so if i am from mexico , (if a am going to buy ship sim) the pesos become to euros?(euro=18.65pesos)
Hi.
When you use your credit card, you pay your credit card comany as usual. They just convert the Euros into the equivalent local money.
But, the exchange rate that you see on the internet won't be the rate that your credit card company give you. There are two rates. One is the rate that you pay when you buy foreign money and the other is the rate that you get when you sell it. The rate shown on most Internet sites is halfway between the two. So you pay a bit more than the page says.
You might find that it is 1 Euro = 18.50 Pesos (or something like that)