▁ ▁W ire less ▁Track ing ▁This ▁section ▁refers ▁to ▁tra king ▁methods ▁that ▁involve ▁the ▁monitoring ▁of ▁devices ▁through ▁the ▁aid ▁of ▁wireless ▁signals . ▁ ▁Mobile ▁ph ones ▁Mobile ▁car rier ▁anten nas ▁are ▁also ▁commonly ▁used ▁to ▁collect ▁ge ol ocation ▁data ▁on ▁mobile ▁ph ones . ▁The ▁ge ographical ▁location ▁of ▁a ▁power ed ▁mobile ▁phone ▁( and ▁thus ▁the ▁person ▁carrying ▁it ) ▁can ▁be ▁determined ▁easily ▁( wh ether ▁it ▁is ▁being ▁used ▁or ▁not ), ▁using ▁a ▁technique ▁known ▁as ▁mult il ater ation ▁to ▁calculate ▁the ▁differences ▁in ▁time ▁for ▁a ▁signal ▁to ▁travel ▁from ▁the ▁cell ▁phone ▁to ▁each ▁of ▁several ▁cell ▁to wers ▁near ▁the ▁owner ▁of ▁the ▁phone . ▁Dr . ▁Victor ▁K app eler ▁ ▁of ▁Eastern ▁Kentucky ▁University ▁indicates ▁that ▁police ▁surve ill ance ▁is ▁a ▁strong ▁concern , ▁stating ▁the ▁following ▁statistics ▁from ▁ 2 0 1 3 : ▁ ▁A ▁compar atively ▁new ▁off - the - sh elf ▁surve ill ance ▁device ▁is ▁an ▁I MS I - catch er , ▁a ▁tele phone ▁e aves dro pping ▁device ▁used ▁to ▁intercept ▁mobile ▁phone ▁traffic ▁and ▁track ▁the ▁movement ▁of ▁mobile ▁phone ▁users . ▁Ess entially ▁a ▁" f ake " ▁mobile ▁tower ▁acting ▁between ▁the ▁target ▁mobile ▁phone ▁and ▁the ▁service ▁provider ' s ▁real ▁to wers , ▁it ▁is ▁considered ▁a ▁man - in - the - middle ▁( MIT M ) ▁attack . ▁I MS I - catch ers ▁are ▁used ▁in ▁some ▁countries