I have an awful O2 signal where I live (a fairly large town in Kent, so no idea why we're neglected by O2), so I'm having to rely on wi-fi calling. However, this is very inconsistent; I often have 0 or 1 bar of phone signal (not even 3G or 4G) and yet the wi-fi calling isn't active (i.e. the phone symbol for making a call doesn't have the wi-fi bars showing and if I try to make a call it won't connect). A few minutes later, it will suddenly become active again and I'm able to make / receive calls.
This results in me missing quite a few calls where the first I know about them is a voicemail notification from someone who couldn't get through.
Is there a reason why this is so intermittent? It's not as if the O2 signal occasionally strengthens, because it never does. The wi-fi signal itself is always strong so it's not that the phone is having issues connecting to my network either.
I'm using a Samsung Galaxy S10 on an O2 pay-monthly contract.
