According to AppleInsider, the company plans to introduce advanced 3D Touch Technology with the next generation iPhone. Coupled with an OLED planel, the technology will be located underneath the arrangement. This new technology is said to include enhanced sensitivity compared to what is currently available.
To learn more about his new technology, read the article linked below
Full article: http://appleinsider.com/articles/17/01/21/apple-to-adopt-new-3d-touch-technology-for-oled-iphone
