Apple plans on selling white versions of the iPhone 4 by the end of this month, after a delay of almost 10 months, according to sources on Business Week.

This long postponement was said to be caused by issues with the phone’s housing paint. Phil Schiller, the senior vice president of worldwide product marketing at Apple, had confirmed in the previous month that the white version of the iPhone 4 would be available this spring.

 The iPhone 4 still has an impressive sales record, but adding the white version to the sales “counter” could be the catalyst for another growth in demand. Apple announced a delay of the white version right after the iPhone launch in June 2010, mentioning some manufacturing difficulties.   

White seems to be a generic colour for Apple’s gadgets, starting with the first iPod, back in 2001. The iPhone 3GS model and iPad 2 started selling with the same colour; that’s why the white version of iPhone 4 should increase revenue even more.

The iPhone remains Apple’s top selling product, gathering 39 per cent of total sales in fiscal Q1. Fresh data is expected next week, on April 20th, when the California based company will report its Q2 financial results.

Apple has continued its constant financial growth, registering a 4.2% increase in share price since the beginning of the year.