This is a special korean GPS service for kids. It released 2004. Now it is very normal and popular among parents.
Basically it tracks kid's location and sends the information to parent's phone.
It helps to find kid's location even though the phone is off.
Main function: 1.emergency call: -kids press emergency buttom-> parents receives kid's location and voices. - if kids can't pick up the phone, a phone automacally activates so parent can hear the situation. 2. always can check kid's locations through parent's phone 3. safety zone: once parents enroll the safety zone, when kids are out of safety zone, i- kids service sends alert to parent's phone 4. when kids call to parents, it detects kid's place too.
i-kids service is only 30$ per month. Actually most of kids use these kinds of service in Korea.