Hi,

my friend will be calling frequently. Which 1010 number is the cheapest? Thank you in advance! Chris

Depends on when you call, how long your calls are etc. We use worldxchange's 1015335 thing and get charged $.17/min (10 min minimum):

http://www.xpectations.com/home_products.asp

They have several other plans too that may be better if you make short calls etc.

Here's a side by side comparison of some plans:

http://1010phonerates.com/se_asia_one.html

Not sure how accurate it is but at least a starting point...