If you find yourself in transit at Suvarnabhumi Airport or there is a flight delay, you will be glad to know that you can apply for free WiFi. The counters for this are flight side. You have to write down your name, nationality & passport number. However, they are not strict and don’t check what you write. Which was good for me as I didn’t have my passport and couldn’t remember my number. You are then given a username and password which is good for one hour. They told me that I can apply for another if it ran out.