Korea uses European-style plugs.
Country code: 82
Calling U.S. from Korea: 011-1-number
Korea has both CDMA and GSM.
Verizon website verifies that South Korea is a CDMA country for which the international roaming rate is $1.99/minute. Texts are $0.50 to send, $0.05 to receive.
Unlimited data plans cost $64.99/month. (They call it Global Email, but it works for all data.) They'll pro-rate half a month for you. To update roaming capabilities on your phone, dial *228 option 2.
For international support, call:
- 800-711-8300 (in U.S.)
- 908-559-4899 (abroad)
May 2009 CNET article on traveling abroad with your cell phone.
Possibly useful sites:
- Korea map apps for your iPod. Sadly nothing for iPad yet, which isn't widely adopted in Korea.