Huawei 5c - locked out wanting PIN1
Something went wrong and the data are damaged. Here are some steps to follow, try each one:


Try default PIN codes: 0000, 1234, 1111, etc
Reboot into the recovery then clear the phone cache. Either with adb command adb reboot recovery or by key combo.
Perform a factory reset from the recovery.
Flash the device with a fresh ROM.
You can get the firmware and the flashing guide from Huawei Support site. Unzip the zip and follow te instructions.