About discovery card question

[codewalker]

The American discovery card in overseas uses ,Must telephone to give the bank first ?Also or has one kind of card, does not need to telephone first .If you knew that please help to explain, thanks

 

[codewalker]

Does anyone know, I urgently need an answer

 

[lantador]

"Must"? No, but it's hit or miss.

It's good to call ahead before making any large purchase. Otherwise they call the vendor and ask to speak to you.

 

[codewalker]

Escape by Discover Card or mile by discover card,Who know their bins?Please tell me, should be able to solve my problem