No 4g calling or call waiting

[Arranbliss1]

Got a new sim only contract (returning customer) and I’m using it in an iPhone 13 pro max. Since using the BT sim I have no 4g calling and no call waiting, both of them are switched on (as far as I can tell). For the first couple of days of using the sim it would cut the data all together while on a call, now it switches to 3G as soon as I make or receive a call but call waiting hasn’t worked at all. Above tried resetting network setting and then resetting all settings but neither have made any difference. I don’t think it’s an issue with the handset as it was working fine with Vodafone before switching to the BT sim. Anyone have any ideas? 

thanks 

[imjolly]

As you have changed mobile provider did you check the EE/BT coverage in your area?

https://coverage.ee.co.uk/coverage/ee

[Arranbliss1]

I’m a returning customer and a lorry driver, it’s not a coverage issue, happens all over the country even when I’ve got a full signal on 4g or 5g

[imjolly]

If it is not a coverage problem and you have the correct BT APN then you need to phone CS 150 OR 0800800150 from mobile and they should be able to help you

[Arranbliss1]

The APN settings are not there. There is no option to view apn settings 

[Arranbliss1]

I have just discovered that call waiting works when I’m connected via Wi-Fi calling, doesn’t work when not connected to Wi-Fi