Apple's Far East manufacturers are battling to become the second partner for a new breed of iPhone, a report suggests.

DigiTimes claims Inventec and Quanta are vying to secure the contract to join Foxconn Electronics in iPhone manufacture. Foxconn is currently the exclusive manufacturer of the device.

The report suggests a new version of the iPhone is being developed for the European market: "Orders have been split with Quanta for the European version. The firm also noted that Foxconn, Inventec and Quanta are all bidding for the Asian version of the iPhone."

Quanta is understood to be "aggressively" working to become an iPhone manufacturing partner. It already plans to set aside corporate resources to assess potential iPhone orders, the report claims.

Foxconn is understood to have made major investments in its iPhone assembly infrastructure, but, "Apple may still choose to outsource a small portion of iPhone assembly to manufacturers other than Foxconn, in order to lessen its exposure to one partner and lower its market risk," the report adds.