SwiftKey and OnePlus have teamed up to give all OnePlus owners an exclusive pack of themes for free your keyboard! We have a total of four unique themes.
Received via pop up message on phone, not sure if compatible with all phones but you might want to give it a try, the black one is pretty good! :)
VIPTHEME NINJAPRO NINJATRY THANKYOU BONUS123 DIWALI15 (thanks to member comments below)