I'm not sure if you know this or not but yes, we answer our own phones here. All the time. Even in the middle of the night. I can't tell you the number of times this week someone has called my office at 9pm and stuttered something like "I thought I'd get the machine." Well, no, you got me. And that is not a good thing.
I had one very chipper lady call to alert me that she was sending a query by email. She knew a lot of email gets lost (it doesn't) and wanted to give me a heads up to watch for hers especially.
Then of course when I said "ok sure, you betcha" she said "unless you have time to talk right now." Well, the answer to that wasn't "ok sure you betcha" it was "remind me of your name now so I can go delete your query unread."
Please, I beg of you, do not call an agent. Don't call to pitch, don't call for advice. The only thing to call for is to confirm a mailing address if you get mail RETURNED AS UNDELIVERABLE to you. If you see several addresses for an agent (and there are at least four floating around for me) use the one on the agency website. Failing that use AgentQuery. They keep up to date better than almost everyone else.
Unless you are a client, stay off the phone. Every single person who calls me gets rejected. Every single one. I can overlook mistakes of all stripes but there's not a single reputable advice site that says "call" that I can think of. If anyone says that, they're just plain wrong.