Please be advised that this "GSM" A1428 iPhone 5 model, which supports LTE bands 4 and 17, was specifically designed for the North American market, including carriers like AT&T in the US, Bell, Rogers, Telus and their affiliates in Canada, and Telcel in Mexico.
All iPhone 5 models, irrespective of network compatibility, feature a 4-inch (diagonal) widescreen multi-touch IPS LED-backlit "retina display" with an 1136x640 resolution (326 ppi). They are equipped with dual cameras: a rear 8-megapixel, 1080p "iSight" camera and a front 1.2-megapixel, 720p "FaceTime HD" camera. The device supports 4G/LTE and is housed in a slim, 0.30-inch aluminum "unibody" case with a glass front, available in either dark gray "slate" with a black front or silver with a white front.
Each iPhone 5 is powered by a 1.3 GHz dual-core "Apple A6" processor, contains 1 GB of RAM, and offers 16 GB, 32 GB, or 64 GB of flash storage. It also features dual-band 2.4 GHz and 5 GHz 802.11n Wi-Fi, Bluetooth 4.0, three noise-canceling microphones, a bottom-mounted headphone jack, and the new USB 2.0-based Lightning port for connectivity.
Apple's battery life estimates for the iPhone 5 models are up to 40 hours of audio playback, 8 hours of 3G talk time, 8 hours of 3G internet use, 8 hours of 4G/LTE internet use, 10 hours of Wi-Fi internet use, 10 hours of video playback, and 225 hours of standby.
In the US, this "GSM" A1428 iPhone 5 was available locked to and subsidized by AT&T in 16 GB, 32 GB, and 64 GB storage options for US$199, US$299, and US$399, respectively, with a two-year contract. It was also sold unlocked and contract-free for a higher price.
As initially reported by Engadget, this A1428 iPhone 5 model was phased out beginning March 26, 2013. A revised A1428 model with added AWS (1700/2100 MHz) support was sold starting April 12, 2013, which EveryiPhone.com documents as a distinct model for clarity.