Apple's upstream suppliers have begun shipping components for next-generation iPhones recently and Pegatron Technology is estimated to have landed half of the orders for the 4.7-inch model, indicating that Pegatron may supply 25 million of the estimated 50 million 4.7-inch next-generation iPhones shipped before the end of 2014, according to sources from the upstream supply chain.

However, makers believed to be in the new iPhone supply chain have declined to comment.

Apple is said to be unveiling its next-generation iPhones on September 9 and the 4.7-inch model is scheduled to enter mass shipments in October.

Previously, Foxconn Electronics (Hon Hai Precision Industry) was said to have landed all of Apple's new 5.5-inch model orders and 70% of the 4.7-inch model's orders. However, the latest development shows that the orders for the 4.7-inch models are split evenly between Pegatron and Foxconn, the sources said.

The sources also pointed out that Pegatron's relationship with Apple has grown tighter recently.

With the strong orders from Apple, Pegatron is expected to see impressive results in the fourth quarter. Currently, Apple's orders contribute 35-40% of the company's revenues, the sources said.