Changing SIM card, you can be tracked by cellphone used.Location can be narrowed down using IMEI triangulation of cell towers the cellphone is closest to.
However, many of field test features listed are no longer available unless you use an earlier version of the firmware, or re-enable via homebrew.
(If you don’t see this link, it means Windows Update didn’t find any updates for your computer.) 5.
In right pane, click Check for updates, and then wait while Windows is searching for the latest updates. Click the link that tells you optional updates are available.
Mode: Field Test You will then be taken to a page providing many current information detailing your cell connection.
Note that when you are in this mode, the signal strength bar on the top-left corner becomes a negative number.