USB Data Charge Sync Cable for Samsung SGH-T139 USB data cable for transfer and syncing with your cell phone. Drivers and software not included. Connect your cell phone with your PC/Laptop by the USB port. Allows to manage & backup your phonebook, and change ring tones/logo etc. Allows you access your contacts, PC data, the internet and e-mail. Transfer rate up to 4 Mbps. Generation X antenna booster enhances signal strength.