Apple watch is still tracking offline iphone

The accuracy of the location information depends on various factors:

1. The last known location accuracy: If your phone had a strong GPS signal and other location services enabled before it was turned off, the last known location will be more accurate.
2. Wi-Fi network coverage: The location accuracy can be improved if your phone's last known location was near a known Wi-Fi hotspot or a Wi-Fi network with good coverage.
3. Cellular network coverage: If your phone was connected to cellular data before being turned off, the location accuracy might be better in areas with good cellular coverage.
4. Movement of the device: If the thief is moving, the location updates will reflect the new positions as they occur. However, keep in mind that if the device is stationary, the updates may not change.