I applied for a Market Manager position on the T-mobile website, but after 2 weeks of hearing nothing back, I contacted one of their recruiters (found them listed on Linked In). Once I emailed my resume to the recruiter, I got a call back within a week. They told me they were going with an internal candidate for the posted position but they were expecting another position in the area to open soon. The call lasted about 20 minutes and consisted of a brief run through of my work history, what I knew about T-Mobile and why I wanted to work for them, and my experience in managing others. Within another 2 weeks, I was scheduled for a meeting with the Region Director. The interview lasted one hour and consisted of work experience, management experience, etc.
I would highly recommend 2 things to anyone interviewing:
1) Prepare yourself for the interview by reading about the company and their latest products. If the position is a management position, visit several stores and have an opinion on what you you might change about the service experience, merchandising, etc if you were in charge of that store.
2) They are inundated with resumes for their management positions. I would try to contact a recruiter if possible.