Siemens Cinterion TC35i, GSM, 14.4 Kbit/s, GSM 900/1.800 MHz, -20 - 70 °C, -40 - 85 °C, 4.59 oz (130 g) Siemens Cinterion TC35i. Modem type: GSM, Modem speed: 14.4 Kbit/s, Interface: GSM 900/1.800 MHz. Weight: 4.59 oz (130 g), Depth: 2.91" (74 mm), Height: 1.3" (33 mm)