My two cents go to uniontelecard.com, i like that phone cards are clean, rates are not only cheap but guaranteed and the communication is stable. they are always launching new products to specific destinations, cards have a lot of different access and languages, they can be used from different countries, there is speed dial and pinless access for the cards, auto recharge, online billing report, a 20% from welcome promotion, 10% discount on some cards and idt is the provider so there is no scape for them
there is a new phone card to call latin america and another one to call afghanistan