now the G3 for ATT and straight talk. Ive read of several others having the same ability. The s5 can also be unlocked but only one guy knows how but you gotta pay him for it. Kinda ****ty but it actually works.
Sent from my LGLS991 using Tapatalk

just get shortcut master (lite)
click the 3 dots in the upper right, click secret code explorer, click system apps and there are a few ATT hidden menus in there.
now no clue if they do anything.

chirayu said:
Doesn't matter what you try, you cannot use Sprint's phone on AT&T T-mobile here or any US GSM carriers. When sprint unlocks it for you, then you can use it outside of US on GSM Networks.
Click to expand...
Click to collapse
You didnt listen... Sprint phone works 100% for att.. They jt blocks it at the software level... But my friends has unlocked all the newer sprint phones till now.. I dont see why he shudnt be able to do it here

Any chances of unlocking when outside US? I got my phone from Amazon and got it shipped in my country. Tried calling them but they said they only unlock activated phones. Also tried various sites that offer unlock codes but since G4 is not asking for unlock code, they can't do anything.
Do I have any other options?

For those still trying to unlock, I've followed this post for unlocking the G3.
http://forum.xda-developers.com/sprint-lg-g3/general/sim-unlocking-ls990-zv8-t3083567
And I can now accept calls, will try it out some other time if I can get data as well.
Note: Make sure you have the correct permissions on the files that you'll copy.

ijball said:
For those still trying to unlock, I've followed this post for unlocking the G3.
http://forum.xda-developers.com/sprint-lg-g3/general/sim-unlocking-ls990-zv8-t3083567
And I can now accept calls, will try it out some other time if I can get data as well.
Note: Make sure you have the correct permissions on the files that you'll copy.
Click to expand...
Click to collapse
will this work for at&t?? on just international?

Google~Android said:
will this work for at&t?? on just international?
Click to expand...
Click to collapse
I can't confirm, since I don't have access to any AT&T SIM at the moment. If you're already rooted, you can try it out, but make sure to back up the files.
Another update: After updating the APN, my data finally worked. LTE is impossible at the moment since the this doesn't support the LTE bands here in my country
Warning: Don't try to disable auto activation for now. I got the Security Error and still on the process of fixing it.

ijball said:
For those still trying to unlock, I've followed this post for unlocking the G3.
http://forum.xda-developers.com/sprint-lg-g3/general/sim-unlocking-ls990-zv8-t3083567
And I can now accept calls, will try it out some other time if I can get data as well.
Note: Make sure you have the correct permissions on the files that you'll copy.
Click to expand...
Click to collapse
In the us or internationally?

clockcycle said:
In the us or internationally?
Click to expand...
Click to collapse
Internationally.

!!!!! i got it working on at&t!!! calling and sms work..I dont have data so i can't test that...ending a call gives issues as it hangs there for a bit!!!

I have the Sprint LG G4
I also got the unlock code from Sprint. But I can't get the phone to ask for the unlock code. Any hints. Can I force it to ask?

Tips for Getting Functional Wifi Calling on AT&T.

Since there have been a few posts about people wanting to get their non-AT&T S9 working on AT&T with all the advanced features, I figured I'd post some tips since I have 2 S9s that have been successfully converted.
1. You must come from a U1 firmware to the AT&T U Firmware.
2. Make sure your Sim Card is fairly new. I have had sim cards work in an older phone but not a newer one.
3. Have AT&T hard set the IMEI of a AT&T branded phone(that supports wifi calling). Do this by putting your sim card into the AT&T branded phone and call AT&T customer service and say your Wifi calling and HD Voice are not working.
4. Make sure Wifi Calling was active on the AT&T branded phone before moving the sim card to the S9.

Also make sure you have ATT csc installed. There are a few required apks that are in the odm folder. I was able to get it working on a SM-G965F

I wonder what else could be tried?
I have done all of the above coming off a brand new unlocked U1, flashed the U FirmWare with ATT User data file. I can actually setup WiFi calling on the new handset (it doesn't really work ,however) and about 10 minutes later I get a provisioning failed message.

BigQuark said:
I wonder what else could be tried?
I have done all of the above coming off a brand new unlocked U1, flashed the U FirmWare with ATT User data file. I can actually setup WiFi calling on the new handset (it doesn't really work ,however) and about 10 minutes later I get a provisioning failed message.
Click to expand...
Click to collapse
The other phone you have with wifi calling provisions just fine on the same wifi network?

ajairola said:
The other phone you have with wifi calling provisions just fine on the same wifi network?
Click to expand...
Click to collapse
Funny you should ask this. Up until last night I could swap the SIM into the old phone and WIFi calling would provision and work. I tried this morning and the old phone is now giving me the same "ooops... we cannot provision..." message. I was thinking bad SIM card again? It's 10 days old though.
EDIT: Chatted ATT and verified they have the old IMEI set from the old phone that had working wifi calling.

BigQuark said:
Funny you should ask this. Up until last night I could swap the SIM into the old phone and WIFi calling would provision and work. I tried this morning and the old phone is now giving me the same "ooops... we cannot provision..." message. I was thinking bad SIM card again? It's 10 days old though.
EDIT: Chatted ATT and verified they have the old IMEI set from the old phone that had working wifi calling.
Click to expand...
Click to collapse
I've had provisioning fail on certain wifi networks, do you have somewhere with stable wifi where you could try again?

ajairola said:
I've had provisioning fail on certain wifi networks, do you have somewhere with stable wifi where you could try again?
Click to expand...
Click to collapse
I will be at work tomorrow which is located near the ATT store also and at work I have access to a fiber fed service with WiFi for "Non Work" use that is great and I will try that. I have Gigabit CATV internet at home wired thru a Ubiquiti Router and POE Switch and using a MU-MIMO (UAP HD Nano) access point which gives me a 433mbps wifi link to my S9. At home, I also have a 1st GEN At&t Micro-cell which I have left unplugged in case that could be an issue.
If WIfi calling doesn't activate on the work wi-fi then I will grab another SIM card at the at&t store and try again.

BigQuark said:
I will be at work tomorrow which is located near the ATT store also and at work I have access to a fiber fed service with WiFi for "Non Work" use that is great and I will try that. I have Gigabit CATV internet at home wired thru a Ubiquiti Router and POE Switch and using a MU-MIMO (UAP HD Nano) access point which gives me a 433mbps wifi link to my S9. At home, I also have a 1st GEN At&t Micro-cell which I have left unplugged in case that could be an issue.
If WIfi calling doesn't activate on the work wi-fi then I will grab another SIM card at the at&t store and try again.
Click to expand...
Click to collapse
Sounds like a plan. I wish I knew why wifi calling is such a pain, I could never get it to provision on my old AT&T uverse internet. I ended up provisioning my Dad's Galaxy S9 wifi calling via the hotspot my S9. If anyone you know would be able to hotspot their At&t phone that might let you provision wifi calling.

1. ATT must have a Samsung Branded ATT Phone's IMEI in the system, so that the features are allowed on your phone.
2. If you have U1, you need to use the U CSC, the U1 CSC breaks wifi calling and all other features that AT&T gives you.
3. If you are able to get root, and can see the system apps,
Under App Folder you need to have
UnifiedWFC
Vsimservice
Under Priv-App You Need to have
NSDSWebApp
WfcServiceV2
3. When you are trying to enable Wifi Calling Service, what happens when you click the wifi calling quick toggle.

Psyscope said:
1. ATT must have a Samsung Branded ATT Phone's IMEI in the system, so that the features are allowed on your phone.
2. If you have U1, you need to use the U CSC, the U1 CSC breaks wifi calling and all other features that AT&T gives you.
3. If you are able to get root, and can see the system apps,
Under App Folder you need to have
UnifiedWFC
Vsimservice
Under Priv-App You Need to have
NSDSWebApp
WfcServiceV2
3. When you are trying to enable Wifi Calling Service, what happens when you click the wifi calling quick toggle.
Click to expand...
Click to collapse
Could not provision on my work wifi or my AT&T iPad hot spot wifi.
I went to the AT&T store and got another new SIM card. I then chatted 5 or 6 AT&T Cust Svc. agents and got one that re-provisioned the IMS features and set my IMEI from the S7. They now work on my ATT branded S7, but not on the unlocked S9.
Within 3 second of toggling the WIFI calling feature I get the "ooooops we cant turn on wifi calling, please have an authorized person call.........."
I flashed the HOME CSC when coming from U1 to U. Can I just flash the U CSC as is, or would it be better to flash back to u1 and then back to U with the proper CSC.?
It would appear I had several obstacles to getting this enabled.

BigQuark said:
Could not provision on my work wifi or my AT&T iPad hot spot wifi.
I went to the AT&T store and got another new SIM card. I then chatted 5 or 6 AT&T Cust Svc. agents and got one that re-provisioned the IMS features and set my IMEI from the S7. They now work on my ATT branded S7, but not on the unlocked S9.
Within 3 second of toggling the WIFI calling feature I get the "ooooops we cant turn on wifi calling, please have an authorized person call.........."
I flashed the HOME CSC when coming from U1 to U. Can I just flash the U CSC as is, or would it be better to flash back to u1 and then back to U with the proper CSC.?
It would appear I had several obstacles to getting this enabled.
Click to expand...
Click to collapse
LOL Failed again!!!
Flashed U firmware and ATT User Data file. Nothing works. Same message.
What is "...Also make sure you have ATT csc installed......?" I have not been able to find any FW that is AT&T for the U. Every other carrier, yes. but no AT&T.
SO I have flashed back and forth a few times this evening. I did not locate a specific "ATT" CSC file. I did find the ATT USerData file that places the WiFi calling option in the menu like always. So it looks like you can use IMS features on ATT as long as you have the ATT U Version or a Carrier U version variant.
However, If you have the U1 version then it is not possible to use these IMS features on ATT.

I think you can just flash straight to U make sure your sim card is in the phone. If it doesn't work, try factory reset and then flash U CSC
I forget are you able to root to see what system files you have?
You could probably update the phone to the newest U1 buold, but switch out the csc with the U.
---------- Post added at 08:15 PM ---------- Previous post was at 08:13 PM ----------
BigQuark said:
LOL Failed again!!!
Flashed U firmware and ATT User Data file. Nothing works. Same message.
What is "...Also make sure you have ATT csc installed......?" I have not been able to find any FW that is AT&T for the U. Every other carrier, yes. but no AT&T.
SO I have flashed back and forth a few times this evening. I did not locate a specific "ATT" CSC file. I did find the ATT USerData file that places the WiFi calling option in the menu like always. So it looks like you can use IMS features on ATT as long as you have the ATT U Version or a Carrier U version variant.
However, If you have the U1 version then it is not possible to use these IMS features on ATT.
Click to expand...
Click to collapse
All U CSC's include att CSC.

Not rooted yet. Looking forward to it. I'm on U FW now. I couldn't get the IMS features working but I strongly suspect its AT&T. If AT&T
Disabled and enables my IMS on their end then my S7 wifi
Calling works. So into my S9 the SIM goes, it allows me
To check my 911 address and begins to provision but usually
Fails within 10 minutes.
Then, from there on I get the standard "Oops we cant provision" error message on subsequent attempts. Which requires lengthy calls to ATT to disable & enable IMS again. This makes me believe that my S9 IMEI is getting checked and flagged, then IMS is disabled.
Out of the blue I got a forced ATT OTA update today that updated my FW to ARBI, now I see another pending software update waiting. For the new boot loader I assume.
I did try my MINT Mobile SIM and even on the ATT FW I got the IMS features to work, and toggle in the "secret" device info.
I thought I'd give it a go w/o rooting.

My auto-update OFF was overridden and I got pushed the G960USQS2ARF4 to my handset last night.......

US OR US1? Well you can flash the arf4 U CSC right?
So they have you with an ATT S7 ? PM me or telegram me at @Psyscope I'll give you an imei for s8 that will make sure you should have wifi calling provisioned for your account.

These three apps are needed do you have them when you go to Apps?

BigQuark said:
My auto-update OFF was overridden and I got pushed the G960USQS2ARF4 to my handset last night.......
Click to expand...
Click to collapse
Sounds like you are running the latest AT&T firmware. If you put your sim into the S7 and call AT&T Customer service and report that Wifi calling isn't working(make sure they hard set the IMEI of the S7 to your account), then re-activate wifi calling on your S7 and then move your sim card into the S9, and try to activate wifi calling.

Psyscope said:
1. ATT must have a Samsung Branded ATT Phone's IMEI in the system, so that the features are allowed on your phone.
2. If you have U1, you need to use the U CSC, the U1 CSC breaks wifi calling and all other features that AT&T gives you.
3. If you are able to get root, and can see the system apps,
Under App Folder you need to have
UnifiedWFC
Vsimservice
Under Priv-App You Need to have
NSDSWebApp
WfcServiceV2
3. When you are trying to enable Wifi Calling Service, what happens when you click the wifi calling quick toggle.
Click to expand...
Click to collapse
Could one of you kind folks upload the above mentioned files from an S9 device for me .......... I am experimenting with an S9 port on my S7 Edge and can get WiFi Calling to provision but it still doesn't seem to work on the Phone app itself.
I get all of the activation responses and can even modify my Emergency Location dialog etc. , but no work with WiFi only or poor cellular area.
My CSC Flash and device doesn't have WFCServiceV2 ( just WFCService) and I don't have UnifiedWFC in the app folder
I can get WiFi Calling on Nougat and finally today on Oreo --- but I'd really like to run the Sac23 Port --- it seems the smoothest
Thank you !!!!!
---------- Post added at 07:39 PM ---------- Previous post was at 07:30 PM ----------
ajairola said:
Sounds like you are running the latest AT&T firmware. If you put your sim into the S7 and call AT&T Customer service and report that Wifi calling isn't working(make sure they hard set the IMEI of the S7 to your account), then re-activate wifi calling on your S7 and then move your sim card into the S9, and try to activate wifi calling.
Click to expand...
Click to collapse
Question --- This is kinda what I've done in the past to get calling features on ATT but I do it by going to my AT&T Business portal (I'm a business customer) and changing the IMEI there. That has worked for me in the past by using an IMEI from a branded store model phone - lol
But I have had some issues ---- when the IMEI that I put in the billing portal doesn't match my actual phone that I'm using then When I go to Phone > Settings > More Settings > Call Forwarding I often get errors or can't set the provisional forwarding numbers (I used Youmail for Voicemail in the past and currently I have been (when Busy, Unreachable , or Unanswered) forwarding to my Google Voice phone number that now has a Google Voice over WiFi Beta program. The other issue is that setting the IMEI to another number messes up Call Forwarding with things like Samsung Gear (AT&T numberSync) ???
What exactly did you get the AT&T Customer Support to do when you called ? maybe its different than what I'm doing in my Business Portal

A different imei has no effect on forwarding, that's related to your sim card. The IMEi if it is an AT&T branded one you call them and tell then to update it to one that's linked to an att branded Samsung phone that is wifi calling capable.
In regards to the s7 edge you would need to extract the csc files from an odin. Then find a custom rom and move the files around. Are you using the an unlocked S7 edge u or F? Because ttkg has a CSC selector.
---------- Post added at 12:50 AM ---------- Previous post was at 12:46 AM ----------
jcrompton said:
Could one of you kind folks upload the above mentioned files from an S9 device for me .......... I am experimenting with an S9 port on my S7 Edge and can get WiFi Calling to provision but it still doesn't seem to work on the Phone app itself.
I get all of the activation responses and can even modify my Emergency Location dialog etc. , but no work with WiFi only or poor cellular area.
My CSC Flash and device doesn't have WFCServiceV2 ( just WFCService) and I don't have UnifiedWFC in the app folder
I can get WiFi Calling on Nougat and finally today on Oreo --- but I'd really like to run the Sac23 Port --- it seems the smoothest
Thank you !!!!!
---------- Post added at 07:39 PM ---------- Previous post was at 07:30 PM ----------
Question --- This is kinda what I've done in the past to get calling features on ATT but I do it by going to my AT&T Business portal (I'm a business customer) and changing the IMEI there. That has worked for me in the past by using an IMEI from a branded store model phone - lol
But I have had some issues ---- when the IMEI that I put in the billing portal doesn't match my actual phone that I'm using then When I go to Phone > Settings > More Settings > Call Forwarding I often get errors or can't set the provisional forwarding numbers (I used Youmail for Voicemail in the past and currently I have been (when Busy, Unreachable , or Unanswered) forwarding to my Google Voice phone number that now has a Google Voice over WiFi Beta program. The other issue is that setting the IMEI to another number messes up Call Forwarding with things like Samsung Gear (AT&T numberSync) ???
What exactly did you get the AT&T Customer Support to do when you called ? maybe its different than what I'm doing in my Business Portal
Click to expand...
Click to collapse
You know call forwarding rarely works that way. There is the feature
Where you manually setup forwarding.
Dial **21*, followed by the 10-digit number you wish to forward the calls to, then dial #. For example, **21*1235556789# forwards your call to 123.555.6789.

Psyscope said:
A different imei has no effect on forwarding, that's related to your sim card. The IMEi if it is an AT&T branded one you call them and tell then to update it to one that's linked to an att branded Samsung phone that is wifi calling capable.
In regards to the s7 edge you would need to extract the csc files from an odin. Then find a custom rom and move the files around. Are you using the an unlocked S7 edge u or F? Because ttkg has a CSC selector.
---------- Post added at 12:50 AM ---------- Previous post was at 12:46 AM ----------
You know call forwarding rarely works that way. There is the feature
Where you manually setup forwarding.
Dial **21*, followed by the 10-digit number you wish to forward the calls to, then dial #. For example, **21*1235556789# forwards your call to 123.555.6789.
Click to expand...
Click to collapse
Any chance you could help me with those two files I'm missing --- assuming you are rooted ?
"My CSC Flash zip and device doesn't have WFCServiceV2 ( just WFCService) and I don't have UnifiedWFC in the app folder"
Thanks

For those who use Verizon MVNO's VoLTE Now works after Update!

I have a Verizon S9 with flashed T-Mobile firmware from back when I had it on Metro, which has the Verizon bloat from inserting a Verizon sim, anyway I use RedPocket CDMA Verizon on this phone now, and apparenlty VoLTE was broken last year after an update and there was work arounds like enabling emergancy mode and swaping the sim and it would stay until reboot.
Well Glad to say the new July update, it now has VoLTE!! There is now an option under Mobile Networks for VoLTE. And it works!
One strange thing though now instead of it showing Verizon, as the network it shows "Roaming Indicator off" which its not roaming. But just glad to VoLTE now works!
Another note: This T-Mobile update doesnt show avalible yet online? but yet it updated.

I wonder if there a way I can get where you are. I have a tmoble s8+ and put a verizon sim in to switch it to verizon and then switched that for my red pocket sim and VOLTE option shows in the menu but when I go to the *#*#4636#*#* menu also available through forceLTE app I see VOLTE but its grayed out. Also just as weird is that wifi calling is switched on and I cant turn it off. DO you have wifi calling on and which firmware are you on? I am on security patch level april 1st 2019.. Maybe I need to get your update and that will do it, but I show no update available.

madhits45 said:
I wonder if there a way I can get where you are. I have a tmoble s8+ and put a verizon sim in to switch it to verizon and then switched that for my red pocket sim and VOLTE option shows in the menu but when I go to the *#*#4636#*#* menu also available through forceLTE app I see VOLTE but its grayed out. Also just as weird is that wifi calling is switched on and I cant turn it off. DO you have wifi calling on and which firmware are you on? I am on security patch level april 1st 2019.. Maybe I need to get your update and that will do it, but I show no update available.
Click to expand...
Click to collapse
You might have to manually flash the update. But the April patch doesn’t have it for the S9 anyway.
I don’t think redpocket does WiFi calling volte setting is under mobile networks
Sent from my iPhone using Tapatalk

Is your software ver PPR1.180610.011.g955USQU5DSD3?
Yeah red pocket does not support wifi calling or video calling that is why I cant figure out why that is turned on on my phone. I just want VOLTE to work. I have it in the network settings menu just not on the field test mode 4636 menu and when I make a call no VOLTE.
I might just start from scratch with oden and download the latest verizon image. My CSC says VZN/VZN/TMB. Is that what yours says? granted I know your on an s9 but the s8 and s9 and even the 10 are really similar with there software packages.

madhits45 said:
Is your software ver PPR1.180610.011.g955USQU5DSD3?
Click to expand...
Click to collapse
I had an S9 not an S8. But in another forum others confirmed after the latest update there S8 did indeed work with volte as well
Sent from my iPhone using Tapatalk

hyelton said:
I had an S9 not an S8. But in another forum others confirmed after the latest update there S8 did indeed work with volte as well
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
YeAH i Know the guys on telegram say most of the stuff works the same between the 3 phones with only minor differences..
This has to be what your talking about.. https://9to5google.com/2019/07/25/g...ng-out-w-july-security-patch-qr-code-scanner/
Here is the reason I believe Im not seeing the update.. https://thedroidguy.com/2019/06/wha...-plus-wont-install-downloaded-updates-1081849

Son of a... awesome.. Ok so I re-enabled auto pre-config.. See here: https://forum.xda-developers.com/ve...0v-success-t3558214/post79937998#post79937998
THen I put in a tomble sim and got the update for july. Im downloading it now. I thought that disabling auto pre-config would be a good idea but I relaized the verizon is so anal that they would not allow me to get the update because my phone is really a tmoble branded. Anyway tmoble will give me the update then I can auto preconfig back to verizon and be using VOLTE... THANK YOU for your topic.. finally got it..
---------- Post added at 10:23 PM ---------- Previous post was at 09:56 PM ----------
Unfortunately I'm not getting as lucky as you are. I cant get on VOLTE, I cant even get on CDMA now with my red pocket sim. Ill keep working on it and see if anything else needs to be done, maybe a reset. I got cdma and i think ill have to disable auto pre config.

I wanted to post another update to those who are using an MVNO verizon or possibly other carriers, for s8-s10. I was finally able to get VOLTE to work but you must flash the matching carrier firmware, auto pre config will not work when using an MVNO. I Flashed the verizon firmware for my tmobile S8 and got the verizon modem file which I think made the difference. My CSC changes to vzn/xaa/tmb. Use odin and flash the CSC or CSC home and everything else in the other fields minus userdata. CSC will erase userdata, csc home will not.

madhits45 said:
I wanted to post another update to those who are using an MVNO verizon or possibly other carriers, for s8-s10. I was finally able to get VOLTE to work but you must flash the matching carrier firmware, auto pre config will not work when using an MVNO. I Flashed the verizon firmware for my tmobile S8 and got the verizon modem file which I think made the difference. My CSC changes to vzn/xaa/tmb. Use odin and flash the CSC or CSC home and everything else in the other fields minus userdata. CSC will erase userdata, csc home will not.
Click to expand...
Click to collapse
Glad you got it! On my s9 as long as auto config switched it was fine. Even worked on T-Mobile firmware for volte before the auto config
Sent from my iPhone using Tapatalk

at&t mobile network options

Anyone have the lg v40 running on at&t? surprisingly i have no options under mobile networking. I can only enable international data roaming and setup new apn. Usually i'd expect to see settings allowing me to change the bands.

Alibaba0101 said:
Anyone have the lg v40 running on at&t? surprisingly i have no options under mobile networking. I can only enable international data roaming and setup new apn. Usually i'd expect to see settings allowing me to change the bands.
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Everything is auto- , the phone I have is locked to att and I guess the only way to change that is to unlock the phone.

mtyler7807 said:
Everything is auto- , the phone I have is locked to att and I guess the only way to change that is to unlock the phone.
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thx, i flashed the unlocked firmware and still the same thing. looks like it keys everything off of the sim.

Alibaba0101 said:
thx, i flashed the unlocked firmware and still the same thing. looks like it keys everything off of the sim.
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It bounces off 2 things, the phone's props and the network being detected. Using the unlocked does not enable settings if it's not natively supported by the carrier contrary to popular belief. That was true on older versions of android. Newer ones relies on multiple configs to decide what options you get to see or not. In most cases, if the phone model is not what is expected for a particular network, it will default to global roaming mode that has the least set of options. From what I've seen, this comes as a result of carriers requesting to have specifically designated models tailored to their service.
If you are rooted, you can tweak stuff in build.prop to have the phone switch carrier and regional modes.

Alibaba0101 said:
Anyone have the lg v40 running on at&t? surprisingly i have no options under mobile networking. I can only enable international data roaming and setup new apn. Usually i'd expect to see settings allowing me to change the bands.
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root not needed:
1. for network mode, try dial *#*#4636#*#* and then phone information, this works on my v35 with tmo and att sim, you can also use a 3rd app called "network mode" which is a shortcut of the above, hope that works on v40 too.
2. for band selection, I use 277634#*# on v30(tmo unlocked) for both tmo and att sim; I use 277634#*# on v35 (both att unlock and usa unlock) for tmo sim; I use *#546368#*350# (need to dig into the menu to find band selection) on v35 (both att unlock and usa unlock) for att sim; hope either one of these two works for v40.

VoLTE and Wifi Calling support

Would like to know if these features are supported for the major US carriers. That's the only thing holding me back from pre-ordering.

gordec said:
Would like to know if these features are supported for the major US carriers. That's the only thing holding me back from pre-ordering.
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I know U.S. T-Mobile supported the XZ3 for VoLTE, which was the FIRST Sony unlocked phone it did that for. Your best bet to find out is prob to go check out other like 2019 or 2020 unlocked phones that people have VERIFIED to offer both on AT&T as well. But if that's an issue, then you may wanna consider T-Mobile then. I noticed on the XZ3 that in Call Settings there no longer was the option to turn VoLTE on or off, but during calls it REMAINED in 4G LTE (vs. just 4G), thereby proving VoLTE was in fact enabled.

The US Xperia 1 supported voLTE on T-Mobile, but not WiFi calling. So I'm assuming the mark II would at least do voLTE on T-Mobile. Not sure about the other carriers, but I feel like it would have to since carriers like Verizon are starting to not allowing non voLTE devices to be activated. And the mark II is supposed to work on Verizon.

Easy way to get WiFi calling in the US
https://forum.xda-developers.com/xperia-1/how-to/easy-to-wifi-calling-t4100229

Scorpiusest said:
https://forum.xda-developers.com/xperia-1/how-to/easy-to-wifi-calling-t4100229
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How is this a solution? Switching carriers lol

I want to preorder, but really need WiFi calling. Going to wait until regular users start to receive theirs. Right now with Xfinity Mobile we are paying about $30 per month for 5 lines. The service is as good as when we were Verizon postpaid. Not willing to switch just for this phone.

Anyone in the UK on O2 get it?

Rodders_28 said:
Anyone in the UK on O2 get it?
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Yup, got both (see attached)

I have none of those settings there.
I also don't get 4g+ don't know if that's related?
I get 4g+ if I put the missus Vodafone sim in.

Rodders_28 said:
I have none of those settings there.
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I should have mentioned also that I'm actually on the "Customized UK" firmware opposed to the "O2 UK Pay Monthly firmware" but I had WiFi calling for sure prior to this

So my Xperia 1 ii arrived today, I'm finishing-up set-up. This is the US model, which I'm using with ATT. The deep dive *#*#7378423#*#* on the software info page states: "Current modem config: VoLTE-ATT "
But have yet to find any configuration for VoLTE or Wi-Fi calling. I'll try a call with one of the other lines in my family, who have ATT branded newish phones, to see if it "sounds" like an HD Voice call (there's not notification bar indicator of HD call, right?).
Update: Tried the other *#*#4636#*#* and the options under Phone Info are all grayed out (sigh)

JamesMiami said:
So my Xperia 1 ii arrived today, I'm finishing-up set-up. This is the US model, which I'm using with ATT. The deep dive *#*#7378423#*#* on the software info page states: "Current modem config: VoLTE-ATT "
But have yet to find any configuration for VoLTE or Wi-Fi calling. I'll try a call with one of the other lines in my family, who have ATT branded newish phones, to see if it "sounds" like an HD Voice call (there's not notification bar indicator of HD call, right?).
Update: Tried the other *#*#4636#*#* and the options under Phone Info are all grayed out (sigh)
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You have to call ATT to whitelist your new IMEI for VoLTE provisioning. Then you need to make sure a new sim that supports VoLTE. This is what they told me but I'm missing the new sim, going to get one tomorrow

Thank you.,I'll give that a try. My SIM is the supposedly latest, about 2 years old, i. e. "A compatible SIM or eSIM card will display 25, 26, 27, or 28 in the ninth and tenth digits spots." Is there a newer SIM for ATT?

So had the following chat with ATT tech support:
"... Calista : To confirm, was the device purchased through AT&T?
Me : No, this is an unlocked phone, US model of Sony Xperia 1 ii
Calista : Thanks for the confirmation.
Calista : I have successfully activated VoLTE on the new device.
Calista : I have also checked and see that Wi-FIi calling can only be provisioned only on the device that are purchased through AT&T. However, AT&T will soon activate WiFi calling on the device that are not purchased through AT&T as well. You will be notified about this. "
However after power-cycling my phone and reprovisioning via Testing/Phone Information and on that page the steps of Refresh to get the SMSC number then tap Trigger Carrier Provisioning"--nothing, not VoLTE live switch. Remains gray. Still, interesting comment by tech support about upcoming Wi-Fi calling on BYOE.

Anyone know about VoLTE on Verizon yet? Just ordered my phone today and hoping that it will work.

JamesMiami said:
So had the following chat with ATT tech support:
"... Calista : To confirm, was the device purchased through AT&T?
Me : No, this is an unlocked phone, US model of Sony Xperia 1 ii
Calista : Thanks for the confirmation.
Calista : I have successfully activated VoLTE on the new device.
Calista : I have also checked and see that Wi-FIi calling can only be provisioned only on the device that are purchased through AT&T. However, AT&T will soon activate WiFi calling on the device that are not purchased through AT&T as well. You will be notified about this. "
However after power-cycling my phone and reprovisioning via Testing/Phone Information and on that page the steps of Refresh to get the SMSC number then tap Trigger Carrier Provisioning"--nothing, not VoLTE live switch. Remains gray. Still, interesting comment by tech support about upcoming Wi-Fi calling on BYOE.
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Those tech support chats are useless! Took me 4 calls/chat to get to one knowledgeable one who said they have to file a level 3 tech support ticket and as she was doing it she said our internal memo said this cannot be done for non-AT&T branded phones so I'm sorry

Why not just use Google Voice for wifi calling? I use Google Voice for just about everything now as it's a nice alternative to giving up my number to random businesses.

Is it possible, to install the VoLTE/VoWifi carrier settings by an app (as .apk)?
My problem is that Sony didn't include these settings for Swiss carriers. So I am thinking about, how to add these settings without breaking the firmware.

YandereSan said:
Why not just use Google Voice for wifi calling? I use Google Voice for just about everything now as it's a nice alternative to giving up my number to random businesses.
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VoLTE is required to continue to use AT&T after they sunset 3G and 4G (without VoLTE). Speaking of Google, they've confirmed to me that this phone (US version) works fine on their Google Fi, supporting VoLTE, which is interesting in that Google Fi is an MVNO via Sprint, T-Mobile, and U.S. Cellular.

So if I give ATT an IMEI for a Nokia Lumia 830 or Microsoft Lumia 640XL (both on AT&T's "good" list) to associate with my SIM in my Xperia, will my Xperia be provisioned by AT&T with VoLTE & Wi-Fi calling?