A:AnswerYou'll need a 220 plug adapter if you purchased the charger with the US plug. Check to see if you can order a charger specific to 220 volts in the wattage you use to charge your phone.
A:AnswerThe Samsung spec says it will accept 110-220V input.
Of course, to use it with foreign outlets, you'll need an adapter to use the different type of plug. But you don't need a 220-110 converter.