Not getting iPhone Message Tweets

Factual Questions
1

Yes, I have Googled the problem thoroughly and made sure that all of my settings are as they should be.

  1. In “Sounds and Heptics” I have chosen “tweet” for my text tone.
  2. I have “do not disturb” turned OFF.
  3. If I go to “notifications” and then go to “messages”, I have “allow notifications” turned on. The sound is listed as “tweet” I have “show on locked screen”. I have “show in history”. I have "show as banners (persistent).

There isn’t anything else I can do in terms of saying, “Yes, damn it, notify me when I get a message!”

So, why am I greeted with silence even when a message is sent?

Other people say they have the same problem, but that there is seemingly no solution. Are they right?

2

To be sure, have you previewed the “tweet” sound when choosing it? It exists and works on your phone?

3

Good question. Yes, I did, and it sounds loud and clear.

4

Go to a message from a contact where you haven’t heard the sound. Tap the circled “i” at the top right of the screen. Is the “Hide Alerts” toggled on or off?

5

Is your ringer on with the loudness at a reasonable level? Volume and ringer are two different things, and it drives me crazy with some applications that use the ringer for sound. I usually keep the ringer switch off.