PHONE and TWO WAY CALLING - Two Way Calling with Best Friends and Loved Ones - You can call the watch and the watch can call you. PARENTS KNOW WHERE THEY ARE - Parents always know where your child is at all times with the GPS Guardian APP on your smartphone. EMERGENCY ASSIST BUTTON - Should your child require help in an emergency, they will be able to alert you by holding the SOS button. Their location and status will be available through the Guardian APP on your smartphone. NEVER LOSE SIGNAL - Comes pre-installed with a CPR Chameleon PAYG Sim which provides maximum mobile coverage at all times by intelligently switching between all available mobile networks based on the best available signal.