The iPhone 6 may include larger memory capacities to match its larger screen. Reuters

A larger display not be the only big feature on the upcoming iPhone 6 by Apple Inc. (NASDAQ: AAPL) as; the smartphone may also include a significant memory upgrade.

The Chinese Apple repair firm GeekBar shared documents on Thursday it claims includes hardware schematics for the iPhone 6. The iPhone 6 may be available in a 128GB internal memory option, according to the firm, with Apple also offering the iPhone 6 in 16GB, 64GB memory options. Notably, the documents do not indicate a 32GB storage options for the iPhone 6; 32GB internal memory is usually one of three storage options offered on iPhone models.

Prior rumors suggest that Apple may release a super exclusive and expensive version of the iPhone 6, which may include 128GB of internal memory. The iPhone 6 is expected to feature a 4.7-inch display, but it is believed Apple may also release an iPhone model with a 5.5-inch display. Rumors suggest this model. This model may be called the iPhone 6L and may include the 128GB memory option.

Tech website MacRumors notes that the first Apple device to include 128GB of internal memory was the fourth-generation iPad, which released in early 2013. Thus far no iPhones have included more than 64GB of internal memory.

Apple implementing more memory into a new iPhone model could indicate the Cupertino, California-based company wants to establish new, higher price points for the iPhone. Larger memory capacities can increase the price of an iPhone by $50 to $100. The current iPhone 5s for example starts at $199 on-contract for the 16GB model, while the 32GB model costs $299 and the 64GB model costs $399. Price points for the upcoming iPhone models are not yet known but analysts believe that the iPhone could sell for around $700 without a contract.

With Apple expected to unveil the iPhone 6 at a media event on Sept. 9, there are still a few weeks before any features can be confirmed.