OK so lets say you have two Voip apps on your phone, WP and XY
You try XY and drops out.
So then you try WP, and being on the same standard Voip, WP drops out as well.
But you see this advert on WP, says try our high quality short haul Voip, for x dollars per minute.
And Wholla, you have a brand new paying customer.
(oh, and then you delete the other ap)
