Just don't let your battery die or you'll have to explain it to the police
This technology alerts authorities when quarantined individuals leave their designated shelter locations or turn off their mobile devices.
According to Reuters, Taiwan appears to be the first country to use mobile location data as a quarantine compliance mechanism.
That may or may not be the case. Singapore has implemented a system whereby quarantined individuals are required to stay home and to click on links in SMS messages from health authorities that report their cellphones' location, thus confirming they are indeed at home. [FULL STORY]