I applied in-person. The process took 1 week. I interviewed at T-Mobile (Fort Collins, CO) in May 2008
Interview
Every interview is conducted using the STAR format, which is a behavioral based question format. ST = the situation/task, A = the action you took, and R = the result or outcome. They want you to be very specific and do not generalize - pick a specific scenario from your past and cover all 3 of the above topics. The inability to follow the guidelines is an easy way to weed out candidates.
This is how I was interviewed and it was very easy once I understood what they were looking for. The saying is, "past behavior predicts future performance". They want to know what you did in the past because you will probably do the same thing in the future, so be careful about the scenarios you choose to include.
Interview questions [1]
Question 1
"Often times we are faced with customers with unreasonable demands. What is the most difficult customer interaction you have ever dealt with? How did you handle the situation and what was the result?"