[tonyarkles]

> SIM-free phone

Is the modem completely disabled? Does it still show the "SOS" option that allows you to call 911 without a SIM? If so, and if it's ever been turned on in your residence, there's a decent chance the IMEI could be traced back to your house just based on pattern-of-life movement.

[gruez]

That's why you also need to enable airplane mode.

[kazinator]

Which you can just engage on your current phone.

[bmicraft]

Airplane mode often leaves bluetooth on, with all the tracking that enables.

[ChoGGi]

On Android at least for now, you can use systemui tuner to pick what gets toggled for airplane mode: Cell, Bluetooth, Wi-Fi, NFC, WiMAX.

No root needed