You can use specialized service tools like InfinityBox BEST (BB5 Easy Service Tool) , Miracle Box , or the classic Phoenix Service Software . Step-by-Step Nokia C1-01 Flashing Guide

To flash a without a password, you can download the stock firmware and use service tools like Infinity BEST or Phoenix Service Software . Flashing the device will restore it to factory settings and remove any forgotten security lock codes. Download Links

Best-suited tools for this Infineon-based device include Best Smart Tool (Infinity-Box BEST) or Miracle Box . 2. Basic Preparations