If someone took his phone, they would likely remove the SIM card immediately. I asked my 16 year old son if that would then stop the phone from pinging. He said that it would no longer ping at cell towers, but (I don’t know if this is true or not) if it were the phone of someone in our family, we could still trace it in our location services (app? I don’t know what you call it). Not everyone activates this feature. It is not popular with my 25 year old and he removed himself from the thing so that we do not know where he is at all.The problem with this scenario is that law enforcement stated they don’t believe he was robbed of card and expensive phone because there is no activity on any of it.