I had my phone interview with Google 2 days ago, the question was similar to Chaining Broadcast Signals but not the same. The interviewers voice was cutting all the time, because of that issue it took me a while to understand the question itself. I asked him the clarifying questions I wasn't able to hear or understand anything and, I told the interviewer about this situtiation and he told me that he is using the company sim card, and there is nothing he can do. I wasn't able to complete the question (I found the optimal solution but had hard time implementing it) because when he tried to lead me or correct me I wasn't hearing anything. I mailed my reqruiter about this issue and he told me basically nothing. So I have to wait for a year to reapply.