Hi hotcopper12,MNF have the same ability for VoIP Wi Fi...

Hi hotcopper12,

MNF have the same ability for VoIP Wi Fi too.

"MyNetFone unveils VoIP Wi-Fi phone Increased mobility; decreased costs Australian home and office users can enjoy all the convenience of wireless mobility combined with the cost savings of VoIP thanks to the release of a VoIP Wi-Fi phone from MyNetFone. Delivering high quality, cost-effective communications, the MyNetFone VoIP Wi-Fi phone is easy to use ideal for those who want the cost savings provided by VoIP as well as enjoying the freedom and convenience of a wireless phone. Compatible with IEEE 802.11b standard, MyNetFone’s Wi-Fi phone enables users to make and receive calls within any Wi-Fi environment indoor or outdoor and via their broadband Internet connection"

They both use Nokia supported devices ONLY.

Heres the links for both:
http://www.tesco.net/talkwifi/what-is-talk-wifi.html
https://www.mynetfone.com.au/residential-voip-solutions/features/on-the-go/

Cheers,
The Sparkler