07-11-2024 15:23
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.)
Solved! Go to Solution.
20-11-2024 10:19 - edited 20-11-2024 10:22
20-11-2024 10:19 - edited 20-11-2024 10:22
So... the conclusion to this.
Sony support suggested that I should do a software repair on the phone.
I did this, and 4g calling (and wifi calling) is now available in my settings and seems to work on the O2 network.
So maybe the previous owner of the phone did something odd with the settings. And the advice given to me by O2 support was wrong: this phone is compatible.
07-11-2024 15:50
Have you moved to O2 Contract or one of their PAYG offerings?
If PAYG there is no 4G calling
07-11-2024 15:53
07-11-2024 15:53
I was initially on PAYG but have now moved to a monthly contract.
07-11-2024 15:57
07-11-2024 15:57
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
Guide: How to find help & contact O2
07-11-2024 16:23
07-11-2024 16:23
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.
07-11-2024 16:55
You are correct @line-wait
It isn't working.
07-11-2024 17:02
07-11-2024 17:02
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
07-11-2024 17:12
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).
07-11-2024 17:18
07-11-2024 17:18
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.
07-11-2024 17:31 - edited 07-11-2024 17:33
07-11-2024 17:31 - edited 07-11-2024 17:33
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