... . (1)use: indoor ,to expand the cellphone signal wcdma booster kit here the signal is weak or unavailable.(2)recommeding reazon:where ... there is cellphone,there need booster,because the weak signal problem is gsm mobile antenna booster so common in everywhere ... :GSM900MHz,DCS1800MHz,WCDMA(3G),CDMA850MHz,CDMA450MHz,CDMA1900MHz,IDEN,EGSM,BLUETEETH,GPS and so on. 4.When you install you need the ...