On my iPhone 6s+ there is no sound or vibration on incoming text messages and no vibrations on any other App except if I manually put it on. I have reset it backto factory settings via my mac and the phone itself. but its still not working. I can hear the iPhone if there's a phone call for me , infact all sounds are ok except on my texts . I wonder if someone can help me ? I'm not certain if a trip to apple is needed or what, because as I say every other sound is ok . Vwey Strange.