Can trade in my 4s with Apple Care

Lately I've been having probelms with my iPhone 4s. I bought it in July of last year. The problems include: my lock button is jambed, the phone thinks that I have headphones in when I don't, and applications such as Camera and Safari constantly crash. The screen also does not always respond when I touch it and it does not ring or vibrate when I recieve calls sometimes (I did check to see if my ringer was on, along with vibrating in Sounds under Settings). I have Apple Care+. Can I trade it in for a refurbished phone? Also, for an extra fee would I be able to trade it in for a refurbished iPhone 5?