The Samsung SGH-X660 is a notable upgrade from its predecessor, the SGH-X600, featuring several enhancements that make it a compelling choice for mobile users seeking functionality and style. One of the most significant changes is the slim and sleek design, making the SGH-X660 even more portable and visually appealing. The device now boasts a larger display, transitioning from a 1.8-inch screen in the X600 to a 2.2-inch vibrant TFT display, which enhances the user experience with better image clarity and more vivid colors.In terms of camera capabilities, the SGH-X660 has upgraded its rear camera to a 1.3-megapixel lens, providing improved photography options compared to the VGA camera found in the X600. This enhancement allows for clearer and more detailed images, catering to users who enjoy capturing moments on-the-go.The internal memory has seen a notable increase, now offering 64MB of storage, a leap from the 32MB in the previous model. This allows users to store more contacts, messages, and multimedia files without the constant need for management or deletions. Furthermore, the SGH-X660 supports expandable memory via a microSD card slot, giving users the flexibility to increase their storage capacity significantly.On the connectivity front, the SGH-X660 introduces support for GPRS, enhancing browsing capabilities and allowing for quicker internet access compared to the slower WAP service on the X600. Additionally, the device integrates Bluetooth technology, empowering users to connect wirelessly to headsets and other devices, a feature that was missing in the previous model.Battery performance has also improved with the inclusion of a more robust battery, ensuring that users can enjoy extended talk time and standby time. This enhancement addresses one of the common complaints from X600 owners, providing a more reliable usage experience.In summary, the Samsung SGH-X660 represents a substantial advancement in mobile technology over the SGH-X600, with improvements in display size, camera quality, internal storage, connectivity options, and battery life, making it an attractive option for users looking for a well-rounded mobile device.