Apparently a few years ago stalkers were texting their exes from payphones with no way for their exes to know where the call was coming from, so now when you text someone from a payphone the phone number of the payphone is also texted to the recipient. Not sure about voice calls, might show up as private number.
I heard the number shows up when you are called, it's not private. That's probably why. I didn't know you could text from a payphone though!
You can send SMSs but the experience is a bit dated since the phones are all probably from the early 2000s. It's much like sending a text on an old Nokia phone.
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