Revamped version of the iPhone 3G with faster processing speeds. Repair of this device is similar to the 3G, and requires simple screwdrivers and prying tools. Model A1303 / 8, 16 or 32 GB capacity / black or white plastic back.
You need to open up and check if any of the contact points for the home button are broken. If they are, you will need a new home button. Also, it may have damaged the dock connector so check these out and let me know.