CallMe! is bringing phone calls back to phones.
But... why?
How rude! Calling someone without first getting their permission is pushy and annoying. Even though many of us secretly want to get calls from specific people, we wouldnt dare make one.
Its personal. A single availability status for everyone you know is not how people deal with each other in real life.
Im busy. Life is filled with stuff to do, even when we want to call someone, sometimes we forget.
Im bored. Life has ups and downs, sometimes we can all use a little attention.