Originally Posted by mikesaidyes

You can book a driver through local travel services websites like Trazy, Korea Travel Easy, or Klook. Very easy. Or, you can just grab a taxi from the Seoul taxi line outside. They're totally fine and don't try anything. Pay with a credit card, get a receipt, and the taxi fee should be around 60-70,000W. I live in Gangnam (by Gangnam Station) and it's always 60 - and then a taxi to that area from my house is like 7-8,000W. If they try anything - you can contact 1330 Korea Tourism Helpline and they will file a complaint against the taxi driver and he will lose his license.

For WiFi Egg - book in advance for sure for best rates. I have used KT for eleven years living here, and I always recommend them myself for most reliable English service and network quality. You will find other eggs on other websites, and they use the KT network, but are operated and serviced by, IMO, lower quality carriers (Think like Cricket or Boost that use say AT&T network. http://roaming.kt.com