I never seek anything being retired. Don't use the cell phone much. Since time began rats, ants, and other insects have a freedom that most of the animal kingdom including humanity has never understood. So a large Part of the animal life on the planet goes the way of never more. So as for invisibility goes look no further than the homeless and poor as well as the millions of people lost to human's with money that buy them for there "Zoo's". Besides the humans who actually try to be invisible making a wage for family and never want to be seen so they can hide in plain sight. So as for invisibility try speaking to those millions around the world.