Interview process was pretty typical of large high-tech company - but a bit longer. Phone screen with HR followed by in-person interview with hiring manager and one mnager higher. Usually T-Mobile has group interviews with 3-4 people who are at same level as hiring manager. They have list of standard situational questions - ie. Describe a time when you had to do such and such. There is a defined process of levels of managers you have to interview with to get an offer depending on the level of the job.