You Can Try The iOS 9.1 Beta
If you're interested in the new emojis and iOS 9.1, you can try the update right now.
The iOS 9.1 update is currently in the developer and public beta which means you have a couple of different options at your disposal.
If you do decide to download the iOS 9.1 beta, remember that there are various rules that you need to follow. There's also a potential for problems. Beta means early software and betas aren't for everyone.