One of the many famous brands in the GSM USB modem is Haier. And this is the Haier WM220. This USB Modem support GSM GPRS/EDGE/3G/HSDPA/WCDMA, has a dualband 900/1800Mhz,
connect to PC with standard USB 2.0 high speed, at HSDPA signals speed of download up to 3.6Mbps, could be used for SMS and ready phonebook. Using a Qualcomm QSC 6270 chipsets, and the drivers is ready for WIndows XP, Vista and OS Mac.
Haier WM220 Specifications:
Network : GSM, GPRS/EDGE/3G/HSDPA/WCDMABands : Dualband GSM 800/1900Mhz
Chipset : Qualcomm QSC 6270
Type : USB (2.0 standard USB)
Support : SMS, Voice and phonebook
Model : R-UIM, Unlocked, Global roaming
Drivers : Windows XP, Vista and OS mac