Display
iPhone4
• High-resolution Retina display
• 960-by-640 resolution
• 326 ppi
• Multi-Touch
iPhone3G
• 480-by-320 resolution
• 163 ppi
• Multi-Touch
Video Calling
iPhone4
FaceTime
Camera
iPhone4
5 megapixels
LED flash
Backside illumination sensor
Autofocus
Tap to focus
Front camera with VGA resolution
iPhone3G
3 megapixels
Autofocus
Tap to focus
Video
Recording
iPhone4
HD video recording
Tap to focus while recording
LED light
iPhone3G
VGA video recording
Tap to focus while recording
High
Technology
iPhone4
Multi-Touch
802.11b/g/n Wi-Fi3
GPS
Accelerometer
Three-axis gyro
Apple A4 chip
Dual-mic noise suppression
iPhone3Gs
Multi-Touch
802.11b/g Wi-Fi
GPS
Accelerometer
Battery Life4Talk time:
iPhone4
Up to 7 hours on 3G
Up to 14 hours on 2G (GSM model only)
Standby time:
Up to 300 hours
Internet use:
Up to 6 hours on 3G
Up to 10 hours on Wi-Fi
Audio playback:
Up to 40 hours
Video playback:
Up to 10 hours
iPhone3Gs
Talk time:
Up to 5 hours on 3G
Up to 12 hours on 2G
Standby time:
Up to 300 hours
Internet use:
Up to 5 hours on 3G
Up to 9 hours on Wi-Fi
Audio playback:
Up to 30 hours
Video playback:
Up to 10 hours
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