USB Data Cable Sync for Samsung i637 Jack, T349, A167, Alias 2 SCH-U750, Magnet A257 / A177, Smooth U350, Trance U490, Instinct S30 USB Data Cable for Data Transfer and Syncing with your cell phone Connect your cell phone with your PC/Laptop by the USB port Allow to manage & backup your phonebook, and change ring tones/logo etc. Allow you access your contacts, PC data, the Internet and e-mail. Transfer rate up to 4 Mbps.