Applied for a position in the US. 3 interviews with 4 interviewers. Over time it became clear that they had a pre-selected candidate and this might have been practice for some of them. Only 1 of them actually read my resume which was pretty disrespectful of my time. Entire process took about a month. Interview 1: Could tell they did not prepare for the interview and did not read the resume. Could not tell me anything about the job other than it's ambiguous and that I could develop in the role several different ways. Only asked really generic questions like "Why T-Mobile?". Despite this, interview went great. Interview 2: Interview with two people. One seemed extremely nervous asking me technical questions about things irrelevant to the job posting and my resume experience. I don't think English was their first language, so having a communication barrier was not an ideal experience for either of us. The other individual was very professional and seemed to understand my resume and how it applied to the role. Overall interview went great. Interview 3: At this point it was clear they had someone else in mind for the role, as the fourth interviewer kept rescheduling our interview. When they finally were able to commit to a time, they seemed annoyed to be on the call (I'm the one not getting paid to be here lol), and rushed through some more 0-prep questions that were basically a repeat of interview 1. Asked me about 10 generic questions, then when it was my turn to ask questions, gave short, uninformative/unknowledgeable, one or two word replies. This interview should have been cancelled as to have not wasted both of our time. tl;dr - 1 of 4 interviewers actually read my resume, lots of reschedules, disrespectful of your time

It’s very different from group to group. There is not a standard script that’s used. They do not perform any technical testing either. They have many levels of interview with various groups with their organization