Geo-fencing, a discreet tracking system that alerts authorities when someone leaves a specific geographic area, has helped officials monitor neighbourhoods on lockdown. Authorities are also listening in to the calls of COVID-19 patients to monitor whether their contacts are talking about having symptoms.

from Times of India https://timesofindia.indiatimes.com/world/pakistan/pakistan-uses-terrorist-tracking-tech-to-hunt-coronavirus/articleshow/76059922.cms