Here’s a breakdown to help clarify:
After a factory reset, Google’s FRP requires the previous Google account. Some users search for a "16-digit code" to bypass this. Spoiler: There is no universal 16-digit code for FRP on modern Huawei devices. You need specialized offline tools (e.g., HCU, Chimera, or Sigma) that use a computer, not a simple calculator. Huawei Code Calculator 16 Digit