I've been getting calls like this every once in a while. Sometimes they leave a message,
sometimes they don't. It's usually some India-based recruiter for some high-tech job
for no money.
On the other hand, I've been getting calls from recruiters, lately, about jobs in Digital Imaging
(GE, Siemens, etc.), sometimes even state-side recruiters..
I didn't answer the phone because I didn't recognize the phone #.
They don't usually call back.