Glitches on new 6s

[superchick]

Just got a new 6s three days ago. I'm already seeing a few things that concern me. For instance, when I push the home button to wake up the phone, it appears to freeze up for a noticeable split second while going to the home page. Also, siri is not near as responsive as it was on my old 5s. It no longer responds when you push the home button like it used to (I guess that's a new feature?) which is fine, but when I speak, it still doesn't respond. It does this about 1/2 the time. When I use Siri to text or call someone, most of the time, it says that there's no number for that person. Any suggestion?