If you only want to without full flash:
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 Nokia C1-01 Flash File Without Password
Before diving into flashing, let's understand what you're fighting against. The Nokia C1-01 (and similar S40-powered Nokia phones) has a default security code of . However, if a previous owner changed it and you've forgotten it, or if you bought a second-hand locked phone, you have three options: If you only want to without full flash: