The Nokia Lumia 820 is a snappy, mid-range smartphone that delivers high-end performance in a compact package.

ENGADGET: Nokia Lumia 920 and 820 land stateside on AT&T's 4G LTE network this November

Doing so requires development of countless shapes and sizes of packages, high-performance materials, new graphic capabilities, convenience features and package formats in even shorter production cycles.

FORBES: Written by Jack Knott