Yes, for tracking it is required to use the GPS enabled Android phones. When the employee is on the move the phone is able to get the location of itself directly with the help of GPS satellites roaming around the earth. For this activity, no internet is required.and here the internet role is very limited and when the internet is available via 2G, 3G, 4G, 5G or WiFi mobile phone will send the stored location tracking data to platform otherwise it will wait for the internet to be available. Hence we call it a zero data loss system, and tracking data has almost no impact on tracking capability and its data history availability due to non-availability of internet.