Preview at WWDC likely in June, followed by September launch.
Apple to Move Production of iPhone Batteries to Automated Lines
Apple has already automated its Mac Pro and iMac production lines. Other than materials and final assembly, manpower is not required for the rest of the manufacturing.The move will likely help Apple with iPhone production going forward, as company supplier Pegatron will reportedly be starting production on the iPhone 6 in the second quarter of this year at its new Kunsahn, China plant. Moving the production of iPhone batteries to automated lines may also help Apple avoid manufacturing defects like ones found in a small number of iPhone 5s last year.
Apple's next-generation iPhone will likely be unveiled in the fall, and has been rumored to launch with two different models including one with a 4.7-inch display and one with a 5.7-inch display. The iPhone 6 could also feature a durable sapphire display, with other rumors pointing to a thinner chassis and bezel-free design.