I had a phone screening interview for a Wireless Research Engineer position. The interview was conducted by one of the engineers and lasted about 15 minutes.
The process was straightforward and not overly formal. The interviewer started with a brief introduction about the team and the role, followed by questions about my background and research experience.
Most of the discussion focused on:
My work in wireless communication and signal processing
Experience with RF systems and I/Q data
Projects related to machine learning or research work