Apple launched awesome device when all the brands working on same technology in market, on that time apple launched a beast for mobile technology and named iPhone 4. what a phone really i personally use it and i am still love it its two years ago i purchase it from apple store.
Featuures
iPhone 4 have 2G or 3g both networks, Body dimension is 115.2 x 58.6 x 9.3 mm and only 127 gram. iPhone 4 has touchscreen 640 x 960 pixels, 3.5 inches (~330 ppi pixel density). 8/16/32 GB storage, 512 MB RAM internal storage. iPhone 4 running on iPhone OS 4 and also upgradable on OS 5. 
