Can I use it in Korea if I buy a cell phone directly from Amazon?

pu1. I don't know what phone I use, but I just need to put a USIM on my iPhone

2017-12-15

OK

pu2. I need to check because I can apply for iPhone or not. I heard that they use different kinds of iPhones in the U.S. than in Korea

2017-12-15

OK

pu3. The sales page shows what frequency you can use for Android. We need to check if it's a frequency supported by Korea there. And I need to buy factory unlocked

2017-12-15

OK

pu4. As Weppu said, you can buy factory unlocked at all, or even an at&t phone with an unlocked phone

2017-12-15

OK