Run out of options, any advice?

[Tolkienista]

My Motorola g31 phone is still under guarantee so I've been able to eliminate it from the ongoing problem I've had since June this year.

Making and receiving phone calls from home is an ongoing issue. Not for everyone, but you never know when the call will suddenly end or the person I'm speaking to will say....."can't hear you"

I've been into O2 stores multiple times, new SIM card, lots of settings changed. 

My phone was sent back to the manufacturer last week. Came back with a replacement main board, software update and a factory reset.

The very first call I received when I got home was the familiar refrain, twenty seconds in....."can't hear you"

What did I do now?

[MI5]

Pretty sure you can't.

[Tolkienista]

Yes I get that.

I'm on monthly payments and WiFi is definitely enabled as sometimes the symbol will come up at the top of my screen when it has switched to WiFi calling.

Had to phone an organisation today, was on hold for around 15 minutes, eventually got through and within a minute i got the familiar words.......I can't hear you.

I was right next to the router, thankfully normalISH service was resumed.

[Tolkienista]

It is 100% set to WiFi calling.

[Enlli]

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@Tolkienista wrote:

It is 100% set to WiFi calling.

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As asked previously does your phone let you set it to wifi preferred?

Both my networks, EE and O2 are set that way so it is the default method of calling when at home 

[MI5]

I tried.....