Changing the subject away from cellnuvo for a moment (dare I!). Just wondering which MVNO or prepaid providers have been the stars for you guys and girls since leaving ringplus. Or for 2017 if you weren't a ringplus customer.
I've personally tried many. Twigby, Tello, Cellnuvo, Freedompop in a dual sim phone, Speedtalk (tmobile and verizon), TPO (Tmobile), Mintsim. Also sprint postpaid but that isn't an mvno.
My current daily driver is TPO on tmobile. They came out with a range of excellent low costs plans via the ringplus forum. I've recommended them to many people and I haven't heard of anyone being disappointed. It is reliable and cheap. I've had no need to contact customer service for anything. https://store.tpo.com/promos/welcome
Honorable mention: Tello. If it wasn't a sprint MVNO I would have praised them the most. Their dashboard is excellent, customer service top notch, paygo cheap and without many of the requirements other providers have to top up, plans are decent and much more. Sorry Tello - add tmobile and you'd be my top pick. I still have a couple of lines with you though.