I had three phone interviews. The first interviewer did not have the related background and he was constantly laughing during the interview as this was a prank. The second interviewer was more knowledgeable on the topic. He said that I am going to receive an offer. Apparently, I needed to do another interview with someone else. During the third interview, I felt that the third interviewer is very insecure about the technical discussions and he was constantly trying to prove that he knows more than me. I withdrew my application after the third interview.