Those of us who've left a cell phone outside in Winter have discovered the phone goes on the fritz. Fortunately it's usually only temporary and they recover once warmed. This got us thinking. In our on-going mission to improve not only bridge knowledge, but bigger questions, we did some research. Phones are designed to operate at their best between 32-95F. That means Minnesota might as well forget outside calls until May. Most phones will operate a little until -10F.
BUT!! Those of us who still have outdated flip phones, take note! Our phones have worked in temperatures down to -314F. Those of you who laugh at our flip phones will be begging to use them when we get to Mars. Just don't use up all our minutes phoning home.