There's a battery indicator, battery percentage, alarm clock, location indicator, do not disturb, Bluetooth, & rotation lock. I think I covered them all. It should be all in your iPhone manual.
Looking at the iPhone Guide book and the different types of status icons (icons that appear on the top of area of the screen); I only see two phone icons. One is for call forwarding (phone handset icon with an arrow going to the right) and the other is for TTY (phone handset icon sitting on a bunch of little squares).
If you go to the app store and search under books; look for iPhone User Guide for iOS 9.2. One of these nice forum mods/helpers told me about it, and it's been extremely helpful.