DetroitBORG on YouTube somehow managed to get his hands on the back of what is supposedly an upcoming low-cost iPhone. The back, made entirely from plastic, does appear to be legitimate.
This low-cost device is supposedly going to be unveiled in conjunction with the iPhone 5S. Apple’s iPhone lineup for the next year would then presumably be an iPhone 5S on the high-end, and then this device on the low-end. The iPhone 5 could also potentially stick around and be available as a mid-tier device.