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⚠️ Flashing wrong firmware will hard brick. You need exact match for baseband (MDM9215/MDM9615).

The fluorescent lights of the tiny electronics repair shop buzzed like trapped flies. Outside, the rain in Kowloon hammered against the metal shutters, a relentless rhythm that usually lulled Chen to sleep. But tonight, he was wide awake.

Open the firmware update tool, which is usually provided by ZTE or can be downloaded from the ZTE website. The tool will guide you through the update process.