For older security patches, some users utilize the "dload" method, which involves loading specific firmware from an OTG flash drive to exploit a bypass in the setup wizard. Warning: Attempting to downgrade modern firmware can "brick" your device (make it unbootable). Official Recovery Options (Recommended First)

Professional service tools are the most reliable way to bypass the Huawei ID lock on the JNY-L21, which typically uses the processor.

Widely considered the gold standard for this model. It requires selecting the HiSilicon 810 processor and using the "Reset Huawei ID" option. Visit the Sigma Plus Official Site for software and required pack details.