On 8 June 2009, the marketing chief Phil Schiller as part of the Apple Worldwide Developers Conference before the iPhone 3G. The S in the model designation of the iPhone stood for "Speed" (German speed). The processing speed and Internet connection was faster than its predecessor model. Differences of the iPhone 3G compared to the iPhone 3G are HSDPA up to 7.2 Mbit / s instead of 3.6 Mbit / s (see reports from March 2009 [19]); camera with 3 megapixel resolution instead of two formerly megapixel resolution (see reports from April 2009 [20]), a video recording and video editing function [21] (see also reports from April 2009 [20]), a 32-gigabyte version instead of the previous maximum of 16 gigabytes, [22 ] extended battery life, has a magnetometer (digital compass) [23] According to experts, the semiconductor industry, given Apple's digital 3-megapixel camera sensors for the company OmniVision mission; better 3D graphics with support for OpenGL ES 2.0 standard.. [24] These image sensors support the inclusion of video at a maximum speed of 30 frames per second. [20] also produce this camera sensors with Wavefront Coding technology [25] sharper images. nuvi 1350lmt The mobile phone housing has been redesigned and consists of a stainless steel frame that doubles as an antenna. Front and back are made of a sealed and scratch-resistant safety glass. Overall, the iPhone is 9.3 millimeters thick, or about 3 millimeters thinner than its predecessor.