The MTA is apparently well into the middle phase of its project to wire 279 below-ground subway stations with cell reception, but as Citylab recently put it, "there are still places you can’t make a call to save your life.” Into this unfortunate void comes the Subspotting project, brainchild of Daniel Goddemeyer and Dominikus Baur, which offers maps "illustrating the unequal geography of subway reception" and helpfully providing information on where you'll be able to make a call or send a text while in transit. In addition to system and individual line maps, there's an app that shows the quality of reception as different sized bars at each station, and MTA-sanctioned posters.
Can you hear me now?