Are you ready for an upgrade yet? If so, Apple has announced in San Francisco yesterday that the new iPhone 4G will be available throughout the U.S.A, the U.K, Germany, France and Japan on Thursday 24^th June. The device will then be released worldwide in an additional 88 countries by September 2010. At least now you know when you will be able to get your hands on one.

Steve Jobs announced Apple’s latest creation, previously dubbed the iPhone HD, at the Apple WWDC (Worldwide Developer Conference), the company’s annual bash for budding games and app developers.

The new iPhone 4G comes complete with cameras positioned in the front and back of the device, a 5 megapixel camera with flash, a gyroscope to replace the accelerometer and a host of other must have features.

Similarly to the release of the iPad and previous-generation iPhones, eager customers cam expect the lines to be full of would-be buyers. Camp out or wait a couple days — the choice is yours.

The iPhone 4 will be available on June 24th in both black and white, either with 16 GB of storage ($199) or 32 GB ($299) with a 2-year contract. O2, Vodafone and Orange may decide to grant early upgrade dates to some iPhone buyers, so if you’re a current 3G or 3GS owner, be sure and check your account website to see if you’re eligible.

Let us know what you think of the new iPhone 4G…