Huawei E3531 is a USB modem designed for use in UMTS/GSM networks. It allows you to download at 21.6 Mbps and upload at 5.76 Mbps. Supported technologies: UMTS/HSPA+/HSDPA/HSUPA/GSM/EDGE/GPRS. The modem works with Windows XP, Windows Vista, Windows 7, Windows 8, Linux and Mac OS operating systems.