Locate and open the "Spreadtrum Upgrade Tool" (or the specific tool recommended with your firmware download).
Never flash a file intended for Winstar W30 Pro or W30 Plus unless explicitly stated. Model names are often mislabeled on unauthorized download sites.
Sometimes the phone turns on but gets stuck in an infinite loop of showing the Winstar logo and restarting. This usually happens due to conflicting installed apps or corrupted system caches. The Winstar W30 Flash File wipes the system partition clean, resolving the bootloop issue.
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