What's the cheapest way to make an international call to a cell phone?

I need to call someone in Guatemala with my Cingular cell phone. What's the cheapest way to do it? Should I get a calling card?

Okay, I want to know if you make an international call to a cell phone, from your home phone would the number show up on your bill?

I live in Puerto Rico the first time i call my boyfriend to his cell phone in Jeddah i has luck , but later in the second , third, i cant call again .Please help how i can make a call ? i read about the code is 011+ 966+ 50+ ??? - ????

see my bill is showing one and we don't even have relatives,friends,nor children that could have made that call?can the previous owner of the phone number make an international call and give out that number to be billed to?

I will be in the Netherlands for 1 month and need a cell phone to call the US (personal use). It is also likely that the US will need to call me (business conference calls). Is it ...show more

Cell-phone rates are ridiculous. What's the cheapest phone card out there?

i am 17 and i really need a cell phone and i really would like to know my options before i buy a phone and find out something cheaper, but what i want it for is texting and talking i would like unlimited on both i don't need an expensive phone just want...

I have a friend who is stationed at Aviano AB in Italy, and I am in the US. SHe has a cellular phone, and gave me her number, but everytime i look up the city code, it says the number ...show more

I am trying to call my girlfriend's cell phone in Spain and I can't find anything cheaper than 30 cents per minute. Any help would be great. Thank You!!!