I tried 0 10 16 on how to use Indonesia's indosat calling card and how to make domestic calls, but I didn't understand many bird words. Received a text message.

The cheapest is the "3" phone company card. IP phone calls 299 guilders in Asia for one minute, plus 0108986135xxxxxxxxx and then dial the number.

Followed by IM3 of INDOSAT.

Call IP: 0101686135xxxxxxxxx.

I use these two cards myself, because it is cheap to make a phone call, so the network is often busy and can be replaced. Moreover, the network coverage of "3" card is not extensive, but it can be used in big cities, and there is no signal in small places.

INDOSAT IM3 is more comprehensive and can be used in most parts of Indonesia.