Cellphones are my favorite tool in the afterlife especially when I'm looking for individuals. Years ago, when I would try to visit people either for PE's, remote viewing, meeting up with guides, I would ask to visit that person. Most of the time I would woosh through the astral and arrive somewhere - sometimes to that person but a lot of times the wrong place/person. Meanwhile, the dizzying experience of going "there" wasted precious seconds of lucidity.
Then, I had an experience once where I picked up a thin rod and for some reason I put it to my ear. I could hear a female voice on the other side. It turns out it was my soul guide. Even though I was in the astral at the time and she was likely in a higher plane/focus level she was able to communicate with me through this object.
I realized then that I could use a phone. I tried out a series of experiments where I dialed the number 2-1 in my phone, and always got the same woman. This particular person was(is?) another aspect of my soul/Disk. Needless to say, the phone method stopped working with her when I started asking too many questions on how to contact her in the physical. Apparently, I'm not supposed to do that
So, in short. I highly recommend to any explorers, try taking out and using your cellphone.
-mike