Two 45 minutes phone interviews, 15 mins apart. First interview went over some questions like describe a hard problem that you have solved and why you want to work in Amazon. Then there is a simple coding problem. The second interviewer asked questions on very basic data structures like trees, as well as another coding problem. The second interviewer was much nicer than the first one. The second interview went much better because I was given the option to type my code into the laptop, whereas I had to read out the code to the first interviewer.