If still no sound, does this happen with all SMS/MMS text messages and iMessages, or only some? Also, have you checked to ensure no Focus settings are impeding the notifications from coming through? More on that can be found here.
If still no sound, does this happen with all SMS/MMS text messages and iMessages, or only some? Also, have you checked to ensure no Focus settings are impeding the notifications from coming through? More on that can be found here.