Huawei E355 Unlocked Mobile WiFi HSPA+ 21Mbps 3G WiFi Modem Router Discontinued model. Replaced by Huawei E8372h-153 Connect up to 5 WiFi enabled devices at the same time. MicroSD Card Slot (up to 32GB) External Antenna Port. Sim card or Micro SD card are not included. Windows XP SP2/SP3, Windows Vista SP1/SP2, Windows 7 Mac OS X 10.5 and 10.6 with latest upgrades, Linux