This is my modification design from the basic iphone 6 case made by hangsta http://www.thingiverse.com/thing:471548

The case hold the phone a bit more hard.
And i made the case 0.20 mm higher then the phone screen

I succesfully print this at the first try in ABS without brim and with support struts.
Printed at 230C with hotplate at 85C, Cooling Fan OFF
40mm/s and 0.15mm layer