Cellphone Locator System Needs No GPS Satellite http://ow.ly/X5ML
Remark of the author after sending the tweet:
Locating without GPS saves the battery, works indoor and makes tracking devices smaller.
Cellphone Locator System Needs No GPS Satellite http://ow.ly/X5ML
Remark of the author after sending the tweet:
Locating without GPS saves the battery, works indoor and makes tracking devices smaller.