Windows Phone 8.1 arrived last year, finally bringing many features lacking from Microsoft's platform. Now, Microsoft is on the verge of rebooting once again with Windows 10 Mobile. Windows Phone has been rebooted enough. With constant Windows Phone change, the only thing that has remained persistent is a lack of apps.
Part of the Electronics glossary: The dielectric constant is the ratio of the permittivity of a substance to the permittivity of free space. It is an expression of the extent to which a material concentrates electric flux, and is the electrical equivalent of relative magnetic permeability.
Dielectric constant, property of an electrical insulating material (a dielectric) equal to the ratio of the capacitance of a capacitor filled with the given material to the capacitance of an identical capacitor in a vacuum without the dielectric material.