I received several calls from this number an never picked up. I finally did and said, "hello" and received no response. About an hour later received a blocked number call from a company claiming to be Alpha Tech, and that they were trying to send us an updated copier manual. I suspect the 646-844-9090 is a call looking for a human. When it detects a human it gives that number for a follow up call trying to pull the scam where they find out your copier info, send you unrequested toner for it, followed by a ridiculous bill.