The DashMount's cradle arms extend up to 3.5?, allowing the mount to accommodate the ever growing phone sizes in today's market. It?s not always easy finding a mount that will hold the iPhone 6s Plus. With this universal window/dash mount for smartphones,, that is the least of your worries. The window/dash mount suctions to nearly any surface with the suction cup. The StickGrip suction cup creates a secure hold on windows and textured dashboards so you can mount your device wherever you want it. If the StickGrip ever loses it's grip, simply rinse the suction cup off with lukewarm water, shake and let air dry.