topic Re: VoLTE / 4G calling not available (Sony Xperia 1ii) in Android

VoLTE / 4G calling not available (Sony Xperia 1ii)

line-wait — Thu, 07 Nov 2024 15:23:27 GMT

I recently joined O2 from Three, because Three are turning off their 3g network and I stopped being able to make any calls. I have a Sony Xperia 1ii which I believe is capable of 4G calling but this did not work on Three's network. Three has no 2G to fall back on.

On O2 I can use my phone again, because O2 are yet to turn off 3G. However, I would like to know that my phone still will, once this happens.

There are no options in my phone settings that allow me to enable/disable 4G calling.

I just spoke to O2's technical support. They told me to look through the settings which (as I already knew) revealed there was nothing I could turn on or off.

The advisor then asked me if I could access mobile internet whilst on the call with him. I could. He said this meant that my phone was already using 4G calling. I pointed out that while on the call, the symbol in the top menu bar is "H+" not 4G, suggesting the call was going through an H+ connection not a 4G one.

He assured me that no, that doesn't matter; if I can use mobile internet whilst on a call, this means my phone is using 4G calling. I was sceptical but said ok and ended the call.

However ... if I change my "Preferred network type" to "4G/5G" I am unable to make any calls.

Does this not confirm that I'm correct - my phone is not making 4G calls?

(I have tried doing the *#*#4636#*#* code and there is a switch next to "VoLTE provisioned" but it's turned off and greyed out.)

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

Enlli — Thu, 07 Nov 2024 15:50:33 GMT

Have you moved to O2 Contract or one of their PAYG offerings?

If PAYG there is no 4G calling

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

line-wait — Thu, 07 Nov 2024 15:53:06 GMT

I was initially on PAYG but have now moved to a monthly contract.

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

Enlli — Thu, 07 Nov 2024 15:57:56 GMT

Should have VoLTE available then as it's now supposed to be on by default on new contracts.

You may need to talk to O2

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

line-wait — Thu, 07 Nov 2024 16:23:37 GMT

As per my first post ... I have already spoken to O2, who told me it's already working on my phone.

But I don't think it is, hence my question about whether I'm right to think it's not working.

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

MI5 — Thu, 07 Nov 2024 16:55:16 GMT

You are correct @line-wait

It isn't working.

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

Enlli — Thu, 07 Nov 2024 17:02:31 GMT

Interesting you left Three as 3G closed and you could not make calls and yet Three supports VoLTE on both PAYG

and Contract

Now you are with O2 calls are dropping to 3G when calling

Seems there may be another problem here, possibly the handset but hard to say at a distance

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

line-wait — Thu, 07 Nov 2024 17:12:12 GMT

Thanks @MI5 .

@Enllithat's right - VoLTE didn't work on Three either (even though the handset is a 4g/5g one).

From what I understand, VoLTE has to be enabled at the provider end as well as on the handset.

My handset, the Sony Xperia 1ii is one that was sold by O2 (even though that's not where I originally bought mine).

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

MI5 — Thu, 07 Nov 2024 17:18:02 GMT

@line-wait

O2 tell us that 4g and wifi calling is on by default now for all supported phones and contracts.

Check your firmware is fully up to date, but the age of the phone might be the issue.

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

Enlli — Thu, 07 Nov 2024 17:33:25 GMT

As stated by @MI5 VoLTE should be on by default. It should also have been on by default on Three. As the phone has worked on neither I suspect handset/ Firmware problem.

Is it possible to put the SIM in a from a borrowed phone that has VoLTE and see what happens.

It might also be useful to put your SIM in the borrowed phone

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

japitts — Thu, 07 Nov 2024 18:13:20 GMT

@line-wait wrote:

The advisor then asked me if I could access mobile internet whilst on the call with him. I could. He said this meant that my phone was already using 4G calling. I pointed out that while on the call, the symbol in the top menu bar is "H+" not 4G, suggesting the call was going through an H+ connection not a 4G one.

H & H+ are 3G indicators.

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

madasaf1sh — Thu, 07 Nov 2024 19:27:22 GMT

This is all linked to the Sony firmware flashed onto the phone for Three, which seems to have disabled VoLTE..

Not sure if this is you @line-wait asking on the Three community, but they seem to confirm it.. https://community.three.co.uk/t5/Devices/Xperia-1-ii-not-making-it-recieving-calls/m-p/38256

I would contact Sony to be honest, and see what they can advise.. There may be ways to flash a none Three firmware onto the phone at your own risk, and you will need to completely wipe the phone..

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

MI5 — Thu, 07 Nov 2024 19:40:51 GMT

But it's an O2 phone.....

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

madasaf1sh — Thu, 07 Nov 2024 19:43:07 GMT

The Op says he joined from 3 with the same handset which didn't work on 3 with VOLTE

@line-wait wrote:
I recently joined O2 from Three, because Three are turning off their 3g network and I stopped being able to make any calls. I have a Sony Xperia 1ii which I believe is capable of 4G calling but this did not work on Three's network. Three has no 2G to fall back on.

On O2 I can use my phone again, because O2 are yet to turn off 3G. However, I would like to know that my phone still will, once this happens.

There are no options in my phone settings that allow me to enable/disable 4G calling.

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

MI5 — Thu, 07 Nov 2024 19:47:06 GMT

My handset, the Sony Xperia 1ii is one that was sold by O2 (even though that's not where I originally bought mine).

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

Enlli — Thu, 07 Nov 2024 20:04:29 GMT

Customer could well mean it's a model sold by O2

Phrasing is ambiguous

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

madasaf1sh — Thu, 07 Nov 2024 20:10:30 GMT

To me that's not an o2 supplied handset and the handset is from 2020 it would be one that needs specific firmware at the time across all networks...

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

MI5 — Thu, 07 Nov 2024 20:19:45 GMT

I've already stated the age could be an issue but having checked it was a supported device on O2 without the need for specific O2 firmware.

No * next to device.

Wifi and 4G Calling device list

Wifi and 4G Calling is currently available on the following devices:

iPhone SE 2020, 11, 11 Pro, 11Pro Max, iPhone Xs, iPhone Xs Max, iPhone X, iPhone Xr, iPhone 8 Plus, 8, 7 Plus, 7, 6s Plus, 6s, 6 Plus, 6, SE
Samsung Galaxy Note20 Ultra 5G, Galaxy Note20 5G, Galaxy Note20 4G, Galaxy Z Flip 5G, Galaxy Z Fold2 5G, Xcover Pro, A21s, A41, A51, A51 5G, A71, S10 Lite, Galaxy Fold 5G, Galaxy Z Flip, S20, S20 Plus, S20 Ultra, S10 5G, Note10, Note10 Plus 5G, S10, S10e, S10 Plus, S9, S9 Plus, S8, S8 Plus, Note8, S7*, S7 edge* and J3 2017*, A10, A20e, A50, A70, A8, A3 2017, A6, J6, J5 (2017), A5 (2017), Note9, A7, J6+, J4+, A9, A90 5G, A40, Xcover 4S.
Sony Xperia 5 II, Xperia L4, Xperia XZ2, Xperia XZ3, XZ2 Compact, XZ Premium*, Xperia XA2, Xperia XZ1*, Xperia XZ1 Compact*, Xperia 10, Xperia L3, Xperia 5, Xperia 1, Xperia 10 II and Xperia 1 II
Oneplus 5, 5T, 6, 6T
HTC U11*
Doro 8035*

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

jonsie — Thu, 07 Nov 2024 20:22:20 GMT

This could run and run

Re: VoLTE / 4G calling not available (Sony Xperia 1ii)

line-wait — Thu, 07 Nov 2024 22:50:42 GMT

Yup sorry, my wording was unclear.

I meant that this phone model is one that was, in the past, sold by O2.

I bought mine second hand a few years ago - it never had Three specific firmware on it (as far as I know). I suspect that it might originally have been sold by O2 because I remember it still had an O2 splash screen when I first got it. It would have been sold as "unlocked". I imagine I did a factory reset at some point after getting it.