I can’t tell you of an mlm - because most of them stopped - as the calling card industry almost died with the advent of cheap long distance and unlimited voip plans. However - below is the link to the calling card i use when i need one and the voip plan i use.

Check this one out

There are few that I may suggest to look at:

1) Tel3advantage - 2 levels
2) Nobelcom - 2 levels
3) SpeedyPin - 2 levels
4) Cloncom - 2 levels

See for details

My experience points to Tel3advantage as the best program out of these 4.

There are several. Do you want a calling card for telephones or are you asking about greeting cards? There are MLM ’s for both. You can research the companies on Onlinemlm.com

I recommend you do a little research with the Business Opportunity Search Engine. Being community driven it’s a cross between a search engine and a Wikipedia. You can add, delete and improve the results for much more focused answers than a general search engine can provide.