One of my contact has a half moon next to the text. and there's no text tone from that contact. How can I restore tone for that contact? I've tried everything possible that I could think of. I have a 6 plus, 16g, and have a 11.2.5 software up date. I think the half moon has to do with the, Do Not Disturb icon.
iPhone 6 Plus, iOS 11.2.5
The moon means you've hidden alerts for that contact or conversation. You can swipe to the left on the conversation in Messages and select "Show Alerts" from the colored options that appear.
Use Messages on your iPhone, iPad, or iPod touch - Apple Support
When Hide Alerts is on, 
will appear next to the conversation.
It's not necessary to delete then re-enter the contact. All he has to do is open a text from this contact, tap the little circle with the i in it and uncheck Hide Alerts for this contact.
Hi
This means do not disturb half moon delete contact then add back again.
Cheers
Brian 🇬-1F1E7;
One of my contacts has a half moon next to his texts, and there is no text tone for him on
