The iPhone 3GS has an improved "oleophobic" oil repellent coating over the 3.5" 320x480 display, but otherwise the displays are essentially the same as well except for a slightly "warmer" tint on the iPhone 3GS.
§ On June 7, 2010, Apple introduced a "low end" configuration of the iPhone 3GS alongside the iPhone 4 and this "low end" configuration was offered with 8 GB of storage for US$99 with a two-year agreement. On October 4, 2011, upon introducing the , Apple dropped the price of the 8 GB iPhone 3GS to free with a two-year contract. Apple discontinued the iPhone 3GS entirely on September 12, 2012.
In addition to the iPhone 3G's Tri-band UMTS/HSDPA radio and quad-band GSM/GPRS/EDGE radio, the 3GS also adds support for 7.2 Mbit/s HSDPA allowing faster downlink speeds though upload speeds remain the same as Apple had not implemented the HSUPA protocol. Other updates include the addition of a built-in Nike+iPod sensor which eliminates the need for an external sensor and allows native Nike+iPod support. The server on the iPhone 3GS has also been slightly improved adding support for Bluetooth 2.1 specifications.