Apple 4 will be available for a pre-order from June 15 and shipping will start from June 24, to 5 countries US, UK, Japan, Germany and France. Existing AT&T iPhone users can upgrade to iPhone 4. The latest price of iPhone 3GS in India is for 36000 16GB and 41000 for 32GB model. So when iPhone 4 is launched in India, it would cost around 38000-45000INR.

Improved performance; lovely new display and an improved design; adds a ton of sorely needed features, both by itself and through the iOS 4 update.
Apple A4 Chip
upto 32GB internal memory
microSIM Card
Bigger Battery
5 Megapixel Camera with LED Flash and 5x zoom and tap to focus
HD video Recording
Video Calling Camera
WiFi (n)
Video Editing with iMovie
Bluetooth
practically unlimited entries and fields, Photocall
100 received, dialed and missed calls
16/32 GB storage, 512 MB RAM
No