Messages app notification sounds are not working in iOS 27.2

The iPhone model is an important piece of information that you have not provided, as I need to know whether your device has a traditional Ring/Silent switch or an Action button.

These two controls operate differently when it comes to enabling or disabling the ringer and managing sound and alerts.

• Ring/Silent switch: On iPhone models equipped with this physical switch, you can toggle between Ring mode and Silent mode by moving the switch. The orange indicator shows that Silent mode is enabled.
• Action button: On iPhone models with an Action button, its behaviour depends on how it has been configured in Settings. By default, it toggles between Ring and Silent modes, but it can also be assigned to other functions.

Therefore, please specify your exact iPhone model. This will help me provide accurate instructions relevant to your device rather than suggesting steps that may not apply to it.

shawnm13 wrote:

1. IOS 27.2 notification sounds

Not every issue an individual encounters on their device can be attributed to an iOS update. iOS 27 or later may have coincided with what you are experiencing, but that does not mean the issue was triggered by iOS. Coincidence in timing is not, by itself, evidence of causation.

If the update itself were the root cause, then every device running that same version of iOS would exhibit the identical problem. In such a scenario, the forums would be flooded with countless posts reporting the same malfunction, creating an unmistakable wave of complaints that no one could possibly overlook.

The absence of such widespread reports strongly indicates that the issue is not a general, system-wide problem with iOS 27 or later, but rather something specific to the individual device, its configuration, installed apps, settings, hardware, or another interacting factor.

In short: iOS 27 or later may be a coincidence in timing, but there is no basis to conclude that iOS itself triggered the problem simply because the issue appeared after the update.

See what each update does: About iOS 27 Updates, About iOS 26 Updates, About iOS 18 Updates, About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...

Probably you have not checked hide alerts.

SMS and iMessage notifications settings are not different. However. please check if you have enabled Hide Alerts for a specific message thread.

Hide Alerts watch the GIF below

You may get better and prompt responses if you may kindly provide the iPhone Model that you have and the iOS version if it is known to you and re-post.

With the limited information that you have provided, It is hard to even guess the problems faced by you. 

You may get faster and better responses to your query by --> Writing an effective Apple Support Commun… - Apple ...

Please re-post with detail so that someone else can help.

shawnm13 wrote:

2. The phone is not on silent/vibrate.

Silent/Vibration can be turned on and off under Settings.

Check this, first.

Or Use and customize the Action button on iPhone - Apple Support (IN)