iPhone 6+ and IOS 10.3.1. I love the way I can customize the Text Tone within Contacts. I have a girlfriend that I want to keep up with texts. Original texts come through fine with her distinctive tone. However, if she replies fairly quickly (can't tell if this is time based, or phone-status based), I just get a little Swoosh sound that I'll often miss...causing me problems. I've searched everywhere for ways to change or highlight the followon message sounds, or always get the primary text tone, but I can't figure out how. Any way to do this? Also, if you know the IOS term for this text reply sound, that would help also. I hope the question makes sense.