There is no limit to the tracking range. As long as there is good cellular reception in the area the device is mostly used (e.g., school and home area), the AngelSense device will provide accurate tracking to your app. The app works on any phone or device with internet/data.
The device comes with an embedded SIM card (AT&T or T-Mobile in the US.*, Rogers Wireless in Canada, and O2 in the UK).
*After checkout, AngelSense asks US users to choose either the AT&T or the T-Mobile SIM. Choose the one with the best cellular reception in the area your device is mostly used (e.g., school and home area).
*The device’s embedded SIM (AT&T or T-Mobile) does not need to match your phone’s SIM. For example, even if your phone’s SIM is Verizon, and you access the app through your phone, your device will work fine with the app.