I applied online. The process took 2 weeks. I interviewed at T-Mobile (Bellevue, WA) in Oct 2011
Interview
Started with a phone screen from a senior recruiter who was phenomenal. A lot of technical questions (15-20) before getting a chance to speak with the hiring manager. Flew in for a day of technical interviews with the team ending with a panel whiteboard session. Everyone was competent and polite.
I applied through an employee referral. I interviewed at T-Mobile (Bellevue, WA) in Nov 2013
Interview
Depending on the job description can be intense. Background verification must after offers. Technical panel to interview and management and HR panels interviews in separate rounds. Overall will be a friendly one.