Earlier Huawei devices used predictable cryptographic patterns that allowed for offline calculation. Phase 1: The Old Algorithm (Pre-2015) Mechanism: Based on a hash of the IMEI and the Model Number. Accessibility:
Generally used for older 3G modems like the E1550 or E173. huawei unlock code calculator tool
When a non-supported SIM card is inserted into a locked Huawei device, it prompts for an "Unlock Code." If the user enters the code generated by the calculator, the phone removes the network restriction. the phone removes the network restriction.