We've been hearing a lot of rumors about a new plastic iPhone due to arrive later this year, dubbed the "low-cost iPhone" by some, and a video posted by DetroitBORG on YouTube (via AmongTech) shows the new rear shell of the plastic iPhone, which is expected to replace the existing iPhone 4 and 4S models already on sale. In the video, Mike from DetroitBORG walks through the various features of the new rear shell and speculates on what features the new "low-cost iPhone" will have. While the shell appears to be essentially identical to one that leaked earlier this month, the video offers
