i used to buy SDI ASIA QUEEN paper card from the store I used to work. The price was $1.75 for 2$ card and $3.75 for $5 card, that is 75% of the card value. That was one of the  best card I have used. Connection ma ale ale problem huntheo, but voice quality was good and balance unnecessary ghatdaina theo. Now a days, i m missing that card.