Mumbai is India's most "forgetful" city, according to Uber's Lost & Found Index 2020, followed by Kolkata (formerly Calcutta) and Allahabad.
This is an annual database compiled by the cab aggregator, based on what passengers in different countries leave behind in Uber's taxis.
Phones top the list in India, which also includes items as unusual as artificial acrylic teeth.
Uber found 3 August 2019 to be the "most forgetful" day in its survey.
India's capital, Delhi, ranked fourth among the 10 most forgetful cities, followed by the southern city of Bangalore at number 5.
