Deportation agents use smartphone app to monitor immigrants

U.S. authorities have broadly expanded the use of a smartphone app during the coronavirus pandemic to ensure immigrants released from detention will attend deportation hearings, a requirement that advocates say violates their privacy and makes them feel they’re not free.

More than 125,000 people — many of them stopped at the U.S.-Mexico border — are now compelled to install the app known as SmartLink on their phones, up from around 5,000 less than three years ago. It allows officials to easily check on them by requiring the immigrants to send...