Develop Bugs

[Q] Verizon HTC ONE can't add new APN

hi, I have verizon htc one running on stock 4.4.3, sense 6.0. I want to use it in europe on gsm network, voice and text works perfectly, but I can not use data because I can't add new APN. there is not options to add new one in access point names. when press on three dots just comes up "reset to default". so what should I do now?

I would call vzw to unlock your SIM, then plug in a prepaid SIM from a local European carrier.
Sent from my Lunar Ecliptic One.

Settings > Mobile Data > Network Preference
They include many apns already in there...

santod040 said:
Settings > Mobile Data > Network Preference
They include many apns already in there...
Click to expand...
Click to collapse
found, I should enter mcc mnc codes, thanks

I have this same issue. I was already overseas, and couldn't add or edit the APN I needed to use for O2.
I've called Verizon multiple times and they say "it's already unlocked" over and over again.
Is there anybody out there with a Verizon HTC One and is able to edit the APN data? If so, what did you do to get the phone to allow you to do that?

same here. using a Verizon HTC One (M7) on Rogers network in Canada. i cannot edit the existing APN or add a new one at all. i am connected to the internet, but it shows an 'E' instead of '4G', and it's very slow. any work arounds?
also, when i try changing Network Preferences and adding Rogers' MNC, (302720), it tells me my Network Preferences list is full and won't save anything when, in fact, it's actually completely empty! any ideas?

darxider said:
same here. using a Verizon HTC One (M7) on Rogers network in Canada. i cannot edit the existing APN or add a new one at all. i am connected to the internet, but it shows an 'E' instead of '4G', and it's very slow. any work arounds?
also, when i try changing Network Preferences and adding Rogers' MNC, (302720), it tells me my Network Preferences list is full and won't save anything when, in fact, it's actually completely empty! any ideas?
Click to expand...
Click to collapse
Does Rogers use LTE band 13? If not, you will not get 4G. As for HSPA/3G for GSM, the phone only has 900 and 2100 mhz for it. So if your carrier doesn't support those frequencies, you are stuck on edge (E).
http://www.htc.com/us/smartphones/htc-one-m7/
Specs tab shows the frequencies I discussed that the phone can support.
Edit: I also put this info on our Q&A thread.
[SIZE=+1]Q2: can I SIM unlock this phone for other carriers?[/SIZE]
The m7wlv comes SIM unlocked out of the box. It only works on certain frequencies. See if your carrier supports the below frequencies.
CDMA: 800/1900MHZ,
UMTS/HSPA: 900/2100MHz,
GSM/GPRS/EDGE: 850/900/1800/1900MHz,
LTE: 700MHz (Band 13)(only Verizon uses this LTE band thus far)​
Click to expand...
Click to collapse
It has many common issues people run into: http://forum.xda-developers.com/showthread.php?t=2875695
Sent from my HTC6500LVWBLU using XDA Free mobile app

darxider said:
same here. using a Verizon HTC One (M7) on Rogers network in Canada. i cannot edit the existing APN or add a new one at all. i am connected to the internet, but it shows an 'E' instead of '4G', and it's very slow. any work arounds?
also, when i try changing Network Preferences and adding Rogers' MNC, (302720), it tells me my Network Preferences list is full and won't save anything when, in fact, it's actually completely empty! any ideas?
Click to expand...
Click to collapse
Did you go to network preferences and click add....then click operator list. Scroll down the monster list and add Rogers wireless? Once you add it you need to reboot for the apns to autopopulate. With the new way of doing it they autopopulate.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

^ the list shows up as completely empty! there is nothing in it, and i can't click on anything! it's so weird given all this, it tells me "the list is full"!

darxider said:
^ the list shows up as completely empty! there is nothing in it, and i can't click on anything! it's so weird given all this, it tells me "the list is full"!
Click to expand...
Click to collapse
Screenshot?

here (as you can see, the list is empty, but it's telling me that it's full!):
and when i add Rogers Wireless by entering the MCC / MNC manually, i'll get this:
and going back to the previous page gives this message:
also, i cannot edit or add any APNs at all.
i'm sure it's the phone. is it SIM locked? (it shouldn't be given that it's from Verizon, but i got it as a replacement from Verizon because my first one had a faulty GPS, and it was refurbished.)
any ideas?

darxider said:
here (as you can see, the list is empty, but it's telling me that it's full!):
also, i cannot edit or add any APNs at all.
i'm sure it's the phone. is it SIM locked? (it shouldn't be given that it's from Verizon, but i got it as a replacement from Verizon because my first one had a faulty GPS, and it was refurbished.)
any ideas?
Click to expand...
Click to collapse
When you click add.. don't click add network code. Click operator list.

i didn't click on anything. that's the window that pops up when i go t Network Preferences List. i cannot do anything else.
i really think it's a phone software issue (the same phone, using a Verizon SIM card, was able to connect to Rogers' 3G network while roaming)...something must have messed up the software. funny thing is that with the Verizon SIM card, i could look at the operator list and add/edit the APN and all that.
is there any way, short of a factory reset, to revert the settings back? could it be that the phone is really SIM locked?

Having the exact same problem
I'm having the exact same problems as those described above... I am on a fully stock Verizon M7 with the latest official release. Not rooted.
- cannot add new apn.... Option missing from he apn menu
- when i attempt to edit the existing apn, all i can do is edit one line... The apn itself. All other lines are grey and will not allow me to change the settings.
- with a non Verizon sim in the phone i was also having the " network list full" errors described above...
I was in Europe with Lebara mobile sim and was able to get on 3g but it was unstable as apn settings were incorrect and not editable. I was in the UK on a 3 mobile sim and all was the same. Now back in the US, the same problems above with apn add/edit are still there though my "available networks" settings are behaving normally with the Verizon sim in there.
IT must be something wacky with this build or Sense 6 as my GF is also on Verizon and her Razr Maxx had none of the above problems as she travelled with me with the same carrier sim cards as i was using.

yeah, it's very annoying. maybe we should contact Verizon to figure out what's going on.

Exact same problem - no option to add APN or add network
darxider said:
yeah, it's very annoying. maybe we should contact Verizon to figure out what's going on.
Click to expand...
Click to collapse
I have an HTC One with the exact same problem. It won't let me put in the proper settings to activate mobile data on the Mexican Telcel network. It was a Verizon phone which is unlocked and will do voice and text but since the APN settings are not allowed to be edited it is not data capable. I'm in Mexico for a few months and this is ridiculous. According to Verizon "of course your phone is unlocked. We haven't sold locked phones in years." I guess they aren't locked now they are disabled or crippled when you try to take them to other networks. BTW this isn't just a problem of us not knowing how to input APNs, this is the problem of the phone not allowing editing at all. Very, very frustrating. Especially when you find out that root is almost impossible when it has the latest over the air update.

Factory Reset Doex Not Fix This
Confirming that factory reset does not fix this. So don't waste your time... Ih yeah, and HTC backup and restore service is down until further notice... Another fun surprise

Maybe I'm wrong but I thought you needed to be boot loader unlocked and s off to edit the apn and mcc list since they are system level files. You need read/write ability for the system in order to do that which requires root.

nevermind

^ what does this "nevermind" refer to?

AT&T Incoming Call to Voicemail. AT&T users I need you help

I need AT&T users to test this for me. On my wife's 5X on AT&T it seems like every call goes to voicemail first but if you call back it will ring. Could someone test and see if they are getting this? If not do you know how to fix? Thanks

I'm receiving calls just fine on mine. I'm on att trough net10 though so I'm not sure if that's different.

I'm on AT&T and no trouble receiving calls for me.

So odd, spent some time with att on the phone. My suspicion is that when a call is coming in since we do not have volte it drops to h+ which has a weak signal and goes to vm... When will att allow volte for not att phones?! Thanks all
Sent from my Nexus 6P using Tapatalk

if you haven't yet, I would reset/flash as new without sim and then reinsert sim and go through setup as stock. No google voice or hangouts or forwarding and see what happens.
my 5x hadoffs between lte and h+ happen a bit depending where I am at my house, and I don't have any problems. MY last thought is check airplane and do not dusturb, but still. I would start at the beginning.
maybe you've already done this.

joshuadjohnson22 said:
So odd, spent some time with att on the phone. My suspicion is that when a call is coming in since we do not have volte it drops to h+ which has a weak signal and goes to vm... When will att allow volte for not att phones?! Thanks all
Click to expand...
Click to collapse
I also have AT&T, and no problems receiving phone calls. I had to get a new SIM card when I got the phone (nano SIM to replace the micro SIM that I had used in my old Nexus 5). I noticed that the APN that was the default on this phone is "ATT Nextgenphone", instead of the "ATT Phone" APN that my old Nexus 5 used. The old "ATT Phone" still shows up as an option, but I figured that I'd just leave it as is (on the "ATT Nextgenphone" APN. I don't know much about it, but from googling around, I believe that this APN is for VoLTE. (http://developer.att.com/technical-library/apns/apn-descriptions-and-characteristics). Might want to check APN settings and see if you can change it to Nextgenphone.

jss2 said:
I also have AT&T, and no problems receiving phone calls. I had to get a new SIM card when I got the phone (nano SIM to replace the micro SIM that I had used in my old Nexus 5). I noticed that the APN that was the default on this phone is "ATT Nextgenphone", instead of the "ATT Phone" APN that my old Nexus 5 used. The old "ATT Phone" still shows up as an option, but I figured that I'd just leave it as is (on the "ATT Nextgenphone" APN. I don't know much about it, but from googling around, I believe that this APN is for VoLTE. (http://developer.att.com/technical-library/apns/apn-descriptions-and-characteristics). Might want to check APN settings and see if you can change it to Nextgenphone.
Click to expand...
Click to collapse
Thanks but hers is also on that apn. I'm going to send it back to google and try a different unit. According to everything I have read VOLTE is only available on AT&T if you have their specific phones. I hope that changes soon but if I'm wrong and you are getting VOLTE please tell me. Of course the easiest way to test is to turn off wifi and while you are on LTE have someone call you and see if it drops to H or H+ or if it stays on LTE. Thanks!

I am am also having this same issue. People trying to call me are getting call failed messages and they have to dial 5 or 6 times before the call actually connects. I did you get a solution?

Help improve Verizon compatibility

The OP3 does work on Verizon, however there are some "issues" that can probably be easily fixed by someone who knows what they're doing (aka not me).
So far I can confirm 1X/3G (eHRPD) works. I have to enable data roaming for data to work, but I can make/receive calls, sms, mms, and cellular data.
I've also been able to force a connection to LTE by placing the phone into "LTE Only mode". However, when I do this sms, mms and calls don't work (only data works).
For some reason the phone defaults to 3G rather than 4G even though it can use both.
3G/4G data, sms, mms and calling are working, they just aren't working together.
I have done a lot of testing on ,apns and build.prop edits but I have not made any progress.
My personal theory is that the phone is defaulting to a US Cellular APN which then attaches to Verizon's network as a roaming partner.
I really need some help from the community to get this thing working right. Any help would be much appreciated.

I just wanted chime in and say I'm also on VZW and considering picking up an OP3. From reading your other thread, as long as I have XLTE/Band 4, I should be able to at least get some use out of the phone, correct?
The idea of unlocking Band 13 sounds like a fun challenge I'm willing to try!

@notjaykay I tried to unlock b13 but the nvram would reset after boot. Here's the link http://forum.xda-developers.com/showthread.php?p=67648238

I haven't tried to get LTE working, but I've been using Verizon on my OP3 for a week now. Most of the time I use Verizon only for SMS, MMS, and calling, but on several occasions when I don't have T-Mobile LTE signal, I switch to Verizon SIM for data, too. I only get 3G in this case, but it does work pretty well (albeit slow, at 3G speeds). I'm also interested in somehow getting the phone to play nicely with Verizon's LTE.

What about "telephony.lteOnCdmaDevice=1"
In build. Prop

george241312 said:
What about "telephony.lteOnCdmaDevice=1"
In build. Prop
Click to expand...
Click to collapse
I just made this change but I don't get Verizon LTE signal at my house, so I'll have to wait until I'm at work tomorrow to actually test it.

That build.prop edit will not get you LTE. I suggest using this app https://goo.gl/620Kc7 and setting it to "LTE Only". You may have to toggle the "turn radio off" option. Be patient and it will work. What you will find is that when in LTE only mode you will only get LTE data. I do all my calls and SMS/MMS using my Google voice number so I don't need traditional voice/sms services. However this is the point of this thread. For some reason the op3 defaults to ehrpd (3G) rather than LTE. Until volte gets working (doubt that will be anytime soon) we will reply on CSFB (circuit switch fallback) for voice and text. Not ideal but a lot better than what we have now.
I did find this folder with a .mbn file in the OSS firmware folder which shows volte config specifically for Verizon (check the attached screenshot)

Thanks for the info, @cdkg. I wasn't optimistic about the build.prop change having an effect, but it was an easy enough thing to try just in case. Unfortunately, in my case, LTE-only is out of the question, at least for now. I'm leaning toward porting my number to T-Mobile to give them a real try for a couple months anyway. However, if this whole compatibility with Verizon <=> OP3 thing ever gets totally worked out, I'd probably come back to Verizon.

OnePlus 7T Global ROM - Voice over Wifi (vowifi)

I've been looking all over the Internet about enabling Voice over WiFi on the 7T with the Global ROM. I've found several sites talking about the 7T Pro or 7 Pro, and I've tried those techniques and was able to get the voice over WiFi setting to show up, but when I toggle it on, it is turned off again the next time I enter the Sim menu. I've verified with Verizon that Voice over WiFi is turned on for my phone, my phone is registered in their DMD, so everything should be good on their end. It just seems to be an issue with my ROM not allowing me to use it. I apologize if this has been answered but I couldn't find one for the 7T that matched my situation.
Alternately, this was originally a T-Mobile phone that I converted to the Global ROM. How would I go about converting this phone to the regular US ROM (from here, for example) to see if that would fix my issue? I don't really *need* the Global ROM, I just installed it because that's what the conversion guides to get off the T-Mobile ROM prescribed.

I wouldn't expect the us rom to work for your issue if the global one does not. I'd also note that I find vowifi with it to be finicky without any display on why it might be failing. I have 2 sims in mine, and its well known now that one can't get vowifi working without the primary data sim being the sim you want to do vowifi. but even when I do that (and even set primary calling sim to the tmobile one), it more often than not, doesn't connect via wifi (i.e. pop up the icon). It has worked (i.e. I have been able to get the icon and place calls while in airplane mode to the US while overseas), but it hasn't proven to be reliable. Then again, it wasn't reliable either with just a t-mobile sim and the t-mobile rom. I just wish there were some logs that would say what was failing.

thetoady said:
I wouldn't expect the us rom to work for your issue if the global one does not. I'd also note that I find vowifi with it to be finicky without any display on why it might be failing. I have 2 sims in mine, and its well known now that one can't get vowifi working without the primary data sim being the sim you want to do vowifi. but even when I do that (and even set primary calling sim to the tmobile one), it more often than not, doesn't connect via wifi (i.e. pop up the icon). It has worked (i.e. I have been able to get the icon and place calls while in airplane mode to the US while overseas), but it hasn't proven to be reliable. Then again, it wasn't reliable either with just a t-mobile sim and the t-mobile rom. I just wish there were some logs that would say what was failing.
Click to expand...
Click to collapse
What process did you follow to get yours working?

I don't have verizon, as I noted. as I said, I would play around, set primary data and calling sims to the # I wanted for vowifi. Put it in airplane mode, turn on wifi. sometimes that would force the vowifi to come on / sometimes not. take it out of airplane mode. sometimes that did it hen the previous step did not, sometimes not. rinse and repeat.
I mostly gave up on it for now. The only US number I give out is my google voice # anyways, so it doesn't make a huge difference.

thetoady said:
I don't have verizon, as I noted. as I said, I would play around, set primary data and calling sims to the # I wanted for vowifi. Put it in airplane mode, turn on wifi. sometimes that would force the vowifi to come on / sometimes not. take it out of airplane mode. sometimes that did it hen the previous step did not, sometimes not. rinse and repeat.
I mostly gave up on it for now. The only US number I give out is my google voice # anyways, so it doesn't make a huge difference.
Click to expand...
Click to collapse
I only have one sim, so I don't think the issue is with it not knowing which is the primary. I tried the airplane mode trick but it just said I had no connection to dial. The issue with me is until I did the little hack shown here: (https://forum.xda-developers.com/t/guide-enable-volte-vowifi-on-all-devices-no-root.4105817/), I never even had the VoWiFi option, but even when I got it, it wouldn't stay enabled. I was thinking the US ROM would help because I am in the US and my carriers are all in the US. I felt like the Global ROM maybe wasn't compatible with Verizon or something.
Bonus question: Is there an easy way to search within a single thread on this forum? I can only find how to search all the forums and it makes it difficult to zero in on information.

Verizon DOES NOT support VoWiFi on the 7T. So far as I know they do not allow vowifi over their network on any non-verizon branded phone.
VoWiFi turns on, fails to get the proper authorization from Verizon to use their network, turns back off.
Even with the 1+ 8, the VZW model is the only one with vowifi on their network. I was told that it was due to “security concerns” since non-vzw phones didn't go through VZW testing.
Bonus answer: this is for website, not app.
Magnifying glass at top --> gear icon --> you so get a drop down with search options
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"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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"lightbox_stop_slideshow": "Stop slideshow",
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"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
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wfred said:
Verizon DOES NOT support VoWiFi on the 7T. So far as I know they do not allow vowifi over their network on any non-verizon branded phone.
VoWiFi turns on, fails to get the proper authorization from Verizon to use their network, turns back off.
Even with the 1+ 8, the VZW model is the only one with vowifi on their network. I was told that it was due to “security concerns” since non-vzw phones didn't go through VZW testing.
Bonus answer: this is for website, not app.
Magnifying glass at top --> gear icon --> you so get a drop down with search optionsView attachment 5197691
Click to expand...
Click to collapse
Thank you for the Search help, of course it requires clicking the button I'm so used to typing and hitting enter I don't even click those anymore.
On the Verizon VoWiFi, I wonder if results may vary on that, because they had told me it was enabled for my IMEI. Of course, that is largely dependent on the rep you get, I'm sure. But at minimum, I'd at least like to have the option to try it. Plus when I travel abroad, I would like to be able to turn it on for other carriers there as well. I did find another route that involves using PDC to manually enable it, but I'm going to have to root the phone for that. I'm not using the phone yet, so now is the time to play with it I appreciate your answer though, it may be for nothing, but I've got the mind of an engineer, you can't tell us no

I was unable to get either VOWIFI or SMS to work when I bought my unlocked 1907 7t (with global rom from factory) to work on Verizon. (Despite all the guides to do as such)
I both messaged them on their platform and called several times. Every time was same shtick. Them: "Phone doesn't support all features" Me: "Yes it does, has all bands, please add IMEI to database and turn on cdma-less provisioning" Them "Ok, hold please..." 5 min later... "Ok it should enable within 24 hours...when should we call you?" Me: "Same time tomorrow is fine" Them: "Ok, then"...24 hours later... no call, I call, repeat, no change.
They honestly just lie/yes man you to appease you until you give up/satisfied with their programmed responses. They have no intention of going out of their way in any technical capacity (Esp. if you're prepaid) and being forthcoming with their policy to only activate "Verizon Phones" on their network will never deliver a technical reason (this band/that band, etc...) This was not the first time I've had to attempt technical workarounds (on another global unlocked LG phone) , which also failed (on their end). They are an incredibly dishonest company imho.
So I got a T-mobile sim and it works great! (vowifi perfect!) I keep the old Verizon one in the second sim slot, just in case I want to punish myself at some point in the future ;0

See, my SMS works fine. That's why I say it seems to depend on the rep you get. I'm just really curious if I could get around the carrier block OnePlus has apparently put in place for VoWiFi (per their customer service), if I could get it working still.

hypercoyote said:
See, my SMS works fine. That's why I say it seems to depend on the rep you get. I'm just really curious if I could get around the carrier block OnePlus has apparently put in place for VoWiFi (per their customer service), if I could get it working still.
Click to expand...
Click to collapse
There is some sort of certification or something baked into VZW phones that their network looks for when you try to connect via VoWiFi. If that is missing VZW's network will not let you connect even if customer service ”activated” it.
It's not a carrier block 1+ put in place, it's a “not VZW certified” block that Verizon put in place.

wfred said:
There is some sort of certification or something baked into VZW phones that their network looks for when you try to connect via VoWiFi. If that is missing VZW's network will not let you connect even if customer service ”activated” it.
It's not a carrier block 1+ put in place, it's a “not VZW certified” block that Verizon put in place.
Click to expand...
Click to collapse
Oh, I see. Idk what OnePlus was talking about then, because they literally said they block VoWiFi if it's not T-Mobile.

Hi, this solution perfectly works for me. Link. So simple way to enable volte and vowifi without unlocking bootloader and rooting.

dearshakya said:
Hi, this solution perfectly works for me. Link. So simple way to enable volte and vowifi without unlocking bootloader and rooting.
Click to expand...
Click to collapse
With what carrier?

hypercoyote said:
With what carrier?
Click to expand...
Click to collapse
I use telefonica uk commercial since oos10 for malaysia and my telco is digi and unifi. but for 11 i use required to use from extracted mbns, so i tried using extracted pixel4 mbns. Still lookimg for op7T oos 11 extracted mbns.

Question Volte

Has anyone had this working yet, does it even have an icon to show its on because my network provided said the Pixel 6 has no option in the menu, does it even show on the phone if its working/on?

VoLTE is working fine with EE in the UK. There are no signs it is working from what I can see, except for the fact it stays on 4G rather than drop to 3G. I've had HD calls (shows the tiny HD icon when the call connects) on 4G as well.

You can check using the phone service menu (*#*#4636#*#* or a version of the same... I always have to check!).
Mine shows volte provision as on (EE UK)

Mine is greyed out
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Shipoftheline said:
Mine is greyed outView attachment 5445219
Click to expand...
Click to collapse
It depends on your carrier.
Some offer the ability to activate it on your own (call a number, send an SMS), some activate it automatically, some won't even give you the ability to deactivate it/activate it yourself.
It needs to be activated and attached into the carriers system as an information that it's activated for your contract.
Are you sure that VoLTE is activated properly?
I have no problems with activating it on my phone.

Morgrain said:
Are you sure that VoLTE is activated properly?
I have no problems with activating it on my phone.
Click to expand...
Click to collapse
I've been in touch with them today and Volte is active on their side but I've got no option

Same problem here ... Youfone network in Belgium ...
VoLTE works fine when I put the SIM card in my OnePlus 8 phone.
VoLTE does not work on the P6P if I insert the SIM card there.
I chatted to a Google support guy, he said it definitely is the provider whi must change something ... they claim the P6P supports VoLTE properly ...
But that is strange to me ... why would the SIM card have VoLTE in OnePlus phone and not in P6P? Could the provider really fix that? I doubt it ... but I am not a VoLTE specialist. I will contact provider anyway to see what they have to say.

Hmm ... I checked my provider's website ... they (explicitly) say that VoLTE is availabe for the following phone brands: Apple, Huwai, LG, OnePlus, Samsung, Sony, Nokia, Oppo. So maybe indeed the provider has to "activate" it for specific models/phones ...

I'm told after checking settings that Volte is switched on in fact it can't be turned off due to the carrier config file, greyed out on 'yes' however no Volte working.
The phone supports all the bands so this has to be an issue with the phone itself

Morgrain said:
Are you sure that VoLTE is activated properly?
I have no problems with activating it on my phone.
Click to expand...
Click to collapse
No option for Volte and carrier confirms this, Google has hidden it for some reason

Hmm ... see attach. Same issue here. VoLTE works on my OnePlus, does not work on P6P. Chatted with Google support (see attach); they claim it is the provider who has to activate it for the P6P model (which I find strange). I will check with my provider (but I'm pretty sure they will bounce me back to Google). Ping pong.

So I hate volte because if my phone signal is weak and it decides to call over data the call gets all distorted and robot like if you know what I mean!! So I always turn this feature off, normally! Been a Samsung user for years and always had a setting to turn volte off via the SIM/network menu, well as it seems I've had a few of the distorted calls and gone to turn of volte but not a setting in sight and I think I may have figured it out. Seeing this post triggered me look into it deeper and after using that phone code above to establish that the carrier volte setting is switched on but greyed out, as somebody posted above made me switch my SIM to My S20 and check the volte and I can confirm that although the mobile provider has it switched on permanently for active Sims the phone has the hardware to switch it off.
If you look at the screenshot from my Pixel 6 Pro and read what toggling the WiFi Calling switch does, it actually states "When Wi-Fi calling is on, your phone can route calls via Wi-Fi networks OR YOUR MOBILE'S NETWORK"
What I take from that is the toggle on/off is for both WiFi Calling and volte at the same time and we can't have them as independent switches like on my S20 and probably other phones. It makes sense as to why none of us can turn it off, which is cr*p. Especially when my mobile signal is dodgy in my house so I relay on WiFi Calling and sometimes as I have 2 AP's I could have low WiFi signal so it decides to use volte but my mobile signal is also weak thus making my robot distorted calls to happen. I'll be sending feedback via about/send feedback to Google and just hope somebody picks up on it.
Do you agree?
Unless I'm missing something then appolgies for waisting your time.
If you do agree please could you send feed back to Google via "settings/about phone/send feedback about his device" as the more reports they get we have a better chance of the toggles being separated.

m1ckbr1t said:
If you look at the screenshot from my Pixel 6 Pro and read what toggling the WiFi Calling switch does, it actually states "When Wi-Fi calling is on, your phone can route calls via Wi-Fi networks OR YOUR MOBILE'S NETWORK"
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I don't even have a setting 'Wifi calling' ... so I guess this is present in your case exactly because VoLTE is enabled.

foobar66 said:
I don't even have a setting 'Wifi calling' ... so I guess this is present in your case exactly because VoLTE is enabled.
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Have you opened settings and searched for wi-fi calling?? See screen shot. I'm guessing you have and if it's not there then possibly your network provider doesn't support either... Is your phone on the latest firmware?

m1ckbr1t said:
Have you opened settings and searched for wi-fi calling?? See screen shot. I'm guessing you have and if it's not there then possibly your network provider doesn't support either... Is your phone on the latest firmware?
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I do not have a setting when I search for "Wifi call". My phone is on the latest (November) firmware.

foobar66 said:
I do not have a setting when I search for "Wifi call". My phone is on the latest (November) firmware.
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That's strange and does your mobile network support both WiFi Calling and VoLTE services? If so then all I could possibly suggest is maybe a factory reset, making sure all your data is backed up first of course. It's a bit drastic I know but sometimes it does fix issues especially if the update missed some steps out when it was applied.

m1ckbr1t said:
That's strange and does your mobile network support both WiFi Calling and VoLTE services? If so then all I could possibly suggest is maybe a factory reset, making sure all your data is backed up first of course. It's a bit drastic I know but sometimes it does fix issues especially if the update missed some steps out when it was applied.
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Well, VoLTE for sure, when I put the SIM card in my OnePlus phone I have VoLTE (not wifi calling; that may be the reason why I don't see the entry in settings).

foobar66 said:
Well, VoLTE for sure, when I put the SIM card in my OnePlus phone I have VoLTE (not wifi calling; that may be the reason why I don't see the entry in settings).
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Quite possibly, like you can't have one without the other... If I'm correct that they have a joint on/off switch I really hope Google fix it. Hope you manage to get something sorted.

This is a carrier setting first and foremost. My phone came with it enabled on EE here in the UK, but not explicitly. I have Wifi Calling enabled on my phone as well, and I believe that works for wideband voice calls.
I've tried both VoLTE (unmarked in status bar, just as "HD" in call log) and VoWifi, both seem to work with my P6P.

Update: I've had one call where its shown as HD (Volte) on my call log even though the areas I go are all covered by Volte so I'm going to guess this is down to the rather poor modem on this handset which shows weak signal strength compared to my last handout (Oneplus 8 Pro)