Maybe the companies offering it for sale knew more about it than the rest of us, because it looks like the much-delayed white iPhone 4 is about to head our way. Saying that, we're not holding out collective breaths.After all, recent iPhone 5 rumours point to a new design that will replace the back of the existing handset, making it easier to change the colour of the smartphone. With that in mind, is it really worth releasing a white handset so soon before the new design lands? According to one industry analyst it is. Apple Insider quotes Concord Securities Analyst Ming-Chi Kuo, who in turn claims that manufacturers will initiate production of the iPhone 4 with 'white enclosures', dispatching them to Apple ahead of general availability, which is planned for next month. That should give you around six weeks of use before the new model is launched.So why now? Well, according to that same analyst, Apple has made changes to the 'film material to solve the full-lamination problem that [was] the reason why white iPhones [were] delayed.' That backs up previous stories of Apple developing a new material that would allow it to successfully manufacture a white iPhone 4 that meets the company's high level of standards. Previous methods resulted in a high number of defective handsets, hence the delay. The new material apparently allows for greater control and precision in setting the thickness of the paint layer.So look out for it soon, which will hopefully be followed by a white iPhone 5 on the day of launch. After all, Apple has managed it with the iPad 2.