NEW YORK (TheStreet) -- The next Apple (AAPL) iPhones may come with a new feature able to sense how hard users are pressing on a screen in order to perform different functions.

Apple suppliers have reportedly started production of new iPhones in 4.7-inch and 5.5-inch sizes with "Force Touch," according to a report by Bloomberg, which cited people with knowledge of the matter. The feature was already revealed for the Apple Watch and the new 12-inch MacBook.

The technology, which lets users make various adjustments to the strength of their taps on the screen in order to perform different functions on the device, is expected to be incorporated on all next-generation models of the smartphone. The sources said volume manufacturing is expected to increase as soon as next month.

However, despite expectations that Apple is keeping its newest iPhones the same sizes and similar designs as the previous generation, the incorporation of Force Touch could affect the supply and display assembly yields, according to the sources. If so, that could potentially lead to impacts on timing and production volume of the phones.

Apple is expected to unveil its newest iPhones in September. There is speculation that the new phones will be called the iPhone 6S and iPhone 6S Plus, if the company continues the naming pattern it's carried out in previous generations. The company is reportedly making the move to stay competitive with rivals like Samsung, which recently introduced a Galaxy smartphone which allows its screen to be viewed from the side.

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