iPhone 4 technical specifications
In the box
Frequency response: 20Hz to 20,000Hz
Impedance: 32ohms
- Dock connector to USB cable
- USB power adaptor
- Documentation
Size & weight
The iPhone 4′s look can be described in one word: stylish , noticeably slimmer measuring 0.37 inch deep. The overall design screams elegance
Power and battery
- Built-in rechargeable lithium-ion battery
- Charging via USB to computer system or power adaptor
- Talk time:
Up to 7 hours on 3G
Up to 14 hours on 2G
- Stand by time: Upto300hours
- Audio playback: Upto40hours
- Video playback: Upto10hours
- Internet use:
Up to 10 hours on wifi
Up to 6 hours on 3G
Display
•800:1 contrast ratio (typical)
• Retina display
•3.5-inch (diagonal) widescreen Multi-Touch display
•Support for display of multiple languages & characters simultaneously
•960×640- pixel resolution at 326ppi
•Fingerprint-resistant oleophobic coating on front & back
•500cd/m2 max brightness (typical)
Of course, the iPhone 4 isn’t just about cosmetic enhancements, pleasing as they are. What makes this phone such a technological improvement is what’s inside the handset.
the iPhone 4 has a 3.5-inch display. But the new phone’s screen doubles the resolution to a 960-by-640-pixel IPS display. At 326 pixels per inch, this is the highest resolution available on a phone to date.
Color and Capacity
•White or black
•16GBor32GB flash drive
Cellular &wireless
•Bluetooth2.1+EDRwireless Technology
•GSM/EDGE (850, 900, 1800, 1900MHz)
•UMTS/HSDPA/HSUPA (850, 900, 1900, 2100MHz)
•802.11b/g/nwifi (802.11n 2.4GHzonly)
System requirements
•Windows 7; Windows Vista; or Windows XP Home or Professional with Service Pack 3 or later
•Mac OS X 10.5.8 or later
•Mac computer with USB2.0 port
•Internet access
•iTunes Store account
•iTunes 9.2 or later






Valuable info provided I am really pleased to go through this article..thanks with regard to giving us nice tips.Excellent walk-through. I appreciate this write-up.