Database Users

Can only connect to LTE and cannot make calls

I have a weird problem with a new SM-G935F (Exynos), which I'm trying to use in Serbia (Telenor), while it's branded for TIM Italy carrier. The device connects to LTE network instantly, but I'm unable to make calls, and messages are received only intermittently - data works properly all the time. When I try to connect to 2G or 3G only, phone cannot register to network at all. I tried flashing multiple modems both for 6.0.1 and 7.0 and tried multiple stock ROMs, after, of course, trying everything with a pristine initial setup...I tested the SIM card in another phone and it works normally. I can't test another nano SIM card with the phone at the moment...Can it be something with the CSC, since that is the only part that I didn't touch? Or is it most likely a hardware problem?
Thank you very much!

I have same problem on a 935f! Up

Sprov said:
I have same problem on a 935f! Up
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Click to collapse
Hi Sprov,
I see you're from Italy - is your phone also bought from TIM?

It has everything to do with the csc!!
Telenor might be using VoLTE technology to make voice/video calls. Since Serbia isn't in UK, BTU firmware has its own standards and isn't compatible with your region. Same issue for me here. Reverting back to 6.0.1 will gain me back calls feature. Until an official update is released in your region, you will have to compromise this one feature(well the most important one). If you very much want the feature, the only way right now is to revert back to old firmware(including the csc)

Thanks a lot for the insight! But should that affect ability to connect to network when it's set to 2G/3G only? Since the phone doesn't register at all, only to LTE. Thanks again!

This has even happen to me. I was a beta tester to. Recently I added a carrier for my sim 2 which supports VoLTE. When I flashed BTU official yesterday via OTA there was no VoLTE and finally came to know that BTU CSC doesn't provides VoLTE. Since its an unbranded firmware. Reverted back to my CSC MM. Got back VoLTE also.
Waiting for an INS version of Nougat.
Sent from my SM-G935F using Tapatalk

It turns out that, in my case, very weird, it was due to SIM card...It worked normally on all modes in 2 other phones, but in this phone only LTE as I stated. Once I put in a new SIM card, same carrier and everything, no problem at all.
I understand the problem with calls and VoLTE, but in this case the weirdest was that it connected to LTE at all, while it couldn't register to network on 2G/3G.

protech_v2 said:
Hi Sprov,
I see you're from Italy - is your phone also bought from TIM?
Click to expand...
Click to collapse
I had it for free, a friend who couldn't stand the problem gave me, though he bought it from someone, not store. Imei is ok.
If i switch from h3g to TIM, so using roaming, i have 2g internet and working connection. Weird.
---------- Post added at 10:13 PM ---------- Previous post was at 10:10 PM ----------
protech_v2 said:
Hi Sprov,
I see you're from Italy - is your phone also bought from TIM?
Click to expand...
Click to collapse
Sprov said:
I had it for free, a friend who couldn't stand the problem gave me, though he bought it from someone, not store. Imei is ok.
If i switch from h3g to TIM, so using roaming, i have 2g internet and working connection. Weird.
Click to expand...
Click to collapse
Oh and i have another s7edge which is my main device, i tested also tim sim and wind on both, i have same behavior of 2g/3g/4g. 4g is really unstable too than in my personal s7e. All tested in same condition with live sim switching

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.

Wifi calling on freedom mobile

Recently I got an S8 and I ported over my number to freedom from fido.
I thought the wifi is available on S8 but it is not.
Does anyone know when wifi calling would be available for S8?

The S8 supports VoLTE and WiFi calling, however it's upto the Carrier to enable the feature. I'm on Rogers, with my S8 I have WiFi calling and VoLTE working. However people who have unlocked S8's on Rogers won't get WiFi calling or VoLTE because Rogers blocks it on phones not purchased directly from Rogers.

Actually Rogers does not block any phone that it is not purchased from roger's itself.
I have been with Fido for 12 years and last year I got a brand new S7 edge from the Samsung store in Sherway Gardens.
The VoLTE and Wifi calling worked out of the box.
I called Fido and I wanted to make sure to register my new IMEI and the woman on the phone told me that the IMEI is automatically registered after few days
but just in any case she did regestered it.
I kept my Fido for few days before I port my number to Freedom and the S8 I got from Freedom worked in Fido (I unlocked it)
and the VoLTE and the wifi calling. Although what I did was to change the CSC. Then I changed the CSC back to Freedom and I did
not have the option for the wifi calling.
What I have noticed is that the phones that are sold in Canada (At least the major models ) are the same and the only difference is the CSC (network customization)
code that are come preloaded.
Now Freedom is a new to VoLTE and Wifi calling so I am waiting to enable the wifi calling in S8
gp-se said:
The S8 supports VoLTE and WiFi calling, however it's upto the Carrier to enable the feature. I'm on Rogers, with my S8 I have WiFi calling and VoLTE working. However people who have unlocked S8's on Rogers won't get WiFi calling or VoLTE because Rogers blocks it on phones not purchased directly from Rogers.
Click to expand...
Click to collapse

check this thread, Rogers will not support VoLTE and WiFi calling on phones NOT purchased directly from Rogers:
http://communityforums.rogers.com/t...-Phones-Not-Bought-in-Their-Store/td-p/397684

I don't know what the thread says but I can tell you that I have been with Fido for 12 years and last year I bought from Samsung Store a S7 and after few months an S7 edge
and on both phones VoLTE and wifi calling was working just fine.
I never had a single problem.
Also I called Fido representative and confirmed that both services were configured on my account with a problem
Also few days ago when I got my S8 from Freedom (I sim unlocked it) I put it on my Fido sim card
and VoLTE and Wifi were working again just fine
gp-se said:
check this thread, Rogers will not support VoLTE and WiFi calling on phones NOT purchased directly from Rogers:
http://communityforums.rogers.com/t...-Phones-Not-Bought-in-Their-Store/td-p/397684
Click to expand...
Click to collapse

VoLTE not available for Vodafone

Hi
From the time I bought this phone, I don't remember ever seeing VoLTE working on either of my SIMs (Vodafone and Telstra). Is there anyone else facing a similar issue. Any help will be appreciated. I am on Stock ROM with the latest update as of now of 26 October 2018.
P.S. VoLTE for both the carriers is available, I have checked with other devices and VOLTE works just fine on them.
Cheers

Which country?
-Edit-
I can c....Australia...

Cookie Ninja said:
Which country?
-Edit-
I can c....Australia...
Click to expand...
Click to collapse
Are you able to use VoLTE in Australia? I am in Australia

I am on Vodafone India and I have the same question. Here also Vodafone has VoLTE but the phone is not showing it. But on my phone's settings page there is an extra option "Enhanced 4G LTE Mode". I must add that even after enabling it, I am not getting VoLTE services. My phone has latest build, 334 (but this option was there even before)

Weird I'm also on Vodafone India and I seem to have no problems with Volte it has been working from the start, tho it keeps going to H sometimes and mobile data just doesn't work.

I m also using Vodafone in India but unfortunately Voote is not working although i have checked Enhanced 4g for Vodafone sim but still not available. I am on latest update 334.

Are you guys getting VoLTE in other devices because it is just this phone of mine in which VoLTE is not working either with Vodafone or Telstra. First I thought that it is just the issue with Vodafone but it is not working with Telstra either. I think that Asus has just implemented option for Enhanced Calling on Indian carriers.
Edit. I just updated to latest build but its still not working. I hope Asus adds VoLTE to global carriers as well.

VoLTE T-Mobile

Hello All, I've been trying to get VoLTE to at least show up on my unlocked S10+ and I am not successful. I flashed T-Mobile firmware and nothing also I called customer service to re-provision my SIM just in case and still didn't show up anywhere... I am missing something?

Hi
NICEGYPT said:
Hello All, I've been trying to get VoLTE to at least show up on my unlocked S10+ and I am not successful. I flashed T-Mobile firmware and nothing also I called customer service to re-provision my SIM just in case and still didn't show up anywhere... I am missing something?
Click to expand...
Click to collapse
Hi,
I called tmobile today to check on very same issue. They said it is on by default in tmobile phones????
Is there any way to check this??? There is nothing in settings about Volte on or off.
Ken

kenfb1 said:
Hi,
I called tmobile today to check on very same issue. They said it is on by default in tmobile phones????
Is there any way to check this??? There is nothing in settings about Volte on or off.
Ken
Click to expand...
Click to collapse
Yeah, most of the rep they have to give an answer somehow.. so it's just bs. there is nothing such as it's only on tmobile phones it was working on a vzw phone using tmobile sim... I actually flashed full firmware including datauser and still nothing...

The Unl XAA S10 works on VoLTE out of the box. I use T-mobile. Besides, xaa fw has supported VoLTE since S8. Now, there is no VoLTE indicator. Samsung removed it.