Within a matter of days of going viral, Zenofon has hit 3000 members. It is particularly popular in India. For those of you who are looking for cheap calls to India, Zenofon charges only 3 cents a minute! Remember to use the callback option to enjoy this super cheap rate.

Due to the number of members, Zenofon has now reduced the free credit available to $1.25 per customer to call anywhere in the world (previously they were giving $10), but you can still get an extra $5 in credit when you become their fan on Facebook.

Sign up for Zenofon here.