At times it can be difficult to schedule a service call with a cable/phone/internet provider when you notice an issue. So, it’s no wonder Consumerist reader Jack was suspicious of a voicemail he received last week from a someone claiming to be a Comcast employee notifying him that the company had detected poor signals reaching his equipment and offering to send a tech to investigate the issue. The message struck Jack as odd, because, for one thing, Comcast isn’t exactly known for its stellar customer service rapport, and he hadn’t actually noticed anything amiss with his current service. “Hi, this is Jeremy.