The iPhone 6s was launched in September 2015 and was introduced in a new color, rose gold. You can tell if you have a 6s by flipping your phone over--the 6s has a S in a box on the back of your phone.
If there's just lint in your charging port, causing your phone to not charge, we can clean it out for free. Don't try this at home as you may damage your port--we use specialized tools. If that doesn't fix it, a charge port replacement takes about 30 minutes. There is a 10% discount if you get your screen and charge port replaced at the same time.