Yes, but only for a very specific, obsolete scenario.
Between 2010 and 2013, Huawei feature phones (not smartphones) running ThreadX or Nucleus OS had simple hardcoded master codes. For example, the Huawei E1550 USB modem and Huawei U526 phone had a master code: #3646633#. Entering this into the dialer opened engineering mode, and from there, you could unlock the SIM. --- Huawei Code Calculator -universal Master Code-
Technicians used a "calculator" spreadsheet to convert IMEI to a service code for those specific old modems. That is the origin of the myth. Yes, but only for a very specific, obsolete scenario
On a 2024 Huawei P60 or Nova 12? Zero chance. Entering this into the dialer opened engineering mode,
Let’s dissect the specific claims made about the "Huawei Code Calculator."
If your Huawei phone runs EMUI 9 or older (Android 9 or below) and you had a Google account:
