DS has the use of an old phone of ours. It doesn't have a SIM, it only works when connected to our WiFi. He uses it for music in his rooms and to be able to contact us if he's at home alone. He's not supposed to take it outside, is therefore not locked with a passcode.
It must be out of battery; I can't ping it. We don't remember when he last had it. Neither DC remember seeing it recently. I've spent the morning pulling the place apart. Where should I look next?