How to Hard reset Factory Reset Nokia 230 Dual SIM by Microsoft November 05, 2016 How to Hard reset Factory Reset Nokia 230 Dual SIM by Microsoft , just follow the following steps to factory reset your Nokia 230 Dual SIM or Singe SIM. 1. Turn on your Nokia 230 Dual SIM 2. From Keypad, dial *7370# 3. Ente…