CPP is calling party pays, and is what one finds in most of the world. Meaning, your inbounc calls to a phone, or mobile phone are free for that person, but more expensive for the "caller". That said, normally rates to mobile phones are more expensive, essentially they are putting both sides of the cost together for the caller. I think it sprang up in the past, when costs were high and they were trying to encourage adoption of mobiles, otherwise people just wouldn't have used them.

Most calling plans and even calling cards are going to have higher rates for calls to a mobile.

But some done, like the one I mentioned and always use, IDT through their debitalk.com card. Those rates are just as they would be for a regular POTS number. Don't ask me how they do it.

So, if one has a SIM, even a prepay SIM, simply setup a call back service to your phone number on that SIM, and let the call back server "ping" your phone with a call, a FREE call. Then, you are connected to the service in the US where you simply dial as usual. You pay, the cost from call in US to whereever you are, and the call in the US to wherever you are calling, but the latter price is very low and the prior cost, with this card, is also very low

Those were the prices I quoted above.

I like this company the best (but am always open and interested to find others!) because their costs are low, the service quality and VOICE quality is high, they are pretty tech enabled, meaning I can change the call back number from the internet with no cost and I can get a detailed billing in seconds through the interent, AND, the card and the money you have put on it never expire, there is no upkeep or monthly fees. No costs to setup the card and with a company like IDT I don't worry about them dying out.

Yes, buying a SIM in another country and simply dialing the US is COSTLY!!! Same your money for chocolate for the stewardesses!!