File format: vector EPS and AI format;
File size: 500 KB;
These mobile device mockups  were created by Eric Miller who’s from Brooklyn, NY

Editable AI (CS6) files
Editable EPS (AI 10 compatible) files
OmniGraffle Stencil
A free collection of phones and tablets for product mockups.
iphone 5s, iphone 5c, iphone 4s,google Nexus 5
HTC One HTC One Mini,Samsung Galaxy S4, Samsung Galaxy Note 3
Motorola Droid Razr Maxx HD, Motorola Moto X, LG G2 , Nokia Lumia 520
Tablets
ipad mini, iPad Air
iPad 2, Google Nexus 7
Amazon Kindle Fire HDX 8.9″
Microsoft Surface Pro 2
License: click here
You can grab the resource from link.  Hope you guys find it some use for your works.