I Used to have Verizon several years ago before switching to Republic Wireless. The one thing I miss that they did right, was their text messaging app. Too many features to get into here but, if you (developers) have a verizon phone or friends have one, then check it out and emulate it. It’s a nice texting app. Also, being able to block calls straight from the caller history was nice.
It’s been so long since I had it, I can’t remember all of the features but one ofhtem was being able to save your messages, then delete what shows up. Like an archive feature.