Default Dialer and contact

I removed by mistake dialer and contact app on my oneplus.
How can I restore it?
Thanks

Inviato dal mio A0001 con Tapatalk 4
Optimus 2x (P990) - ROM: [4.4.4] CM11 (07/16) by tonyp - Kernel:Kowalski kernel-stable: M1(2.6.39.4) by pengus77 - Bb: v30A