Determined to succeed, John decided to seek help from a colleague, an experienced engineer who had worked with Huawei devices before. Together, they pored over the documentation and online forums, looking for a verified solution.

Emboldened by this discovery, John and his colleague decided to attempt the upgrade. They carefully followed the guide, double-checking each step and ensuring that the device was properly configured.

After what seemed like an eternity, the upgrade was complete. The device had been successfully converted to EPON mode, and the network was up and running.