My son has had both of these Gizmo watches. The earlier model worked better, but only allowed him to call 2 people. The later version works, but does seem to spazz out & send me lots of messages that it's going off & on. My favorite part of it is that I can use gps to see where he is. If the bus is late, I can see where it is. If he says riding his bike, I know can see that he is where he's supposed to be. He's only 10, so I don't feel like he needs anything more. Verizon only charges me $5.00/mo to add on to my service. $5.00 well spent imo.