The JAG S2 GPS dog collar works with an integrated SIM card, as for your Smartphone, which requires a subscription to be able to communicate on the 4G/LTE network so that the box can transmit its position when you are looking for it.
The lifetime plan allows you to take advantage of all the features of your Jagger Lewis GPS collar included in the annual plan without having to pay a subscription later to use it. You can use the formula for life with another dog if the situation arises.