Consumers and business executives hoping to get their hands on a white model of the new iPhone 4 will have to wait until at least the second half of July.
In a statement, Apple said the manufacturing of the white models had “proven more challenging to manufacture than expected”.
Apple did not elaborate on why the white model was more challenging than the black model, which has not been affected.
Australian representatives for Apple had not responded to requests for more information on when the white models would be available locally. It has previously said the black models of the device would be hitting Australian shores in late July.
Apple CEO Steve Jobs first announced the fourth-generation iPhone during a keynote speech at the Worldwide Developers Conference in San Francisco in early June.
The smartphone will be priced at $US199 for a model with 16GB of storage and at $299 for a 32GB model, with two-year smartphone contracts.
The iPhone 4 will ship initially in the US, France, Germany, the UK and Japan. By the end of September, it will be available in 88 countries.
The new device and successor to the iPhone 3GS has a five megapixel camera with LED flash, 720p high definition video recording, A4 processor, a three-axis gyro – which can combine with the accelerometer to provide six-axis motion sensing such as up and down, side to side, forward and backward and pitch and roll.
Apple said the new FaceTime feature for video calling would be usable in any area with WiFi coverage, and utilises both the rear and new front camera. There was no mention of whether the feature could be used over 3G.
The device claims to be more durable, being built out of aluminosilcate glass and stainless steel, and has increased strength and scratch resistance. It is also thinner than its predecessor at 9.3 millimetres as opposed to 12.3 on the 3GS model.
The retina display is 3.5 inches at a resolution of 960 x 640 pixels (four times as many as the iPhone 3GS and 78 per cent of the pixels on the iPad), resulting in 326 pixels per inch and a clearer electronic display for text, images and video.
iPhone 4 houses iOS 4 which features folders, mail, enterprise support and Apple’s new iAd mobile advertising platform. It also provides users with multitasking, which allows switching between apps instantly while preserving the battery life.
Apple's total iPhone user base may reach as high as 100 million users by the end of 2011, according to Morgan Stanley analyst Katy Huberty. In a widely reported research note, Huberty expects to see about 42 million iPhones sold by the end of 2010 and that number could reach as high as 48 million, as reported in Fortune.
Huberty's prediction is bolstered, at least in part, by Apple's recent announcement that it sold 600,000 iPhone 4 devices during the first 24 hours the new smartphone was available for pre-order.