Because anything's possible, probably. That's my personal, unscientific opinion at least. However, instead of speculating on whether there's AT&T in heaven, I am talking more of, how could your seemingly innocent phone be involved in talking to dead people?     Rogo & Bayless first struggled to decide whether these were really what they termed "incoming calls." Are dead people really somewhere else, using the phone the way you do when you call Mom, making all the phones on your line ring?     The disturbing flip side of this is that perhaps they aren't. Maybe some ghost chilling in your house does something ghostly to make your phone ring and then has some disembodied voice coming out of your phone speaker. Rogo & Bayless termed the latter theory "paraphysical" and the former "electromagnetic."     After looking at three clues, they decided that it's probably not an either/or situation. First, a lot of cases they saw, all the extensions in the house rang.  Second, a good amount of their calls were connected by operators (this shows how dated their research is; in the past, long distance and other phone company business was routinely connected and conducted by real live people).  Finally, at the end of a call, lots of folks report hearing the normal "click," and the line returning to a dial tone. All these things are normal, right?     However, some witnesses have specifically recalled that only one of the phones in their house rang when they received a phantom call. People have also had instances in which their phone's ring did not sound normal. People have reported it as sounding "deadened," or just producing a "half hearted tinkle." In older cases before direct dialing, operators would deny having connected a call to the recipient of a phantom call. Additionally, reports from people in hotel situations, where calls go through the front desk, include claims from switchboard operators that no calls have been put through to the room in question. As far as a usual end to calls, there are reports of the line staying open, or suddenly going dead.     Additionally, in cases where things like this are present, there's oftentimes other things that indicate that the phone is not working as usual: preceding the calls, the phone will ring and the line will be dead, there will be lots of static and crackling on the line.  People have even reported problems with "hang ups" for a day or two in advance of a creepy call.     All this information led Rogo & Scott to believe that the majority of calls from the dead are of the type they termed "paraphysical." If the phone is being manipulated through some type of psychokinesis, it would follow that only the phone is question might ring, the current activating the bell might be slightly different as to make the bell sound unusual, and there would be no need to go through normal channels such as switchboards. *Electronic Voice Phenomena*  The paraphysical theory is also in line with the paranormal occurrence known as electronic voice phenomena (EVP). In the late 1950's, the idea of recording the voices of dead people on cassette tape started to pop up. This was done by just recording silence or conversation, or sometimes requests like, "Hey dead people what's up?" Although there was no audible response at the time of recording when played back, sometimes tapes would be full of weird voices.     By the 1970's the idea had become more widespread, but was not taken seriously by researchers due to many reasons I am too lazy to type, since this isn't really an EVP page. Look at links if you are dying to know more. It seems like it's becoming more of a hot paranormal topic as of late, however.     As far as it relates to phone calls from the dead, if you believe that dead people, or spooky entities or your extra-dimensional being of choice, can manipulate a tape recorder, it would be a simple jump to think they'd probably be able to handle a phone as well.     The creepiest point of the connection between these two things is that Bayless and another researcher, while investigating EVP, discovered that if the microphone on the tape recorder is covered, no voices would be recorded. They took this as an indication that the phantom voices are not imprinted directly on the tapes, but that they must go through the microphone, even though you cannot hear it at the time. This means the voices have to be paraphysically produced right in front of, or somehow through the microphone, which is in line with the paraphysical theory of phantom call production. This would mean that not only were you communicating with some kind of disembodied entity, but that it was somehow in the receiver of your phone, instead of a "normal" caller who's far away. Icky.