I'm using who are you. It's nothing fancy but it's tied to you mail if you ever used that. I use Google voice now but it still works pretty good. Even callers who come up unknown, it will track down where the phone number is from, but not who it is.
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Sad how years ago caller id on landlines cost money and now today is just an added feature. The cell companies want you to pay for the service like its still the 1990s lol. Kinda like a step backwards.