Follow these instructions in order to enable a Hotspot on the iPhone 6/6s
1) Go to the Home Screen of your iPhone (The main screen when you press the round button on the lower part of the screen)
2) Once in the Home Screen, tap "Settings"
3) Once in "Settings," tap "Personal Hotspot"
4) Once in "Personal Hotspot," toggle "Personal Hotspot"
5) Once "Personal Hotspot" has been toggled, it will turn green. At this point, tap the space next to the "Wi-Fi Password" and create a password that you would like to use. This will be the password that you will use when trying to connect to the Hotspot.