Develop Bugs

Unlocked S9 cannot register on Verizon MVNO?

I've got my unlocked S9 from Samsung. I have a Redpocket CDMA sim card, which works fine in a Samsung S7E and a Google Pixel. However, when putting this sim card in S9, the S9 could not get on its network. It shows Emergency calls only and "Not registered on network" when making a call.
Sometimes it shows "refreshing sim card data" and no network. When turning to network modes, it says "LTE/3G/2G" etc but redpocket cs seems to believe the right one should be "LTE/CDMA" instead, which is not in the list.
I tried various usual ways such as factory reset etc, which did not change anything.
I tried a project Fi and a verizon sim card in the S9 and they were recognized with no problem. Thus I think the S9 is not defective.
I did some searches and people mentioned S8 had the same issue too: https://forum.xda-developers.com/galaxy-s8/help/unlocked-s8-failed-to-register-red-t3736850
I am wondering whether anyone has this problem or a solution.
Will flashing to verizon firmware help?
Thanks.

I'm having the same issue with PagePlus! I just put the SIM from my VZW S6 into my unlocked S9 and when that didn't work I chatted with support to do an ESN change (I thought perhaps PP needed to do something on their end). I was told if there was no "LTE/CDMA" option that the phone wouldn't work on PP.
I tried using an app to switch between different network modes (including the LTE/CDMA/UMTS auto which my S6 uses) to no avail.
I'm tempted to try flashing the VZW firmware, but the post here makes me wonder if it will accomplish anything.

I tried that APP to force network mode too but it did not seem to work.
As an update, Redpocket customer service is really great that they moved my number from Verizon network to their GSM/ATT network, and everything works fine now. I do not want to try flashing verizon firmware for the same reason...
Too bad Samsung could not get such a simple thing right.
janame said:
I'm having the same issue with PagePlus! I just put the SIM from my VZW S6 into my unlocked S9 and when that didn't work I chatted with support to do an ESN change (I thought perhaps PP needed to do something on their end). I was told if there was no "LTE/CDMA" option that the phone wouldn't work on PP.
I tried using an app to switch between different network modes (including the LTE/CDMA/UMTS auto which my S6 uses) to no avail.
I'm tempted to try flashing the VZW firmware, but the post here makes me wonder if it will accomplish anything.
Click to expand...
Click to collapse

Can we sue them?
I faced the same issue too. Apparently, Samsung does a setting update that prevents the sim from registering for Verizon's MVNOs. I called them and they said they NEVER heard of this issue. Apparently, you all did too. I am tempted to sue Samsung for this since this could be an antitrust issue. They are preventing competition by working with Verizon and feigning ignorance.Can any of you comment on this?

I was going to go with one of Verizon's mvnos. And their SIM card would not work and I did not realize it until I spend the $40. I had to put an actual Verizon sim in my unlocked phone to use the Verizon network. So either Verizon is blocking the S9 on mvns or the mvnos don't have the updated information for the S9. Total wireless told.me it Had to be a Verizon branded phone for it to work. So I think if someone flashed the Verizon firmware on the unlocked version it probably would work.

i dont see anywhere on the post where you contacted the MVNO provider, to register the ESN or IMEI of the device.
Also does this MVNO even allow BYOD?
i remember I had a line from Cricket or Metro that had a sim card, it worked on my Nexus 5x, however inserting it to another nexus 5x, it didnt work, I had to call them to register my IMEI

Hey guys this is an old thread, but maybe this will help someone. My old Red Pocket SIM would not work on the S9, but my renewal came with a new SIM, ending in 8222-15XX (old was 8180-50XX) For ****s and giggles I put it in and it showed LTE/CDMA and verizon. Had RP CS switch my active SIM and now it works with no workaround!
TL;DR Try a new RP SIM if you are using one a year old or older.

I also have similar issue.
Where I used to get lte over voice, but no longer getting after a recent update from samsung. Using Redpocket cdma sim
Now I have lte and voice, but dont get lte over voice even though redpocket said they have enabled Volte on my line

We just added an Unlocked Galaxy S9 (replaced S5) purchased from Amazon (Black Friday sale), ordered new Sim from Pageplus (MVNO using Verizon ), called them to transfer the phone number, popped it in and the S9 configured itself for Pageplus, and everything works perfectly...

ToyTank said:
Hey guys this is an old thread, but maybe this will help someone. My old Red Pocket SIM would not work on the S9, but my renewal came with a new SIM, ending in 8222-15XX (old was 8180-50XX) For ****s and giggles I put it in and it showed LTE/CDMA and verizon. Had RP CS switch my active SIM and now it works with no workaround!
TL;DR Try a new RP SIM if you are using one a year old or older.
Click to expand...
Click to collapse
That's great news. I switched to GSMA due to CDMA issue. I will switch back to CDMA after my current plan expires.
I heard that RCS (messaging via wifi connection similar to imessage - samsung messages app supports it in pie I believe, not sure about oreo) is active in verizon now including mvnos. Have you tried it?

sam298 said:
That's great news. I switched to GSMA due to CDMA issue. I will switch back to CDMA after my current plan expires.
I heard that RCS (messaging via wifi connection similar to imessage - samsung messages app supports it in pie I believe, not sure about oreo) is active in verizon now including mvnos. Have you tried it?
Click to expand...
Click to collapse
I tried for my unlocked note 8. For the new sim coming from red pocket, it works great at the first time. But later when I switch the sim to a GSM sim for international travel and then switch the sim back to the red pocket sim, the same problem appeared. I have to use verizon sim to get LTE/CDMA back in the emergency mode.

queenriver said:
I tried for my unlocked note 8. For the new sim coming from red pocket, it works great at the first time. But later when I switch the sim to a GSM sim for international travel and then switch the sim back to the red pocket sim, the same problem appeared. I have to use verizon sim to get LTE/CDMA back in the emergency mode.
Click to expand...
Click to collapse
Traded in my S9 with an S10+ and the redpocket CDMA sim works now!

ToyTank said:
.My old Red Pocket SIM would not work on the S9, but my renewal came with a new SIM, ending in 8222-15XX (old was 8180-50XX) For ****s and giggles I put it in and it showed LTE/CDMA and verizon. Had RP CS switch my active SIM and now it works with no workaround!
Click to expand...
Click to collapse
I think you've found the answer for those who are unable to get their existing RP SIM to work on the S6-7-8-9's running OREO or PIE. I just took a later serial numbered CDMAV SIM (89140000018821472XX), inserted it into another S8+ that I have, booted it and saw the Verizon Wireless scroll across the top. I'll chat with RP today and see if they will switch the ICCID numbers between old and new.
After countless hours looking into this problem, I tip my hat to you for the solution provided.

Try as I may, in the end it didn't work for me.

It worked for me when I flashed the latest un-branded U1 firmware G960U1 UEU6CSI1 via the patched Odin, from:
https://updato.com/firmware-archive-select-model/?record=E68EDDB6DBFB11E99E59FA163EE8F90B
I've also done a full factory reset from recovery after the flash.
I guess they must have fixed it with the latest firmware updates... ymmv

Since the August update, both of my Verizon branded S8+'s work directly upon inserting a RP sim card.

POSSIBLE SOLUTION!! (YMMV)
I had a similar problem when I upgraded to Android 10. I no longer had CDMA as a choice for Network mode. Here is the solution that worked for me:
Step #1:
Go to the phone dialer and dial *#*#4636#*#*
This will bring up a new screen
Select "Phone Information"
You will be greeted with a scary-looking screen with lots of stuff
Scroll down and look for "Set Preferred Network Type"
Select "LTE/CDMA auto (PRL)" from the drop-down
This will give you phone service... but not data.
STEP #2
To get data services, you will need to create an APN.
Go to settings/connections/mobile networks/Access Point Names
Click on add and enter the following:
APN Name: Verizon
APN: VZWINTERNET
MCC: 311
MNC: 480
Authentication Type: None
APN Protocol: IPv4/IPv6
APN Roaming Protocol: IPv4/IPv6
I found that this APN worked for me... (YMMV)
Hope this is helpful...

are you folks still having trouble with this? it doesnt seem like a difficult obstacle to overcome

Thank you sooo much! Creating the APN did the trick.

Now data after returning to stock

Ok so I had to reactivate my Z2 Force Sprint., and after set up I do not have any data. It show 3G then LTE then nothing.. I tried flash all twice, but still can't get full data.. I was on Lineage, but went back to stock as I was going to sell this phone.. but now I'm not sure how to proceed. Any ideas will help thanks.

doubledragon5 said:
Ok so I had to reactivate my Z2 Force Sprint., and after set up I do not have any data. It show 3G then LTE then nothing.. I tried flash all twice, but still can't get full data.. I was on Lineage, but went back to stock as I was going to sell this phone.. but now I'm not sure how to proceed. Any ideas will help thanks.
Click to expand...
Click to collapse
I'm in the same situation, update from nougat to Oreo and I ran out of mobile network, if I find any solution, I'll let you know.

Sprint is suppose to be sending me another phone. Will see, so I went and relocked the bootloader.. At this time I don't care if it is stock or not.

doubledragon5 said:
Sprint is suppose to be sending me another phone. Will see, so I went and relocked the bootloader.. At this time I don't care if it is stock or not.
Click to expand...
Click to collapse
Hope u have...
Luck I can't do that because I'm not from US

svenrod09 said:
Hope u have...
Luck I can't do that because I'm not from US
Click to expand...
Click to collapse
I went to Motorola to get the factory images for this phone, can't seem to find any.. funny with bootloader locked, I get a message, that a different software other than factory installed on phone.. How, when I flashed the flashall that is suppose to be 100 percent stock.

Found out what appears to be the issue.. Up at Sprint, my ICCID (sim) Doesn't match what's in the phone.. Why I do not know.. I gave them two other sim cards, and they claim they are not compatible but, one is the original one from the phone.. So tomorrow I have to go to Sprint and get another.. To add insult to injury, the Galaxy S6 I purchased, and billed as new.. In fact is not new, was a refurbished unit.. Ok, but the mic does not work.. Went to Sprint to get it replaced $75, but because it has a after market screen and not original, they won't touch it.. Again, no mentioned at time of purchase.. Luckily for me I'm getting my money back on it.. Talk about a bad day, and a couple of effed up phones..

Did Lineage OS work?
doubledragon5 said:
Ok so I had to reactivate my Z2 Force Sprint., and after set up I do not have any data. It show 3G then LTE then nothing.. I tried flash all twice, but still can't get full data.. I was on Lineage, but went back to stock as I was going to sell this phone.. but now I'm not sure how to proceed. Any ideas will help thanks.
Click to expand...
Click to collapse
Doubledragon5,
Did having your phone on Lineage OS allow you to use data/calling/network service?

JTC Intl said:
Doubledragon5,
Did having your phone on Lineage OS allow you to use data/calling/network service?
Click to expand...
Click to collapse
I got the same question...

JTC Intl said:
Doubledragon5,
Did having your phone on Lineage OS allow you to use data/calling/network service?
Click to expand...
Click to collapse
If your on Sprint and talk and surf at the same time. Then No

doubledragon5 said:
If your on Sprint and talk and surf at the same time. Then No
Click to expand...
Click to collapse
Sorry, I need to clarify. Alot of Moto Z2 Force users have issues using their "unlocked" phones on compatible carriers. For instance, I have an unlocked Sprint Version of the phone, yet cannot use it on the Verizon network (even though both phones have compatible hardware). So there must be a glitch or Carrier lock in the phone's "Software Channel" preventing people from using their device on other networks (aka: have their phone unlocked).
Did using Lineage OS allow you to use your phone with whatever carrier (SIM change) without any modification besides the OS?
Please let me know if I need to clarify any further. Thank you!
Get Verizon Network to work on your Sprint Moto Z2 Force!
Follow these steps!
https://forum.xda-developers.com/z2-force/how-to/free-sprint-moto-z2-force-carrier-t3843824

JTC Intl said:
Sorry, I need to clarify. Alot of Moto Z2 Force users have issues using their "unlocked" phones on compatible carriers. For instance, I have an unlocked Sprint Version of the phone, yet cannot use it on the Verizon network (even though both phones have compatible hardware). So there must be a glitch or Carrier lock in the phone's "Software Channel" preventing people from using their device on other networks (aka: have their phone unlocked).
Did using Lineage OS allow you to use your phone with whatever carrier (SIM change) without any modification besides the OS?
Please let me know if I need to clarify any further. Thank you!
Click to expand...
Click to collapse
Sorry. I did not use my phone on any other carrier.. But I believe this phone you can use on T-Mobile, Cricket or even AT&T.. Providing it is also GSM compatible.. A buddy of mine recently left Sprint, and has a Iphone 7 and he went to Cricket.. Best move he every made.. And not that the GSM is unlocked he can talk, and do internet without issues. I hope this helps. I also now have a LG G7 ThinQ as I was having issues with LTE and Call issues, and Sprint sent me that, and I sent then back my Moto Z2 Force.

JTC Intl said:
Sorry, I need to clarify. Alot of Moto Z2 Force users have issues using their "unlocked" phones on compatible carriers. For instance, I have an unlocked Sprint Version of the phone, yet cannot use it on the Verizon network (even though both phones have compatible hardware). So there must be a glitch or Carrier lock in the phone's "Software Channel" preventing people from using their device on other networks (aka: have their phone unlocked).
Did using Lineage OS allow you to use your phone with whatever carrier (SIM change) without any modification besides the OS?
Please let me know if I need to clarify any further. Thank you!
Click to expand...
Click to collapse
Verizon is the only carrier you can't use. Verizon is a CDMA carrier. They must have your IMEI in their database to get calls, sms, MMS, etc. AT&T works, T-Mobile works... They are GSM so as long as the phone can connect to the towers, they don't care really.

Uzephi said:
Verizon is the only carrier you can't use. Verizon is a CDMA carrier. They must have your IMEI in their database to get calls, sms, MMS, etc. AT&T works, T-Mobile works... They are GSM so as long as the phone can connect to the towers, they don't care really.
Click to expand...
Click to collapse
Verizon is ALSO GSM and 4G LTE...and switching over to 5G. Strange thing is, when we initially got the Sprint phone and put in the Verizon SIM card, the phone actually recognized the Verizon SIM and all data, network, and calling WERE working, without having any dialog with Verizon (ALSO: without the phone's IMEI number on Verizon's database). It wasn't until the phone was updated to a more current Oreo Operating System that the SIM card wasn't recognized. Leading me to understand/believe that THERE DOES EXIST a ROM that allows a Sprint Moto Z2 Force to work on the Verizon network...just a matter of finding which one.
Also, when we installed Lineage OS onto the Sprint Moto Z2 Force, the Network options actually ALLOWED us to put in Access Point Name (APN) fields, but prevented us from saving them, saying user access denied (Rooting the phone may allow access to these settings?).
Also, once Lineage OS was installed, the Network could be taken off from, "Actively Connect" to a network and re-directed to a Carrier specific Network...Verizon being one of them, yet when doing so, we received an error message, "SIM card prevented linkage"....This we are assuming IS an issue with the IMEI (???), yet the IMEI # is different than the SIM #.
We currently are trying to work with Verizon Wireless to alter their, "Bring Your Own Device" settings to see if they WILL ALLOW a compatible hardware phone to be added to their platform by adding the IMEI to their database...
Still trouble shooting and fingers still crossed...
UPDATE:
Verizon working on Sprint Version Moto Z2 Force via Oreo OCXS27.109-48-3 (NOT listed in Motorola mirrors lolinet firmware page). We suggest doing an install of an older version of Oreo (i.e., OCX27.109-48 from 3/2018), then a "Motorola System Update" will pop-up suggesting you to update to version Oreo OCXS27.109-48-3...once install has completed, pop in your Verizon SIM card and voila! Network connection, data service, hotspot, & voice calling all working!
Now the key is to NOT do any future updates and disable the app "System Update" and force stop "Motorola Update Services" (if rooted, disable it!).
We're still working on what Sprint Applications can/need to get disabled, as notifications for "Mobile ID and "Mobile Installer" are still on the pull down notification screen. (Rooting most likely required for these).

activate preferred LTE band(s) permanently

I have G710EAW (LG G7+) which has by default active LTE Bands 1,3,5,7,8,28. However I live in Europe and I with my carrier I would benefit from band 20 as well.
What I am doing currently, is via service menu I am activating manually all the bands I need (including band 20) in modem settings. This works perfectly fine, actually I am so used to it I can do it within seconds. Naturally after phone restart all is reverted.
It is a minor inconvenience, hence the question: any idea how to make the setting persistent or any tool that would do it after each reboot?
I would like to avoid installing firmware from other model (if that's even possible, I am layman in this...)

quli said:
I have G710EAW (LG G7+) which has by default active LTE Bands 1,3,5,7,8,28. However I live in Europe and I with my carrier I would benefit from band 20 as well.
What I am doing currently, is via service menu I am activating manually all the bands I need (including band 20) in modem settings. This works perfectly fine, actually I am so used to it I can do it within seconds. Naturally after phone restart all is reverted.
It is a minor inconvenience, hence the question: any idea how to make the setting persistent or any tool that would do it after each reboot?
I would like to avoid installing firmware from other model (if that's even possible, I am layman in this...)
Click to expand...
Click to collapse
I don't know if Tasker needs root but you may be able to accomplish it with Tasker.
Although it may be a pain to setup i think tasker has a subreddit that you may be able to ask somebody who uses it more than I do

quli said:
I have G710EAW (LG G7+) which has by default active LTE Bands 1,3,5,7,8,28. However I live in Europe and I with my carrier I would benefit from band 20 as well.
What I am doing currently, is via service menu I am activating manually all the bands I need (including band 20) in modem settings. This works perfectly fine, actually I am so used to it I can do it within seconds. Naturally after phone restart all is reverted.
It is a minor inconvenience, hence the question: any idea how to make the setting persistent or any tool that would do it after each reboot?
I would like to avoid installing firmware from other model (if that's even possible, I am layman in this...)
Click to expand...
Click to collapse
Hi, I'm also looking to buy the EAW version for the dual sim feature. So you confirm the phone has all the LTE bands but some of them are locked by the software installed?
I need a phone dual sim that works in Europe and USA....

irondog said:
Hi, I'm also looking to buy the EAW version for the dual sim feature. So you confirm the phone has all the LTE bands but some of them are locked by the software installed?
I need a phone dual sim that works in Europe and USA....
Click to expand...
Click to collapse
Well I do believe Qualcomm Snapdragon is an excellent platform and the build-in modem is capable of all bands. I do have EAW version (I think originally from Hong Kong).
The band selection is not available from OS, but if you dial *#546368#*710# there is a hidden menu where in
Field Test -> Modem Settings -> LTE Band Selection I have these bands available:
1,2,3,4,5,7,8,12,13,17,20,25,28,29,30,38,40
To my limited experience any combination works just fine (I am in central EU). The drawback is that after reboot (or airplane mode) only the default (1,3,5,7,8,28) are on.

Just for the hell of it. I tried on my US phone, can't even access the menu Sucks.

doubledragon5 said:
Just for the hell of it. I tried on my US phone, can't even access the menu Sucks.
Click to expand...
Click to collapse
It works for me on the T-Mobile variant you have to use the stock lg dialer and type the code in you cant just copy it in

How do you know this has worked? I toggled on the bands that I need bu there was no 'success' or save prompt and if I exit and re-do the process all the boxes are un-ticked when I navigate to the LTE bands page.

Joe199799 said:
It works for me on the T-Mobile variant you have to use the stock lg dialer and type the code in you cant just copy it in
Click to expand...
Click to collapse
I tried on my us sprint variant and cant access the menu either

Joe199799 said:
It works for me on the T-Mobile variant you have to use the stock lg dialer and type the code in you cant just copy it in
Click to expand...
Click to collapse
Sorry for late reply.. I'm using stock dialer, and enter in manually, still doesn't work.. Maybe it is a T-mobile code or something.. I'm not use to having a phone were I can't access the hidden menues..

doubledragon5 said:
Sorry for late reply.. I'm using stock dialer, and enter in manually, still doesn't work.. Maybe it is a T-mobile code or something.. I'm not use to having a phone were I can't access the hidden menues..
Click to expand...
Click to collapse
Weird it takes me right to the menu once I hit the # sign on the end

I get the menu ok just no indication it has worked and the setting has stuck.

LG G710ULM UNSUPPORTED VoLTE ?!? (Straight-Talk US - T-Mobile network)

*********UPDATE********** I bought a new sim from straight talk and VOLTE works now! (GSM compatible Straight Talk Sim card) My old sim was from 2014, so it wasn't VOLTE compatible.
I have an ebay zombie LG G710ULM flashed to latest Google Fi Android 9 software, I received an email from Straight Talk (Wal-Mart US cell phone service reseller) telling me that my LG G7 does not support VoLTE and my phone will be unable to receive calls in January 2021.
-Using a network info app, the app is telling me it is connected to T-Mobile towers (so I have a Straight Talk T-Mobile compatible SIM)
-I can't find any options to enable VoLTE in settings, and wifi calling is erroring out
I was wondering if there are ways to get VoLTE and Wifi Calling working (Straight Talk supports it, but not my current ROM/SIM).
I can switch to the following sims supported by Straight Talk.
-AT&T Compatible Sim
-Verizon Compatible Sim? If my phone supports CDMA bands
OTHERWISE MOST OF US WILL HAVE A PAPERWEIGHT IN 2021!!!!!!!!!

Same problem
I'm having the same problem. Any progress on this?

I'd like to know this too. Surprised there is no traffic here with all the knowledgeable people on this forum.
G710EAW here. BTW There was an Android 10 update just two hours ago from Android 9. Someone with an 'EM' phone in another thread said VOWifi is "working now" but how do others know if it's working when January 1st comes around?

Falkentyne said:
I'd like to know this too. Surprised there is no traffic here with all the knowledgeable people on this forum.
G710EAW here. BTW There was an Android 10 update just two hours ago from Android 9. Someone with an 'EM' phone in another thread said VOWifi is "working now" but how do others know if it's working when January 1st comes around?
Click to expand...
Click to collapse
If you guys have cross flashed roms, then volte will not work. It doesnt work for any of us who have crossflashed. Whichever model.
You need to be on original software. Looks like some licensing thing that volte requires. They need to provision volte for all the phones. Sounds like they are not interested to provision it for g7. Odd that even EAW model which has original firmware, they sent that mail too....
Sad/Odd to see your carriers are suddenly changing to only Volte.

Is there a way to put it back to original software? I actually don't need it crossflashed to anything because it's a Verizon originally and I would like to use it on that network. Or does it not work that way?

Turnhoo said:
Is there a way to put it back to original software? I actually don't need it crossflashed to anything because it's a Verizon originally and I would like to use it on that network. Or does it not work that way?
Click to expand...
Click to collapse
Main issue is that your carriers dont want to provision volte for your G7s. So no guarantee if cross flashing back to original will work.
There is crossflashing guide in guides section with which you can go back to stock firmware. Do this at your own risk.
In our country we have a volte carrier called Jio. They provide an app called jiocall. Using that app you could use their service even if your phone is not volte capable. You will have to see if there are such apps for your carrier. Thats the only non technical, simpler solution.

I have some information that might make all of you guys happy.
I was told by Safelink Wireless that VOTLE is a function of BOTH the phone *AND* the sim card.
Basically, if the phone itself is VOLTE compatible but the sim card is not, then the phone will be reported on their system as not compatible, and will ask you to upgrade your phone.
However if a VOLTE compatible SIM is inserted, if the phone does in fact support VOLTE, it will then work. That's because it's provisioned on the carrier via the sim card itself.
If you purchased a sim via the "Buy your own sim" package, e.g. online or from Best Buy, etc, awhile ago, then that sim is not compatible. You simply need to call Tracphone/Safelink and ask to buy a VOLTE compatible SIM (which costs 99 cents). Then when you get it, call their tech department to have them transfer the phone service and phone number to the new SIM.
You can dial the phone's service menu and go to the VOLTE/GPRI menu and if the options are there, then the phone supports it.

What's the correct service menu number for our phones?

Falkentyne said:
I have some information that might make all of you guys happy.
I was told by Safelink Wireless that VOTLE is a function of BOTH the phone *AND* the sim card.
Basically, if the phone itself is VOLTE compatible but the sim card is not, then the phone will be reported on their system as not compatible, and will ask you to upgrade your phone.
However if a VOLTE compatible SIM is inserted, if the phone does in fact support VOLTE, it will then work. That's because it's provisioned on the carrier via the sim card itself.
If you purchased a sim via the "Buy your own sim" package, e.g. online or from Best Buy, etc, awhile ago, then that sim is not compatible. You simply need to call Tracphone/Safelink and ask to buy a VOLTE compatible SIM (which costs 99 cents). Then when you get it, call their tech department to have them transfer the phone service and phone number to the new SIM.
You can dial the phone's service menu and go to the VOLTE/GPRI menu and if the options are there, then the phone supports it.
Click to expand...
Click to collapse
Update, I recently bought a new sim and I have VOLTE right now on ULM android 9 latest security fix LG G7 image, running on Straight Talk.

took a while to understand lgup but my 710 oulm had a type oreo that the guy said couldnt be but i crossed flashed it to 10 i dont see the rom anymore and i hope i put it on another drive it was a canadian rom for android 10 works great otherwise im looking to get volte active in the *#*#4636#*#* phone menu you can see "provision for the setting under the radio on off but its a grey area the buttons dont work could be good could be bad its definately part of 10 but ?? grey areas preferred network could be sketchy to play with the phone initially on transition had incredible link up speed now its giving me a pain because assume i played with the connection preferences tab and its a registration error like dum just use the assigned sim guys and stop trying to mac or identify with every device anyway its the registration of a telephone number robo heads

4G voice quit working

After many unfruitful hours on helplines both carrier (TracFone) and Google helpdesk I thought maybe there would be some help here from a person who knows more than a diagnostic tree book. 4G voice just quit, wont dial even, just immediately says call ended. 3G still works and they both still do data. I've reset, cleared cache on phone app and connectivity services, restarted, airplane on and off, basically everything I could think of short of a factory reset.
I think this is the most significant thing but it was disregarded by all call operators: I swapped the sim with my wife's phone and it didn't help.
To my limited understanding this made my phone hers in the eyes of the carrier.
So I felt that this eliminated the carrier as the fault, unless they have some file that says don't allow 4G voice on Pixel 2xl's.
The only other thing I can think of beyond some Google conspiracy to make me buy a new phone is the Qualcomm com chip 4G voice parts have quit.
So anyhow I throw myself at your feet and hope someone has some knowledge or experience to relate.
If I could afford a new phone I'd just dump it.
Thanks!

Does your wife use the same carrier as you? If yes, can you try a sim from a different carrier? Did your sim work in your wife's phone?
> To my limited understanding this made my phone hers in the eyes of the carrier.
Not quite. The carrier can still identify the phone by IMEI.
> unless they have some file that says don't allow 4G voice on Pixel 2xl's.
Actually, the carriers often have lists of models that they white- or blacklist for VoLTE. And the phone's firmware must contain the correct configuration for VoLTE on that specific carrier. But it's unusual that it stops after having worked.
> the Qualcomm com chip 4G voice parts have quit.
I don't think there's much hardware involved that isn't also used for other things. A hardware problem seems very unlikely.

runekock said:
Does your wife use the same carrier as you? If yes, can you try a sim from a different carrier? Did your sim work in your wife's phone?
> To my limited understanding this made my phone hers in the eyes of the carrier.
Not quite. The carrier can still identify the phone by IMEI.
> unless they have some file that says don't allow 4G voice on Pixel 2xl's.
Actually, the carriers often have lists of models that they white- or blacklist for VoLTE. And the phone's firmware must contain the correct configuration for VoLTE on that specific carrier. But it's unusual that it stops after having worked.
> the Qualcomm com chip 4G voice parts have quit.
I don't think there's much hardware involved that isn't also used for other things. A hardware problem seems very unlikely.
Click to expand...
Click to collapse
TF went over the IMEI several times and said it was cleared for 4GLTE.
The problem was solved by moving to Mint, not only do I again have VoLTE but the call clarity is incredible, I actually had to turn down the volume.
I filed with the FCC and started a chargeback with VISA against TF.
Thanks for your reply!
LEARNED: A temp try us Mint sim is a CHEAP diagnostic tool!