Both the UWB tracker and the NFC radio can be on even when the device is "off" (although there's settings to change that behavior). IIRC the baseband can poten

Both the UWB tracker and the NFC radio can be on even when the device is "off" (although there's settings to change that behavior). IIRC the baseband can potentially do all kinds of crazy stuff too (no evidence that iphones actually do anything unusual, but perhaps that could change if the government sent a very compelling court order)