VOIP - best no/low cost solution?

[Bonefish Blues]

Morning all, I've just migrated networks from 3 to Sky (O2) for reasons not unconnected with price, but also the promise of good quality indoor reception in our notoriously poorly-covered village.

All's not well - at best I have a bar or two of O2 2G cover. No problem I thought, I'll use the bundled internet calling like I used to for 3 (rather crap and now unsupported, but at least it was there). Nope, nothing available for my phone (Mi A1) via Sky, it seems...

Call quality's poor as it is, even if the call comes through, so I need to route through our internet for both incoming and outbound calls, does anyone have recommendations?

[Zato]

https://www.sipgatebasic.co.uk/ is very good