DO NOT DISTURB can be inadvertently set for individual text thread!!
Hello all,
I've just registered here for the singular purpose of sharing what I've just discovered regarding MY problem with not receiving alert tones when I've received a text.
Yes, yes...I know...the DO NOT DISTURB issue has been raised before and it didn't resolve the problem for everyone. Well, as I read this thread and discovered, one by one, that the solutions kindly suggested by other members did not work for me either, I looked more closely at my text messages listing of text "senders".
Try this. Go to your messages and look at the individual text threads you've received from various individuals. You may find that one or more of those threads have the "quarter moon" icon listed just to the left of the "senders" name. Aha! If that is what you find, then tap on that sender's name and then select "details". You will then see the DO NOT DISTURB selection half way down the screen has somehow been activated EVEN THOUGH, your "global" DO NOT DISTURB icon was NOT!!!
Turn off that individual DND and that may just fix your problem with not receiving sound alerts for your incoming texts. Repeat the process for any other inadvertent DND'd message senders.
p.s. - this works with iPhone 5s but I don't know if it will work with older iphones, although, I would imagine with the most recent update to 8.0.2 OS that it might work on other compatible iphones.