One of Apple's primary assembly partners has announced that it will increase its Chinese workforce by 40 percent, hiring 40,000 more workers during the second half of the year to help meet demand for the forthcoming (but unannounced) "low-cost" iPhone model. The alleged new model, which is thought to be debuting later in the year, would be aimed at lower-income buyers in developing markets such as China and India but could be sold elsewhere. Sources say small scale production of the phone has already started, with a ramp-up beginning in June.