> I have been receiving calls on my cell phone and the caller id is
>> 15555551212 but there is no one on the phone when I pick up.
> Considering that 555 isn't a valid area code and xxx-555-1212 is
> Directory Assistance, why do you even bother answering that number?
Unless he's turned off his voicemail why would it continue to ring? After 4 to 6 rings at the most it should roll to voicemail. Most cell phones will let you press the "end" key to immediately silence the phone's ringer or send it to voicemail.