With activation of new voice and data plans, AT&T Wireless offers the refurbished Apple iPhone 4 16GB Smartphone for AT&T Wireless in Black for $99.99 with free shipping and free activation. (Search for "refurb iPhone 4 16GB" to find it.) That's tied with our mention from a month ago and $170 less than the lowest total price we could find for a a used unit. (However, we did see this refurb for $50 on Black Friday.) Sales tax is added where applicable. It features an Apple A4 processor, 326-ppi (pixel per inch) Retina 3.5" display running at 960x640, gyroscope, front- and rear-facing cameras, 5-megapixel camera with LED flash, 720p video capture at 30 fps, 802.11n wireless networking, dual microphones, and more. A 90-day AT&T warranty applies.