QUOTE(koinibler @ Feb 20 2011, 11:39 AM)
I book for all 3 telco on visitseoul.com, but only SK and S Roaming give a conformation.
I go for SK with rent of 2 phone, each 1,500 won/day (discount), and cc verification.
When I return it back, I need to paid 22,200 won including rental and another phone is 7,500 won only.
I use mainly to call 02-1330 and my other rental phone.
Definitely cheaper than roaming.
When I ask around (information, korean student) the night that I'm arrived, most of them suggest me to take a bus to go to downtown Seoul. I do believe, this is because they didn't know of the new AREX train

. End up taking an expensive limousine bus 15,000 won to Seoul. When I go back to Incheon on my last day, I take AREX

U can't find Arex upon arrival ? I thought there are signs to lead you there ?
Tips to share (for non english speaking country)
Before departure, google up some picture of places, things, services, transport you intend to go, buy or use and take those pictures with you camera. Show these pictures when you ask the local for more info.