The price as of March of 2012 is $19 per month per device.
The device needs to be GPS enabled, of course, but it also needs an active wireless data plan.
cages the cellphone was turned off so it wasn't transmitting a signal at all,' Taylor said.
Taylor says the study shows there is a "biological basis" to suggest cellphone exposure can impact pregnancies.
Carriers are permitted to utilize triangulation, GPS and other tracking technologies in the event of a kidnapping.