I don't actually use SMS but I don't think that most people get read/receipt confirmation. The little check-mark system in WA is a big step forward compared to

I don't actually use SMS but I don't think that most people get read/receipt confirmation. The little check-mark system in WA is a big step forward compared to plain texting. Of course, similar features exist in other chat applications, but if the comparison is just between WA and SMS, that's a big difference.