A report from DigiTimes today shows that Apple will add to its manufacturing partnership with Foxconn and use an arm of Asus to manufacture the upcoming iPhone.

The report states that Pegatron Technology has been selected by Apple and will manufacture the next-generation iPhone alongside Foxconn.

The next iPhone is expected to be released along Apple’s normal timeframe around June time and the addition of another manufacturer could suggest that Apple is looking to increase output. Along the same lines Pegatron expects handset shipments to “grow substantially in 2010″.

In separate news with the release of a new iPhone SDK yesterday alongside the iPhone OS update revealed that Apple has begun referring to the next iPhone as “N89″. A contrast to a report that suggested the iPhone was referred to as “N90″.