major screen Draft phone views in the margin of your layouts. Lay out just one and sit very close to the coders. Wireframe the phone, then mock up the desktop.* Drew Clemens, Smashing Magazine. http:/ /uxdesign.smashingmagazine.com/2012/05/30/ design-process-responsive-age/
Test. 5-7 devices you plan to fully support and test thoroughly. Support. About 15 devices you will strategically support but will not test. If someone reposts an issue, you’ll look into it.