Phone Pro – Promo Realistic Mockup Mobile Application
https://elements.envato.com/phone-pro-promo-realistic-mockup-mobile-applicatio-SPLJ5GL
Free 
Silky – Phone Promo Mockup Mobile Application
https://elements.envato.com/silky-phone-promo-mockup-mobile-application-SZBKHTR
Free 
Glass Phone – App Promo Phone Mockup
https://elements.envato.com/glass-phone-app-promo-phone-mockup-AAKZ38J
Free