Uk network for voip calls

[andy]

Originally Posted by fsotirop

which UK networks allow voip calls when using data through their mobile networks?

I don't know, as I haven't explored this much.

I've made inadvertent calls a couple of years ago using data on O2, the first time using Fring before I'd explored its settings, and it switched to mobile data without me noticing after not connecting to an exhibition hall wifi for a while