If I didn't misunderstand, you're suggesting that "node" carries the idea of being an autonomous entity that connects to a neutral network (i.e. no node is more

If I didn't misunderstand, you're suggesting that "node" carries the idea of being an autonomous entity that connects to a neutral network (i.e. no node is more privileged than any other). In that case a more accurate term might be "slave node" as opposed to the master nodes operated by carriers which control and monitor the communication flow. But I think that's a subjective view. The internet also has privileged nodes which could be used to monitor and control the network or individual nodes. "Tracker" simply ignores all the service aspects of the device and focuses on a single use for one of the parties involved (costumer, carrier, manufacturer). In that respects it is just as misleading a term as "phone".