There are several hardware variants of the E5336. The suffix matters: is specific. To verify you have the correct model:
Go to 192.168.8.1 > Settings > SIM PIN. Disable PIN request. Some unlock firmwares have a bug with PIN-enabled SIMs. E5336bs-2 Unlock Firmware
This is the #1 cause of failure. Ensure you have disabled "Driver Signature Enforcement" on Windows 10/11. There are several hardware variants of the E5336
Unlocking your E5336bs-2 transforms it from a carrier-locked accessory into a versatile global hotspot. While the technical steps require precision, the reward of using any SIM card anywhere in the world is well worth the effort. E5336bs-2 Unlock Firmware
E5336bs-2_Generic_V100R001C1B122_NoLock.bin