Sierra Wireless USBConnect U305 3G USB Modem - AT&T This device comes with a standard size SIM card slot (SIM card not included) as well this device has a MicroSD card slot (no card included) Just Put In your AT&T Sim Card Into The Aircard Modem And You Are Connected! The Sierra Wireless AirCard USB 205 modem allows you to easily connect to a wireless broadband network while on the go. It features high speed HSPCA download speeds up to 7.2 Mbps and upload speeds up to 5.76. Simply plug into a USB port on your laptop and enjoy broadband internet access via your mobile provider. Frequency bands supported by the USB 305 modem: Technology Bands Location 2G 850 MHz (cellular band) North America 900 MHz (EGSM band) Europe 1800 MHz (DCS band) Europe and Asia 1900 MHz (PCS band) North America 3G WCDMA 850 (band V) North America and Australia WCDMA 1900 (band II) North America WCDMA 2100 (band I) Europe, Asia, and Australia Only will work on AT&T Easy Cheap Brand New Plug and Play Modem