Basic customs duty adjusted for specified mobile phone parts and chargers; new rates and selective exemptions prescribed. Amendment to Notification No.57/2017 prescribes revised basic customs duty treatment for specified cellular mobile phone and charger components by substituting the entry for S.No.1, omitting S.Nos.2 and 3, removing item (i) from S.No.7, and inserting new entries (7A-7C and 9-20) that distinguish inputs, PCBA and moulded plastics for chargers/adapters, list tariff classifications, set differential duty rates, and add an Explanation defining Moulded Plastics and PCBA for tariff application.