NASA has finished listening for the Phoenix Mars Lander, reports Spaceflight Now in *this article*.
It comes due to the Martian Winter fast approaching, the solar panels are unable to keep the batteries charge…. and it is a little tricky to send someone to run a generator or change the batteries. 😉
In a sense it is sad to lose a spacecraft, but Phoenix had done what it was supposed to do, and was operational for 2 months longer than its original 3 months mission. Not bad at all. The Odyssey orbiter appears to continue functioning, so not all is over yet, even if we are unlikely to hear it for some time while Mars passes behind the Sun (from our perspective).