Apple MC610LL/A iPhone-4 32GB AT&T GSM Smartphone Black (Pre-owned)

* Cellular Provider ATT
* Capacity 32GB
* Color Black
* UMTS/HSDPA/HSUPA (850, 900, 1900, 2100 MHz)
* GSM/EDGE (850, 900, 1800, 1900 MHz)
* 802.11b/g/n Wi-Fi (802.11n 2.4GHz only)
* Bluetooth 2.1 + EDR wireless technology
Location
* Assisted GPS
* Digital compass
* Wi-Fi
* Cellular
Power and battery
* Built-in rechargeable lithium-ion battery
* Charging via USB to computer system or power adapter
* Talk time:
* Up to 7 hours on 3G
* Up to 14 hours on 2G
* Standby time: Up to 300 hours
* Internet use:
* Up to 6 hours on 3G
* Up to 10 hours on Wi-Fi
* Video playback: Up to 10 hours vAudio playback: Up to 40 hours
Mac system requirements
* Mac computer with USB 2.0 port
* Mac OS X v10.5.8 or later
* iTunes 9.2 or later (free download from www.itunes.com/download)
* iTunes Store account
* Internet access
Windows system requirements
* PC with USB 2.0 port
* Windows 7 Windows Vista or Windows XP Home or Professional with Service Pack 3 or later
* iTunes 9.2 or later (free download from www.itunes.com/download)
* iTunes Store account
* Internet access
Environmental requirements
* Operating temperature: 32 to 95 F (0 to 35 C)
* Nonoperating temperature: -4 to 113 F (-20 to 45 C)
* Relative humidity: 5% to 95% noncondensing
* Maximum operating altitude: 10,000 feet (3000 m)
Display
* Retina display
* 3.5-inch (diagonal) widescreen Multi-Touch display
* 960-by-640-pixel resolution at 326 ppi
* 800:1 contrast ratio (typical)
* 500 cd/m2 max brightness (typical)
* Fingerprint-resistant oleophobic coating on front and back
* Support for display of multiple languages and characters simultaneously
Audio playback
* Frequency response: 20Hz to 20,000Hz
* Audio formats supported: AAC (8 to 320 Kbps), Protected AAC (from iTunes Store), HE-AAC, MP3 (8 to 320 Kbps), MP3 VBR, Audible (formats 2, 3, 4, Audible Enhanced Audio, AAX, and AAX+), Apple Lossless, AIFF, and WAV
* User-configurable maximum volume limit
TV and video
* Video formats supported: H.264 video up to 720p, 30 frames per second, Main Profile level 3.1 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats MPEG-4 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps per channel, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format
* Support for 1024 by 768 pixels with Dock Connector to VGA Adapter 576p and 480p with Apple Component AV Cable 576i and 480i with Apple Composite AV Cable (cables sold separately)
Camera, photos, and video
* Video recording, HD (720p) up to 30 frames per second with audio
* 5-megapixel still camera
* VGA-quality photos and video at up to 30 frames per second with the front camera
* Tap to focus video or still images
* LED flash
* Photo and video geotagging
Sensors
* Three-axis gyro
* Accelerometer
* Proximity sensor
* Ambient light sensor
Rating for Hearing Aids
* 3G network - 850/1900MHz: M4, T4
* 2G network - 850MHz: M3, T3
* 2G network - 1900MHz: M2, T3