I have good news and bad news. The good news is that you can enable the emoji keyboard and send new emojis to devices capable of displaying them. The bad news is that the tweak is still a work in progress, and as such, the new emoji don’t display properly in all apps.
Some apps will work fine, such as Mail, but other apps, like Messages, won’t properly display the new emoji. Developer PoomSmart says that he is working on a fix for the issue, so eventually, we may have a 100% fully working iOS 9 emoji package for iOS 9.1.
Add PoomSmart’s repo to your Cydia Sources
Step 1: Open Cydia
Step 2: Tap Sources
Step 3: Tap Edit
Step 4: Tap Add
Step 5: Paste the following source: http://poomsmart.github.io/repo/
Step 6: Tap Add Source
Install the emoji file
Step 1: Open Cydia
Step 2: Tap Search
Step 3: Type Emoji iOS and tap on the Emoji iOS 9 Backup (D) search result
Step 4: Tap Install
Step 5: Tap Confirm and be patient, because the emoji font file is fairly large
Step 6: Once the download and installation is completed, tap Return to Cydia
Step 7: Press the Home button to go to the Home screen and open BytaFont 2
Step 8: Tap Emoji
Step 9: Tap Emoji_iOS 9.1
Step 10: Tap Yes to respring.