Database Users

Can't make calls when on LTE mode

I have n9005 rooted TouchWiz stock on 5.0,
when my phone is on LTE mode i'am unable to make/receive calls.
Kindly help me solve this problem.

Is the phone set to LTE only? If it is, does the carrier support VoLTE?

thahim said:
I have n9005 rooted TouchWiz stock on 5.0,
when my phone is on LTE mode i'am unable to make/receive calls.
Kindly help me solve this problem.
Click to expand...
Click to collapse
LTE/4G is a Data-Only network. To make calls over it your carrier needs to support Voice Over LTE, or VoLTE for short. Which is the mobile equivalent of VoIP.\
If your carrier does not support VoLTE, and your device is only allowed to access LTE, you can't make calls. Change to 'LTE/WCDMA (Auto)' (4G/3G) or 'LTE/WCDMA/GSM (Auto)' (4G/3G/2G) mode so the phone can automatically change to a network that supports voice codecs.

ShadowLea said:
LTE/4G is a Data-Only network. To make calls over it your carrier needs to support Voice Over LTE, or VoLTE for short. Which is the mobile equivalent of VoIP.\
If your carrier does not support VoLTE, and your device is only allowed to access LTE, you can't make calls. Change to 'LTE/WCDMA (Auto)' (4G/3G) or 'LTE/WCDMA/GSM (Auto)' (4G/3G/2G) mode so the phone can automatically change to a network that supports voice codecs.
Click to expand...
Click to collapse
My phone doesnt has LTE only mode so i keep it on LTE/WCDMA/GSM, still i can't make or rec calls.
Sent from my SM-N9005 using Tapatalk

How about switching to wcdma/gsm or wcdma only?

audit13 said:
How about switching to wcdma/gsm or wcdma only?
Click to expand...
Click to collapse
They work fine, but LTE.

thahim said:
They work fine, but LTE.
Click to expand...
Click to collapse
Something appears to be preventing the automatic switch from LTE to 3G/2G. Did you do something in the Servce menu?

ShadowLea said:
Something appears to be preventing the automatic switch from LTE to 3G/2G. Did you do something in the Servce menu?
Click to expand...
Click to collapse
My device didn't had the LTE option first so i did something which i don't remember now, what it was, i did it when i never used LTE, but as now i'm using LTE and came accross this problem. also i have installed a network type toggle app.

Sorry for being such a nub but where do I go to change the mode? Option > network operation? Thanks
Sent from Tapatalk {♤}

soul2eat said:
Sorry for being such a nub but where do I go to change the mode? Option > network operation? Thanks
Sent from Tapatalk {♤}
Click to expand...
Click to collapse
Network settings has that option for Network Type.

Regions  myanmar
Not receiving incoming calls on AIRTEL 4G LTE
Iam facing peculiar problem with the phone. Need help with the problem.
I am using samsung note 3 LTE. When ever some one tries to call me, my mobile is Not reachable or out of coverage area even when my mobile is in my hand , perfectly working with the second sim. outgoing calls are working fine. Again, when I am in call, then if any one tries calling me, then I get call waiting. So incoming call waiting is working for me. But incoming calls are not able to connect. LTE data is working fine though incoming calls are not working. 
Tried the following but no luck. Problem still persists:
1. Reset phone and erase all data
2. Hard reset phone (volume down + poweroff and clear all data in drive)
3. Tried changing SIM to second slot
When I switch the sim back to 3G mode or 2g mode , incoming calls are working perfectly fine . I googled it and found that most people had same issue and was resolved on switching back to 3G or 2g . 
But I need to use 4g . Please tell me a solution.

I had that same issue until I took my note 3 to Rogers and they said that the note 3 doesn't support Lte

Your rom must support VoLTE.

I would unroot and go back to stock firmware, and see if problem still happens,? if it does ,its most likely the sim card.sd card reader slot, (flex cable),my Galaxy s4 had the similar symptoms , but LTE would work with a custom rom, but not if I used stock firmware, replacing sim card reader flex , just google your mak and model and search ebay. mine cost a few pounds for a decent quality part, so dont go rushing to buy the cheapest. No problems since replacing that part, even after resetting phone 3 times to see if it was a fluke. I know its a bit late for a reply, but this actually worked , I am 99% sure it would work for anyone else who has this problem with lte not connecting when 3G, and 2g do connect. If you have tried swapping sim cards, putting sim in another phone,, etc,etc. this part mentioned(sim card/sd card reader) is your culprit. Took me just over 5 hours of testing to find the solution. thanks and fair well android users
---------- Post added at 06:49 AM ---------- Previous post was at 06:24 AM ----------
For many people having issues with LTE not connecting and diverting to voicemail on android, I am here to offer a solution to your woes. I have a Samsung Galaxy S4, GT-I9505, and recently in in 2018 in July, I had the same problem, phone calls connected on Gsm, Wdcma, BUT when I tried LTe mode, NOTHING, WENT STRAIGHT TO VOICEMAIL.Anyway I tried almost everything mentioned on certain websites and forums, with some luck, Changing LTE mode to GSM worked, and I could receive and hear phone calls. So I investigated further, I tried re flashing stock firmware, factory resetting phone.(nothing worked). I then rooted my phone and flashed a custom rom (do not try this) as it could damage your device if flashed wrongly. Yeah, so I flashed a custom rom, and low and behold problem disappeared, so I used my phone on LTE for 2 days, with no problems, I then decided to go bacjk to stock firmware, ...problem came back, not connecting to LTE mode..........being as patient as I can be, never gave up, and had a spare phone which was dead, just laying in the drawer, ..so ,I took phone apart and thought, it must be where simcard contact make contact with sim card reader contacts ( broken sim card /sd card reader part, and was I wrong, no, it actually was the sim card reader part which coonects with th motherboard, Voila, I am 99% sure if anyone else has this problem with any android that has LTE capabilities, and you know its not the sim card, then try this fix first, MAKING SURE YOU GET SOMEONE YOU KNOW TO HELP YOU , IF YOU ARE UNSURE OF WHERE TO BUY AD HOW TO FIT. hope this has helped,and I know it is a long thread, but hopefully it will be a solution that works for whoever reads and trie this, over and out. yours in sincerity, Tech82, from Surrey, England.

poddy82 said:
I would...
Click to expand...
Click to collapse
You are only 3 years too late. No big deal !
Sent from my Galaxy Note 8 using XDA Labs

In fairness post might be useful to some .
Where it is actually the sim holder .
But 99% of the problems are not the sim holder .
Though very odd that S4 user makes only one post and that's on a Note 3 forum not his phones forum .

i am facing the problem with my LGF180

This is Note 3 forum not your phone .

T-Mobile VoLTE, Voice Calls with OTA MM ?

Last I saw, it appeared that OTA Marshmallow 6.0 on Moto X Pure Edition had voice call problems with VoLTE enabled, on T-Mobile.
The workaround was to disable VoLTE (Disable "Enhanced LTE"), to maintain good voice calls quality.
Can anyone offer info on whether this is still a problem with OTA MM, T-Mobile, and VoLTE?
I'm staying with 5.1.1 until I see this resolved, either on T-Mobile end, MM, or maybe with a fix to some offending component or app.
TIA...

Please everyone let Motorola know about this bug so that they will fix it.
https://forums.lenovo.com/t5/Moto-X...l-audio-after-MM-upgrade-w-VoLTE/td-p/3239629

I read that thread a while back. My conclusion was there was insufficient resources when the screen off when on VoLTE. I'd think using a kernel manager with a custom kernel would let you set a higher cpu speed with the screen off, or maybe enable more cores to be available.

There still no fix for VolTE voice calls bug on this phone?

No fix. Motorola/Lenovo is basically ignoring us. You can see this in the long running Motorola support forum thread. Kernel change does not help as it has been tried already. Moto sucks.

That's a bummer. I think I'm going to return it before I loose the window. My last phone was an LG G2 and the VoltE worked flawlessly. It is sad that a newer/better specs phone is worse in that area than a 2013 phone.
Sent from my XT1575 using Tapatalk

If I downgrade to KitKat the bug will still be there? Or maybe use another modem/radio?

hachuelo said:
If I downgrade to KitKat the bug will still be there? Or maybe use another modem/radio?
Click to expand...
Click to collapse
KitKat does not exist for this device. Lollipop does not have the VOLTE bug. But you will loose band 12 LTE.

I don't think this is a Lenovo issue. I'm on AT&T and pretty much they only support VoLTE on their branded phones. Blame your carrier, not the phone. VOLTE does work on Verizon as I know two other people with this phone on VZ and once they got MM update, it worked.
Sent from my awesome phone!

aybarrap1 said:
I don't think this is a Lenovo issue. I'm on AT&T and pretty much they only support VoLTE on their branded phones. Blame your carrier, not the phone. VOLTE does work on Verizon as I know two other people with this phone on VZ and once they got MM update, it worked.
Sent from my awesome phone!
Click to expand...
Click to collapse
That could be true. T-Mobile tells me they are aware of it.

kevev said:
That could be true. T-Mobile tells me they are aware of it.
Click to expand...
Click to collapse
I don't want to jinx myself but I have had my XT1575 (US) since October but recently switched to T-Mobile from VZ. Although my bootloader is still unlocked, I am running stock 6.0 (24.201.3 - Feb Security Update) and have had zero VoLTE issues (even on VZ it worked fine once enabled on my account)... Still no Wifi-Calling (on either carrier) with my XT1575, but HD Voice works great when calling another T-Mobile VoLTE phone (HD icon appears and voice quality/audio range is noticeably improved).
Not to state the obvious, but have those of you with VoLTE issues go into the hidden "testing" menu and made sure the VoLTE Provisioning Flag was set to "ON"? Access the Testing menu by entering these keys from the dialpad: *#*#4636#*#* and go under Phone Information then scroll down...
Also, make sure you have the T-Mobile LTE APN (Access Point Name) configured and enabled (should be auto-provisioned as "T-Mobile US 260 LTE" but if not the APN is "fast.t-mobile.com" and there are instructions for manually configuring their APN on their website).
Hope this helps.

ech1253 said:
I don't want to jinx myself but I have had my XT1575 (US) since October but recently switched to T-Mobile from VZ. Although my bootloader is still unlocked, I am running stock 6.0 (24.201.3 - Feb Security Update) and have had zero VoLTE issues (even on VZ it worked fine once enabled on my account)... Still no Wifi-Calling (on either carrier) with my XT1575, but HD Voice works great when calling another T-Mobile VoLTE phone (HD icon appears and voice quality/audio range is noticeably improved).
Not to state the obvious, but have those of you with VoLTE issues go into the hidden "testing" menu and made sure the VoLTE Provisioning Flag was set to "ON"? Access the Testing menu by entering these keys from the dialpad: *#*#4636#*#* and go under Phone Information then scroll down...
Also, make sure you have the T-Mobile LTE APN (Access Point Name) configured and enabled (should be auto-provisioned as "T-Mobile US 260 LTE" but if not the APN is "fast.t-mobile.com" and there are instructions for manually configuring their APN on their website).
Hope this helps.
Click to expand...
Click to collapse
VOLTE Provisioned flag is set. APN is correct.

Tinkerer_ said:
Last I saw, it appeared that OTA Marshmallow 6.0 on Moto X Pure Edition had voice call problems with VoLTE enabled, on T-Mobile.
The workaround was to disable VoLTE (Disable "Enhanced LTE"), to maintain good voice calls quality.
Can anyone offer info on whether this is still a problem with OTA MM, T-Mobile, and VoLTE?
I'm staying with 5.1.1 until I see this resolved, either on T-Mobile end, MM, or maybe with a fix to some offending component or app.
TIA...
Click to expand...
Click to collapse
It really doesn't matter if you upgrade the phone from Lollipop because VoLTE didn't exist on the phone until the Marshmallow upgrade. If you have problems with calls you can turn VoLTE off which is what you have now.

heap1 said:
It really doesn't matter if you upgrade the phone from Lollipop because VoLTE didn't exist on the phone until the Marshmallow upgrade. If you have problems with calls you can turn VoLTE off which is what you have now.
Click to expand...
Click to collapse
It does if we want to make calls on LTE band 12 as this band only supports VOLTE for voice.

kevev said:
It does if we want to make calls on LTE band 12 as this band only supports VOLTE for voice.
Click to expand...
Click to collapse
I think you misunderstood what I said. VoLTE was not added to the phone until the Marshmallow upgrade. If you are still using Lollipop VoLTE doesn't exist.

ech1253 said:
I don't want to jinx myself but I have had my XT1575 (US) since October but recently switched to T-Mobile from VZ. Although my bootloader is still unlocked, I am running stock 6.0 (24.201.3 - Feb Security Update) and have had zero VoLTE issues (even on VZ it worked fine once enabled on my account)... Still no Wifi-Calling (on either carrier) with my XT1575, but HD Voice works great when calling another T-Mobile VoLTE phone (HD icon appears and voice quality/audio range is noticeably improved).
Not to state the obvious, but have those of you with VoLTE issues go into the hidden "testing" menu and made sure the VoLTE Provisioning Flag was set to "ON"? Access the Testing menu by entering these keys from the dialpad: *#*#4636#*#* and go under Phone Information then scroll down...
Also, make sure you have the T-Mobile LTE APN (Access Point Name) configured and enabled (should be auto-provisioned as "T-Mobile US 260 LTE" but if not the APN is "fast.t-mobile.com" and there are instructions for manually configuring their APN on their website).
Hope this helps.
Click to expand...
Click to collapse
Your move from VZ to T-Mobile may support it is a carrier thing. Perhaps because your phone was already provisioned to with VOLTE on VZ, it carried over. I know the phone supports it, but let's face it, U.S. Carriers seem to hate not having control (especially AT&T). Any means to keep features limited unless you use their branded devices is one more control they have.
Sent from my XT1575 using XDA-Developers mobile app

heap1 said:
I think you misunderstood what I said. VoLTE was not added to the phone until the Marshmallow upgrade. If you are still using Lollipop VoLTE doesn't exist.
Click to expand...
Click to collapse
I understood what you said. But band 12 opens up a larger coverage area. Without VOLTE calls do not work on band 12.
One thing to note is that if the screen is kept on the jitter goes away. So it may also be a power management issue. We have already tried disabling power management on call services. But it did not help.

kevev said:
I understood what you said. But band 12 opens up a larger coverage area. Without VOLTE calls do not work on band 12.
One thing to note is that if the screen is kept on the jitter goes away. So it may also be a power management issue. We have already tried disabling power management on call services. But it did not help.
Click to expand...
Click to collapse
I am not disputing the fact that you need VoLTE to make calls over Band 12. Fortunately where I live in the Boston area T-Mobile pretty much operates exclusively on Band 4. So if I start having call problems with VoLTE enabled I can just turn it off. However, if I was still on Lollipop and in areas of the Country that use Band 12 exclusively I would not be able to make any cell calls using T-Mobile, since VoLTE was not enabled on the phone until the Marshmallow upgrade.
I would like to be able to blame T-Mobile for the problem but unfortunately this doesn't seem to be the case. Other third party phones like the recent Nexus phones, the Axon Pro, and the iPhone 6s and 6s plus all seem to have no problems making voice calls with VoLTE enabled. In my case I have noticed that the static problem does not occur with every call. It seems to come and go on an intermittent basis.

heap1 said:
I am not disputing the fact that you need VoLTE to make calls over Band 12. Fortunately where I live in the Boston area T-Mobile pretty much operates exclusively on Band 4. So if I start having call problems with VoLTE enabled I can just turn it off. However, if I was still on Lollipop and in areas of the Country that use Band 12 exclusively I would not be able to make any cell calls using T-Mobile, since VoLTE was not enabled on the phone until the Marshmallow upgrade.
I would like to be able to blame T-Mobile for the problem but unfortunately this doesn't seem to be the case. Other third party phones like the recent Nexus phones, the Axon Pro, and the iPhone 6s and 6s plus all seem to have no problems making voice calls with VoLTE enabled. In my case I have noticed that the static problem does not occur with every call. It seems to come and go on an intermittent basis.
Click to expand...
Click to collapse
I agree that it seems to be device specific. It sucks that Moto is ignoring the issue.
Sent from my XT1575 using XDA-Developers mobile app

kevev said:
I agree that it seems to be device specific. It sucks that Moto is ignoring the issue.
Sent from my XT1575 using XDA-Developers mobile app
Click to expand...
Click to collapse
I think we all agree that Moto ignoring the issue is the worst part of the situation. I don't think they have even acknowledged it as a problem yet. There are a lot of things about the phone I like. However, at this point I would never buy another phone from Motorola. All phones have minor bugs. However, this is a major problem.

WiFi calling - Three UK

I am on Android 7.0. See software specs in attached screenshot. Three UK turned on wifi called end of January. My phone is unlocked and bought from Samsung. I don't seem to have the WiFi calling option. I have already checked that you don't need a phone bought from three, it will work with any s7 Edge.
Anyone have wifi calling working with any network on a non carrier phone? I don't see any options for it anywhere either.

Launch the phone app (I.e. The green phone icon), tap the settings option on the top right. For me it's an option just under vibrate.
I'm on EE with a phone that came direct from Samsung.

mmotti said:
Launch the phone app (I.e. The green phone icon), tap the settings option on the top right. For me it's an option just under vibrate.
I'm on EE with a phone that came direct from Samsung.
Click to expand...
Click to collapse
I looked there. It doesn't exist on mine.... Are you on the same build version?

n1r0k said:
I looked there. It doesn't exist on mine.... Are you on the same build version?
Click to expand...
Click to collapse
You should see what CSC/PDA the stock Three UK S7 Edge comes with, I think it is this one https://samsung-firmware.org/download/Galaxy S7/81c4/HTS/G930FXXU1DQB7/G930FHTS1DQA4/ but you should confirm. Then flash it with Odin. It won't trip Knox or anything. You can find out how to do that here on XDA.

mmotti said:
Launch the phone app (I.e. The green phone icon), tap the settings option on the top right. For me it's an option just under vibrate.
I'm on EE with a phone that came direct from Samsung.
Click to expand...
Click to collapse
fguerra024 said:
You should see what CSC/PDA the stock Three UK S7 Edge comes with, I think it is this one https://samsung-firmware.org/download/Galaxy S7/81c4/HTS/G930FXXU1DQB7/G930FHTS1DQA4/ but you should confirm. Then flash it with Odin. It won't trip Knox or anything. You can find out how to do that here on XDA.
Click to expand...
Click to collapse
I did confirm with three today and have found it elsewhere on the Internet that it doesn't need three own branded firmware. So I don't really want to install it. I was part of the 7.0 beta, I wonder if that has caused issues.

Yes I'm on the same build version. I was also on the 7 beta and the only difficulty I had was locating the WiFi calling option as it used to be located through the main settings.
Do you have to opt in for WiFi calling on Three? I think I may have with EE.

mmotti said:
Yes I'm on the same build version. I was also on the 7 beta and the only difficulty I had was locating the WiFi calling option as it used to be located through the main settings.
Do you have to opt in for WiFi calling on Three? I think I may have with EE.
Click to expand...
Click to collapse
On the three website it says you just sneed a Compatible phone and the latest update. That's it. I also spoke to three who Confirmed this and then went on to say I should Contact Samsung......

Any joy with three wi fi calling s7 edge
I have updated my unlocked s7 edge as suggested by three, but no wi fi calling available, I have to walk to end of road on holiday cottage could do with a fix. Three in touch no longer works either. Did you get a solution from Samsung?

Wi-Fi Calling works only on H3G Firmware
After few nights of flashing various CSC ROMs, I can confirm that Wi-Fi calling and HD Calling on Three UK appears on H3G firmware only and it works like it should.
Here are few notes after flashing:
XEU - No Wi-Fi calling option, VoLTE icon intermittent, dropping calls after few min if started calling on 4G, keeps switching back to 3G to initiate a voice call.
BTU - No Wi-Fi Calling option, VoLTE icon appears and seems OK when calling over 4G, however no HD voice.
H3G - Wi-Fi Calling option appears in Call Settings and it works! However no VoLTE icon but for sure it makes voice calls over 4G as it initiate a voice call much faster and the radio doesn't switch back to 3G, also the HD icon appears when making a phone call to compatible service number or another phone which supports HD voice - call is sharp crystal clear like on Skype or Messenger etc.
Conclusion: To get all stuff enabled Wi-Fi Calling + VoLTE + HD Voice you need to get your phone directly from Three or flash H3G firmware to your current phone.
H3G firmware luckily hasn't got too much of a bloatware, it can be easily uninstalled or disabled :laugh:
Please hit thumbs up for me :good:

r.ciesla said:
After few nights of flashing various CSC ROMs, I can confirm that Wi-Fi calling and HD Calling on Three UK appears on H3G firmware only and it works like it should.
Here are few notes after flashing:
XEU - No Wi-Fi calling option, VoLTE icon intermittent, dropping calls after few min if started calling on 4G, keeps switching back to 3G to initiate a voice call.
BTU - No Wi-Fi Calling option, VoLTE icon appears and seems OK when calling over 4G, however no HD voice.
H3G - Wi-Fi Calling option appears in Call Settings and it works! However no VoLTE icon but for sure it makes voice calls over 4G as it initiate a voice call much faster and the radio doesn't switch back to 3G, also the HD icon appears when making a phone call to compatible service number or another phone which supports HD voice - call is sharp crystal clear like on Skype or Messenger etc.
Conclusion: To get all stuff enabled Wi-Fi Calling + VoLTE + HD Voice you need to get your phone directly from Three or flash H3G firmware to your current phone.
H3G firmware luckily hasn't got too much of a bloatware, it can be easily uninstalled or disabled :laugh:
Please hit thumbs up for me :good:
Click to expand...
Click to collapse
I found exactly the same when I tested roms, you need the network rom to get wificalling.

I know this is an old thread but still relevant today.
I found pretty much the same thing. WiFi Calling and VoLTE on EE needs the EVR firmware (but I think it may work on BTU as well with Android 8)
3 does require the HG3 firmware
Without the correct match of firmware the option to enable WFC does not appear in phone/settings.
Others like O2 and Voda probably require their own firmware as well.
But what is really weird is if you get for example, an iPhone 6S and put a 3 card in it...WFC just works and the same with EE. No special firmware. Maybe Apple know something we don't

Do you see the WiFI Calling option in Phone Settings with Three / H3G UK firmware on a phone that works with WiFi calling? I can't see any reference to that option on the Three help pages. If so, any chance of a screenshot?
Thanks

I am in similar situation with S7 Edge which currently doesn't have an option for wifi calling. I moved from O2 to Three recently. O2 wifi calling worked and the option was there. It doesn't have the option on Three.
Does anybody know which firmware to flash which will enable this option? I've downloaded both the BTU version and H3G version for the UK. Can anyone please confirm if either of these will enable wifi calling option?
Many Thanks.

AndyH747 said:
I am in similar situation with S7 Edge which currently doesn't have an option for wifi calling. I moved from O2 to Three recently. O2 wifi calling worked and the option was there. It doesn't have the option on Three.
Does anybody know which firmware to flash which will enable this option? I've downloaded both the BTU version and H3G version for the UK. Can anyone please confirm if either of these will enable wifi calling option?
Many Thanks.
Click to expand...
Click to collapse
I think you have a better chance with the Three firmware, but AFAIK, the issue is that Android phones are coded to a carrier. This doesn't seem to matter with VOLTE but for some reason VOWiFi is an issue. If anyone knows how to get around this, I'd be happy to know too.

cancunia said:
I think you have a better chance with the Three firmware, but AFAIK, the issue is that Android phones are coded to a carrier. This doesn't seem to matter with VOLTE but for some reason VOWiFi is an issue. If anyone knows how to get around this, I'd be happy to know too.
Click to expand...
Click to collapse
Thanks for the reply. I thought the Three firmware would be better but I was hoping someone has tried this and actually got it working. Seems odd that the phones sold direct by Three have this by default but it seems almost impossible to enable if the phone was bought elsewhere. That's why I'm wondering if the H3G firmware I found on Sammobile.com has the feature or not.

AndyH747 said:
Thanks for the reply. I thought the Three firmware would be better but I was hoping someone has tried this and actually got it working. Seems odd that the phones sold direct by Three have this by default but it seems almost impossible to enable if the phone was bought elsewhere. That's why I'm wondering if the H3G firmware I found on Sammobile.com has the feature or not.
Click to expand...
Click to collapse
Some posts earlier in this thread say they have WiFi calling working after flashing the Three firmware. This does not work on my LG G5, but you may be luckier with a Samsung phone.

r.ciesla said:
Wi-Fi Calling works only on H3G Firmware
After few nights of flashing various CSC ROMs, I can confirm that Wi-Fi calling and HD Calling on Three UK appears on H3G firmware only and it works like it should.
Here are few notes after flashing:
XEU - No Wi-Fi calling option, VoLTE icon intermittent, dropping calls after few min if started calling on 4G, keeps switching back to 3G to initiate a voice call.
BTU - No Wi-Fi Calling option, VoLTE icon appears and seems OK when calling over 4G, however no HD voice.
H3G - Wi-Fi Calling option appears in Call Settings and it works! However no VoLTE icon but for sure it makes voice calls over 4G as it initiate a voice call much faster and the radio doesn't switch back to 3G, also the HD icon appears when making a phone call to compatible service number or another phone which supports HD voice - call is sharp crystal clear like on Skype or Messenger etc.
Conclusion: To get all stuff enabled Wi-Fi Calling + VoLTE + HD Voice you need to get your phone directly from Three or flash H3G firmware to your current phone.
H3G firmware luckily hasn't got too much of a bloatware, it can be easily uninstalled or disabled :laugh:
Please hit thumbs up for me :good:
Click to expand...
Click to collapse
I have a couple of Samsung Galaxy S7 edge duos dual-SIM phones in which I have SIMs from different network operators or MVNOs. One is usually a Three PAYG SIM and the other is a Virgin Mobile (now VMO2) contract SIM or other MVNO PAYG SIM.
I am in a poor signal area for all of the networks despite being in a built-up urban area of Aylesbury. I currently rely on a Home Signal unit from Three to cover that network but would prefer to use Wi-Fi Calling for all networks.
What do I do about the secondary network?
Which ROM firmware should I be using?
Why doesn't all firmware enable Wi-Fi Calling and VoLTE for any network?
Ofcom have banned phones being locked to a network from December 2021 but the ban does not seem to cover these issues which are tantamount to locking a device to a network.
Ofcom needs to address these issues before the end of 2021 when some networks will have withdrawn support for their Home Signal type equipment and even 3G fallback for voice calls in 4G/5G coverage areas.

VOLTE Wifi Calling with Unlocked S10+

Hey there, I've been doing a bit of research but it has been a long while since i have done any flashing of firmware etc. I received my s10+ device today. Model number is SM-G975UZKAXAA. I am a Verizon wireless customer. When I placed this device on my account I noticed I have no access to Voice over LTE, and I also do not have any access to Wifi Calling. My question is the following. I read somewhere a couple of weeks ago that if I wanted something like this I would need to flash the original VZW Firmware which would have all the lovely bloatware etc on the device. Is there any way I can do that? I have seen firmware that has been posted but I dont seem to see anything that specifically is the VZW apps etc which should (hopefully allow VOLTE and Wifi Calling and maybe even HD Calling, if thats a thing)
I would appreciate any info anyone can provide me on this, as the only solution I can see at the moment is to return the device and start over with a VZW specific device.
Cheers~

Likewise but with a T-Mobile firmware for me

Unlocked US version here with Verizon and wifi calling and volte working out of the box.
You may want to call Verizon to see if they need to provision it for your account.
Sent from my SM-G975U1 using Tapatalk

clubtech said:
Unlocked US version here with Verizon and wifi calling and volte working out of the box.
You may want to call Verizon to see if they need to provision it for your account.
Sent from my SM-G975U1 using Tapatalk
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Same here!! Really happy about it too as my unlocked Note 9 did not work.
Sent from my SM-G975U1 using Tapatalk

clubtech said:
Unlocked US version here with Verizon and wifi calling and volte working out of the box.
You may want to call Verizon to see if they need to provision it for your account.
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Click to collapse
skinnytoo2 said:
Same here!! Really happy about it too as my unlocked Note 9 did not work.
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Hey guys, just wanted to check in with you (or anyone else who has wifi calling on unlocked Verizon). It is 100% working? It's the only reason I got the carrier version. Should I cancel and order the unlocked?

AB_ said:
Hey guys, just wanted to check in with you (or anyone else who has wifi calling on unlocked Verizon). It is 100% working? It's the only reason I got the carrier version. Should I cancel and order the unlocked?
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Yes, it works with my unlocked S10+ on Verizon. It surprised the heck out of me as I too have the unlocked Note9, but no wifi calling.

What about on AT&T? Can anyone say if they can at least get VOLTE? WiFi calling would be the icing on the cake. Thank you

lyall29 said:
What about on AT&T? Can anyone say if they can at least get VOLTE? WiFi calling would be the icing on the cake. Thank you
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And T-Mobile?

dchurch85 said:
And T-Mobile?
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Wifi calling worked on my unlocked S10 out of the box on T-Mobile. I'll try and check on VoLTE later but I get **** reception near work.

Can you explain how you enabled WiFi calling on unlocked version, on Verizon? I can't find a way to do it. What about HD Voice? My real problem is that data does not work while on a call, using my unlocked, on Verizon. Is there a way to get that working?

I have unlocked S10+ on VZW. I get LTE+ which is VoLTE, data works while on a call.
Sent from my SM-G975U1 using Tapatalk

Warwizard said:
Hey there, I've been doing a bit of research but it has been a long while since i have done any flashing of firmware etc. I received my s10+ device today. Model number is SM-G975UZKAXAA. I am a Verizon wireless customer. When I placed this device on my account I noticed I have no access to Voice over LTE, and I also do not have any access to Wifi Calling. My question is the following. I read somewhere a couple of weeks ago that if I wanted something like this I would need to flash the original VZW Firmware which would have all the lovely bloatware etc on the device. Is there any way I can do that? I have seen firmware that has been posted but I dont seem to see anything that specifically is the VZW apps etc which should (hopefully allow VOLTE and Wifi Calling and maybe even HD Calling, if thats a thing)
I would appreciate any info anyone can provide me on this, as the only solution I can see at the moment is to return the device and start over with a VZW specific device.
Cheers~
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Click to collapse
Unlocked S10e on T-Mobile. WiFi Calling, VoLTE and band 12 are working. There is no setting for VoLTE, but it works

Jeremyinsf said:
Can you explain how you enabled WiFi calling on unlocked version, on Verizon? I can't find a way to do it. What about HD Voice? My real problem is that data does not work while on a call, using my unlocked, on Verizon. Is there a way to get that working?
Click to expand...
Click to collapse
For WiFi calling on Unlocked:
Open Dialer
Click 3 dots
Settings
Hit the slider for Wi-Fi Calling to enable.

dchurch85 said:
And T-Mobile?
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WiFi calling and volte works ?

skinnytoo2 said:
I have unlocked S10+ on VZW. I get LTE+ which is VoLTE, data works while on a call.
Sent from my SM-G975U1 using Tapatalk
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I don't think that is right. LTE+ and VoLTE are different things. As well as data while on a call.
VoLTE means your call is being transmitted over LTE. I'm pretty sure you can use data while on a call WITHOUT VoLTE.
---------- Post added at 03:33 AM ---------- Previous post was at 03:30 AM ----------
Shuthefrontdoor said:
WiFi calling and volte works
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How do you test if VoLTE is working? Do you get an Icon for it?
I tested WiFi calling by going into airplane mode, turning Wifi on, and making a call and it worked. But didn't get a special icon for it.

For those basing your decision to buy unlocked/international vs branded, be warned. I can only speak for Att, but I spent about 2 hours arguing with their level 2 tech department and here's what I have learned. If you have a sim that is provisioned on a branded phone and then put the sim into an unlocked/international phone, you will be able to use volte, wi-fi calling, etc., but only until the carrier pings your imei for a periodical check, once that happens, those features disappear. Also, on Android Pie, the Enhanced LTE Services tab under Mobile Data has been removed as it is turned on by default, also confirmed with ATT. The only way to manually check is to toggle wifi calling on and see if it works. Anyway, just trying to help as I have gone to a branded phone for the first time in 6 years because the reception and enhanced features are more important than rooting to me.

I was able to get wifi and volte working on my unlocked s10 by putting sim into verizon phone, letting network recognize it, enabling advanced calling and such on that device and then taking the sim out and putting it back in my new unlocked s10. The option for volte appears in settings-connections-mobile networks.

VoLTE works on tmobile, not that anyone should be surprised. That has been the case for the S8 thru N9. Now... I noticed that Samsung removed the VoLTE toggle from settings.

Ace42 said:
VoLTE works on tmobile, not that anyone should be surprised. That has been the case for the S8 thru N9. Now... I noticed that Samsung removed the VoLTE toggle from settings.
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Correct, no VoLTE setting on my unlocked S10e, but it is on by default it seems

samappz said:
I was able to get wifi and volte working on my unlocked s10 by putting sim into verizon phone, letting network recognize it, enabling advanced calling and such on that device and then taking the sim out and putting it back in my new unlocked s10. The option for volte appears in settings-connections-mobile networks.
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Click to collapse
Using what I learned in this thread, I called Verizon and talked to Level2 support. They tried to get everything working and could not - but this was when I had the new SIM installed, provided by Samsung when I got my S10+.
So because others here spoke of their 'other' SIM, I suggested we try that - so I plugged in the SIM from my S8 and asked them to reprovision everything. They did... and....Now everything that didn't work ... WORKS.
So I have an Unlocked S10+ on Verizon that has (among other things):
- Wifi Calling
- Real Time Text
- VoLTE ("HD Voice") (Which means data now works while I'm on a phone call)
- Visual Voicemail
So it seems the Samsung SIM was part of the problem, and they are reporting this to Samsung. The tech support person told me others have reported similar issues and they will get with Samsung to figure out what the issue is.
Hopefully this helps some others as well!

Phone operator not supporting wifi call. Can I unlock it?

Hi, so I know you can enable wifi calls on your Redmi note 7 phone, but that doesn't mean wifi call will work. I believe phone operators needs to support your phone for this. I use "Onecall" which is based in Norway. They only support iPhone's, Samsung phones, and a few huawei phones.
Is it still possible to make this work? I really do need wifi call, and now I'm considering getting a phone that truly supports this feature in Norway.

I think it's an IMEI based feature,for example here in Italy with Vodafone just some devices can use VoLTE and some of them needs to be sold by Vodafone with a branded software, so the VoLTE will work only on that IMEI, i don't know how your carrier work but i think it's something like that.

Kiicki said:
Hi, so I know you can enable wifi calls on your Redmi note 7 phone, but that doesn't mean wifi call will work. I believe phone operators needs to support your phone for this. I use "Onecall" which is based in Norway. They only support iPhone's, Samsung phones, and a few huawei phones.
Is it still possible to make this work? I really do need wifi call, and now I'm considering getting a phone that truly supports this feature in Norway.
Click to expand...
Click to collapse
Test this
VoLTE *#*#86583#*#*
WiFi Calling *#*#869434#*#*
Sent from my Mi Note 10 using XDA Labs

joke19 said:
Test this
VoLTE *#*#86583#*#*
WiFi Calling *#*#869434#*#*
Sent from my Mi Note 10 using XDA Labs
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Those commands is just so that VOLTE or Wifi calling will appear in the settings which I have already done. I have also enabled it of course, but still not working.

Kiicki said:
Those commands is just so that VOLTE or Wifi calling will appear in the settings which I have already done. I have also enabled it of course, but still not working.
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Click to collapse
You need to have the volte service enabled by phone operator for your sim card. If working for some phones (ex. Samsung) it's like my operator (Digi EU), it's enabled automatically for some IMEI types. If you can, try to keep your sim in a supported phone, or try to ask the operator to enable the volte service.
This way you can make the volte working, for the vowifi... if you are lucky, your Redmi Note 7 have a working vowifi modem config for your operator... I needed to change the modem profile using the Qualcomm PDC tool...** https://forum.xda-developers.com/showpost.php?p=83310915&postcount=26