... the cellphone signal where the signal is we home cdma cell phone signal booster ak or unavailable.(2)recommeding reazon:where there ... is cellphone,there need booster,because the weak cell phone network amplifier signal problem is gsm mobile antenna booster so ... GSM900MHz,DCS1800MHz,WCDMA(3G),CDMA850MHz,CDMA450MHz,CDMA1900MHz,IDEN,EGSM,BLUETEETH,GPS and so on. 4.When you install you need the ...