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After contacting the administrator, they proactively refunded me and had me try purchasing again. This time there were absolutely no issues—the tutorial displayed smoothly. It was extremely detailed, with thorough explanations and notes throughout the entire process. The whole procedure ran semi-automatically via BAT files, taking about an hour and a half. It successfully downgraded my F50, which I accidentally upgraded to B15, back to the B09 version. It flashed the advanced backend and locked the N78 band. Everyone, please learn from my mistake: never accept B15 if your signal is weak. You'll essentially be stuck with the slow N1 band instead of the fast N78 5G. This isn't a scam post—it's real. But remember: register as a member before clicking "Pay," or you'll end up like me, missing out on this excellent tutorial. Let me reiterate: this is not a scam post; it's genuinely effective. I'm not a shill—this is my personal journey. Huge thanks again to the developer for their hard work. Tech-challenged folks, please stop randomly clicking upgrades!
Why did I buy this without any tutorials? What a scam!