How does Spark fibre VoIP work?
Do I need to buy new "landline" phones? If I can use existing old landline phones do I need to buy anything to use them? Where do they plug into and can I somehow repurpose the current wall sockets that they plug into?
What happens if I go to Spark fibre VoIP and then change ISP to another that offers a VoIP "landline"? Will the transition be smooth or would I need to change the "landline phone" setup again?