Palm Inc. Monday unveiled two new handhelds under its Tungsten brand that introduce phone features and built-in support for the wireless technology Bluetooth to its line-up. The Tungsten T is slimmer and more compact than previous handhelds from Palm. Sized at 4 inches by 3 inches, it can be extended another inch to expose a hidden Graffiti pad for inputting data with a stylus pen. The Tungsten W features a thumb-sized keyboard and supports GSM (Global System for Mobile Communications) and GPRS (General Packet Radio Service) to make voice calls and send and receive e-mail. Both Tungsten devices feature Palm’s new five-way navigator, a dial on the face of each device that can be used to navigate the display with one hand. Both also sport 320-by-320 pixel, 16-bit color displays, 16MB of RAM and an SD (Secure Digital) drive.