Phone interview. Lasted for an hour. Asked questions on analog circuits, RF IC basics, etc. Mostly tested on CMOS analog IC Design knowledge. They were hiring design interns for the MCU team at Austin, TX. Should be easy if you've done courses on analog/RFIC at college.

Skype interview remotely happened when I was in Japan in a conference. Not too much tech questions. More about my experiences and so on. Was tired beam cause of jetlag.