Hello Lexter_1985,
Welcome to Apple Support Communities!
If we understand your post correctly, you want to know how to unmute text message notifications on your phone. We'd like to help!
Check tp make sure that the silent button on the side of your phone isn't muted.
Next, try these steps below for help with the sounds for notifications.
Set the alert sound for messages
Go to Settings > Sounds & Haptics (on supported models) or Sounds (other models).
Tap Text Tone, then do one of the following:
Tap Vibration, then choose an option.
Tap a sound below Alert Tones.
Tap Tone Store to download an alert sound from the iTunes Store.
See Change iPhone sounds and vibrations.
More information can be found here: Change message notifications on iPhone
Let us know if you have any questions.
Thank you for using Apple Support Communities.
Take care!