... of the signal detector: 5-20M Cellphone Signal Detector/Mobile Phone Detector/Signal Detector I. IntroductionThis Cellphone signal detector can ... detect the cellphone signal of CDMA, GSM, DCS, PHS & 3G.The detector detects the cellphone signal, then it ... 1710MHz ~ 1785MHz (DCS)d. RX Frequency : 1920MHz ~ 1980MHz (PHS & 3G) Each frequency band has a corresponding antenna, so there are 4 antennas ...