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One very easy way to check if you've successfully unlocked the bootloader is - when the phone is booting and before the Umidigi logo - you see some text mentioning something about Orange mode and how your device isn't secure.
As for the rest of your comment, I don't think I understand what you're asking. SP Flash Tool is used to flash ROMs and related files onto your phone; it is not what allows you to unlock it. Using ADB and fastboot commands with the PowerShell/Command Prompt is what grants the unlocked bootloader. That's among the first steps you take to unlock the bootloader, then you use SP Flash Tool to flash a custom recovery (like TWRP). |
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