Folks in the USA are experiencing some very cold weather this week — and so there are many media stories referencing "sub-zero" weather and the "polar vortex". And of smartphones failing in the cold…Source: NPRBeing no strangers to cold in Finland — we recently replicated our 2007 iPhone in a freezer experiment.YouTube: iPhone 5s in a FreezerDon't have an iPhone?Check out Ossi Jaaskelainen's article: Sub-Zero Weather: Can Your Smartphone Stand The Cold?