Don't Install iOS 9.1 Beta If You Own One Device
If you only own one device, you probably don't want to install the iOS 9.1 beta update.
iOS 9.1 and its emojis are tempting but the update is called "beta" for a reason. It's early software and it has the potential to cause problems.
If you only have one phone or tablet, and you rely extensively on that phone or tablet, iOS 9.1 is an extremely risky proposition with a public release this close.