Unlocking modern Huawei smartphones (P-series, Mate series, Honor devices) is vastly different. Modern phones use NVRAM (Non-Volatile Memory) locks and complex server-side authentication. A simple "16-digit code calculator" generally does not work on modern Huawei Android phones. These phones usually require paid unlocking services or official carrier permission.
as of 2018. For network unlocking, modern Huawei devices often require a 16-digit NCK (Network Control Key). 1. Network Unlock Guide (SIM/Carrier Unlock) huawei 16 digit unlock code calculator
A 16-digit alphanumeric key required to unlock the bootloader of Huawei/Honor devices. Unlocking modern Huawei smartphones (P-series
If you visit a "free code calculator" website today, here is what happens behind the scenes: huawei 16 digit unlock code calculator