Motorola ES400. Display diagonal: 76.2 mm (3 "), Display resolution: 640 x 480 pixels, Display: LCD. Internal memory: 256 MB, Internal memory type: RAM, Flash memory: 1024 MB. Processor clock speed: 600 MHz, Processor family: ARM11, Built-in processor: MSM 762. Mobile operating system provided: Windows Mobile, Operating system version: 6.5.3 Professional. GSM bands supported: 850, 900, 1800, 1900 MHz, WCDMA bands supported: 850, 1900 MHz