Sony Xperia cutting calls after 17 minutes

[Rosy]

My Sony Xperia is cutting me off from conference calls after 17 minutes. It did it 3 times in a row at the 17 minute mark so I'm sure this is not me pressing something and not a network connection issue. Is it a setting on the phone or something O2 has imposed?

[Bambino]

Seems to be a Sony day today. @Rosy  Here is the link for Sony support:https://www.sony.co.uk/electronics/support

I will also tag @viridis who is our resident Sony expert.

[Anonymous]

@Rosy O2 won’t have done anything. It’ll likely be a setting somewhere In the phone

[Anonymous]

@Rosy 

Does the phone restart when this happens?

What happens on a standard call?

If it does it could be weird issue that has developed in Android and could be fixed with a factory reset or it could be a battery issue where the battery isn't supplying a constant current.

Make sure you back up your contacts to Google https://support.sonymobile.com/global-en/xperiaxa/userguide/backing-up-contacts/#gref

Then do a factory reset https://support.sonymobile.com/global-en/xperiaxa/faq/apps-&-settings/the-phone-freezes-or-applicati...

If that doesn't fix it you'll need to get it looked at.

[MI5]

Dropped calls are invariably a network issue.

[Rosy]

No there are no other symptoms. There a is single beep and the call ends but otherwise the phone seems fine, like it was very deliberate. It might be a time out because I'm not speaking but if so I'd hope there is a setting somewhere to increase the time out delay and I can't find one.

[MI5]

If it is the standard network time out (designed to prevent accidental calls running up huge bills) you can't change the setting yourself.