The causes of plantar fasciitis are not entirely clear. Risk factors include overuse such as from long periods of standing, an increase in exercise, and obesity. It is also associated with inward rolling of the foot and a lifestyle that involves little exercise.
The Samsung Galaxy S4 is an Android smartphone produced by Samsung Electronics and was first shown publicly on March 14, 2013 at Samsung Mobile Unpacked in New York City.
[ Editor's note: Since this story was posted in November 2013, Knox has seen several major updates that have corrected many of the issues identified here. Learn about the newst Knox in our recent coverage. ] It was February 2013 when Samsung announced Knox, its containerization technology for higher-end Samsung Android devices.