iPhone outsells the Apple iPad

Apple’s iPhone 4 launch has been its most successful ever, shifting 1.7m units worldwide by Saturday, the company said.

Sales of the touchscreen smartphone, which competes with devices from Nokia, Research In Motion and Motorola, surpassed some analysts’' expectations, as well as those of Apple itself, which has been having trouble keeping up with demand.

In a statement, chief executive Steve Jobs apologised to “customers who were turned away” because the company did not have enough supplies of the iPhone 4.