The iPhone 4 will be available in black or white on June 24th. One of the biggest features of the new iPhone is video calling, thanks to its front camera. Apple calls it face time, and it works from iPhone 4 to iPhone 4 over Wi-Fi at least for 2010. Apple claims that this is the future and will be available over 3G. There will be two versions the 16GB for $199 and the 32GB for $299 if you are a new user or you are eligible for an upgrade.