[davidtheprof]

so it's not a solution for roaming outside your home country, if you have to pay high incoming call costs to the carrier in addition to the charges to easycallback.

But useful where roaming and incoming is much cheaper than outgoing.

In the US, we already have cheap international services from mobile phones, such as Tel3 and google voice. Main advantage of easycallback (for me, at least, based in US) seems to be very cheap rates to European mobiles - e.g. to UK, under 2c/min compared with 18c (USD) on googlevoice or Tel3.