topic Re: Bad call quality Xperia Z5 Vodafone Operator in Z Series

Bad call quality Xperia Z5 Vodafone Operator

RobertoDS — Fri, 08 Jan 2016 10:54:12 GMT

Good morning

I've an Xperia Z5 with latest fw 32.0.A.6.200 and with operator Vodafone

Sometimes happens that calling my girl, with an Xperia Z3 with Vodafone, the call stars with a stellar quality, very high and really clear, cristallin sound, but sometimes, after one or two minutes, call quality becomes muffled, just as it could be closed in medium or high frequences, and we-together don't move any other settings or aren't on the move !

That's happening is very sad, because situation becomes very bad and differences are rapidly noted because at the first seconds call quality was really good and becomes bad, and together are hearing the same thing ...

What shall we or I do ?

In Settings-Call, I've only EQ, on Normal (prefering to Luminous), but are anymore available other settings just as it was on Z3 ?

Re: Bad call quality Xperia Z5 Vodafone Operator

Lord_viridis — Fri, 08 Jan 2016 16:15:52 GMT

It's because you have lost HD calling whilst on the call.
It's common in areas where 3g is sporadic or low bandwidth and sometimes the phone will roll back to 2g as it is a stronger signal.
Unfortunately HD voice isn't supported on 2g so you will notice this decrease in quality quite suddenly when it happens.
For the record tho, every phone I've had since Z3 has done this (including Samsungs and a HTC) since the HD audio for calls was rolled out with both Vodafone and O2.

Re: Bad call quality Xperia Z5 Vodafone Operator

RobertoDS — Sat, 09 Jan 2016 09:08:21 GMT

Thx for the reply

However I'm connected, usually, to wify, and 4g/3g's not connected to, but I'm on 4g(prefered)/3g/2g auto !

It's denoted by me and my girl with Z3 (3g*2g because hasn't 4g) !

What could it be ?

Re: Bad call quality Xperia Z5 Vodafone Operator

Lord_viridis — Sun, 10 Jan 2016 14:12:24 GMT

Even if you are on wifi, the network being used is still either 3g or 2g, in idle it will seek out the strongest signal (in your case 3g as the call starts HD audio) but in call it will change to seeking out the most steady (2g almost everywhere in UK) and eventually will drop down to 2g and lose HD audio.
It takes one party to drop down to 2g to lose HD so the only way to keep it is to set network to 3g only (network dependant as I'm on o2 and that is one of the network options) if you have that option then it will keep HD audio only if both parties remain on 3g.

Re: Bad call quality Xperia Z5 Vodafone Operator

RobertoDS — Tue, 12 Jan 2016 13:49:58 GMT

I've

Only WCDMA
Only GSM
WCDMA (Prefered)/GSM
4G (Prefered)/WCDMA/GSM

I can't do better than this ...

I clearly put my choice on 4g prefered because I'm paying for 4g so it's useless to let stay out of games.

So what Can I do ?

Re: Bad call quality Xperia Z5 Vodafone Operator

Lord_viridis — Tue, 12 Jan 2016 14:09:10 GMT

Only wcdma is 3g only.
Try that.
Both of you, then call.

Re: Bad call quality Xperia Z5 Vodafone Operator

RobertoDS — Tue, 12 Jan 2016 14:15:28 GMT

I'm paying for 4g so I can't, obviously, put 3g only but then with 3g only I can't do HD Audio, that's available only in 4G

However when I'm in 4G, call goes directly to 3g, and once I close the call, phone goes to 4g

Re: Bad call quality Xperia Z5 Vodafone Operator

Lord_viridis — Tue, 12 Jan 2016 14:17:08 GMT

HD audio is 3g, 4g is used only for data on Vodafone

Re: Bad call quality Xperia Z5 Vodafone Operator

Lord_viridis — Tue, 12 Jan 2016 14:19:08 GMT

Apologies 4g is also used for volte on voda but that is not the same as the 3g HD audio in calls, same result, different tech.

Re: Bad call quality Xperia Z5 Vodafone Operator

Lord_viridis — Tue, 12 Jan 2016 14:21:33 GMT

However, you are not getting 4g calls (volte) as when you connect a call it drops to 3g instantly.
The only way you can get HD audio constantly in calls is by selecting "wcdma only" but yes, you lose 4g data which may not be beneficial.

Re: Bad call quality Xperia Z5 Vodafone Operator

RobertoDS — Tue, 12 Jan 2016 14:22:04 GMT

So, when I am on 4/3g prefered, my call goes directly in HD Audio, if other part is compatible, right ?

When I'm out of 4/3g range, call goes directly to 2g, right ?

Re: Bad call quality Xperia Z5 Vodafone Operator

Lord_viridis — Tue, 12 Jan 2016 14:24:10 GMT

Quick question, you said originally "and my girl with Z3 (3g*2g because hasn't 4g) !"
Does your friend live in a poorer signal area without 4g?
If so, it's probably her phone dropping to 2g and ending the HD audio

Re: Bad call quality Xperia Z5 Vodafone Operator

Lord_viridis — Tue, 12 Jan 2016 14:26:00 GMT

@Robertods88 wrote:
So, when I am on 4/3g prefered, my call goes directly in HD Audio, if other part is compatible, right ?

When I'm out of 4/3g range, call goes directly to 2g, right ?

Correct, the 4g is irrelevant to your calling, the important part of the HD audio in calls is good 3g coverage,

Re: Bad call quality Xperia Z5 Vodafone Operator

RobertoDS — Tue, 12 Jan 2016 14:32:18 GMT

Has a poor area with 4g, very poor, but there's !
It's probably due to the thing that she hasn't 4g so can't keep the phone on 3g stably, just like me !

Re: Bad call quality Xperia Z5 Vodafone Operator

Lord_viridis — Tue, 12 Jan 2016 14:33:23 GMT

http://blog.vodafone.co.uk/2014/09/11/hd-voice-comes-to-vodafone-uk/

For a quick explanation.
On Vodafone atm

4G = high speed data use only (VoLTE on some handsets)
3G = HD Voice, Data,
2G = standard voice calls, slow data.

Re: Bad call quality Xperia Z5 Vodafone Operator

RobertoDS — Tue, 12 Jan 2016 14:33:50 GMT

But she has a good coverage in 3g.

So probably, she's often on wifi, and her phone goes very often in 2g, because she has settled 3g prefered/gsm because hasn't got 4g, so it's useless to put it on 4g prefered.

Re: Bad call quality Xperia Z5 Vodafone Operator

Lord_viridis — Tue, 12 Jan 2016 14:34:41 GMT

@Robertods88 wrote:
Has a poor area with 4g, very poor, but there's !
It's probably due to the thing that she hasn't 4g so can't keep the phone on 3g stably, just like me !

I agree, I believe the issue is her connection and unstable 3g in her area.

Re: Bad call quality Xperia Z5 Vodafone Operator

Lord_viridis — Tue, 12 Jan 2016 14:36:34 GMT

If the area is 3g only, even a good signal might be poor bandwidth due to many people all stuck on 3g and over populating the masts.

Re: Bad call quality Xperia Z5 Vodafone Operator

RobertoDS — Tue, 12 Jan 2016 14:39:18 GMT

So I must advice her to keep his phone in ONLY 3G so probably calls could be better, because area is fully fulfited by 3g !

I'm always on 4g prefered to be able to run a high speeds and do some great calls !

Re: Bad call quality Xperia Z5 Vodafone Operator

Lord_viridis — Tue, 12 Jan 2016 14:42:03 GMT

Yes you can try that,
Be mindful tho, that even on 3g only, if her bandwidth is too poor, it will drop HD audio still. It needs a fairly decent connection, which luckily you have, hopefully so does she.