... , 3G and 4G Signal Jammer Specifications■Primary Function: High Powered Cell phone, 3G, and 4G Signal Jammer ■Highly portable design ■Isolating Signal ... : - CDMA: 850 - 960Mhz- GSM: 925 - 960Mhz - DCS: 1805 - 1880MHZ - PHS: 1900 - 1990MHZ- 3G: 2110 - 2170Mhz - 4G WIMAX: 2345-2400MHz or 2620 ...