huawei modem UMG181 3G gsm modem webconnect T-mobile
1. voice&ussd activated
2. external antenna connector CRC-9

Huawei UMG181 Modem Specifications

Technology: GSM/GPRS/EDGE/UMTS/HSDPA/HSUPA
Frequency: 850/900/1800/1900 MHz (GSM/GPRS/EDGE); 900/2100 MHz (UMTS/HSDPA/HSUPA)
HSDPA data transfer speed up to 7.2Mbps
HSUPA date transfer speed up to 5.76Mbps.
Operation System: Microsoft® Windows Vista®, XP, 2000 (Plug-and-play); Apple® Mac® OS X version 10.4 or later
Antenna: Internal Antenna
USB 2.0 connectivity
Dimensions: 2.6 x 1.0 x 0.5 inches
Weight: less than 1 ounce
Integrated microSD card slot (microSD card sold separately)
Multicolor LED status indicator
The Mobile Connect USB Modem is all the hardware you need to connect to Mobile Broadband. Just plug Huawei UMG181 into the USB port on almost any laptop or PC, install the software and you're ready to go.