Redmi 3s+解锁Bootloader遇-1未知错误，求助能否点击解锁

Hey there, let's tackle your Redmi 3s+ Bootloader unlock issue step by step. First off, let’s address your core questions, then dive into fixes for that annoying "-1:Unknown error".

Should you click the unlock button right now? #

I’d recommend holding off for a bit. That unknown error usually signals a problem with the verification process (like account validation, device recognition, or network issues) rather than a ready-to-unlock state. Blindly clicking might not resolve the issue, and in some cases, could trigger temporary unlock restrictions from Xiaomi or lead to unexpected device behavior (though hardware damage is rare). Let’s fix the error first, then try again.

Will clicking unlock damage your device? #

In most cases, no—hardware damage is extremely unlikely. Even if you click it, the worst that’s likely to happen is:

• The unlock fails again (same error)
• Your device restarts back to Fastboot mode
• Xiaomi temporarily blocks your unlock attempts (usually for a short window)
  That said, it’s still better to resolve the root cause of the "-1" error before retrying to avoid unnecessary headaches.

Common fixes for the "-1:Unknown error" #

Let’s walk through the most likely culprits and how to fix them:

• Verify your Xiaomi account eligibility: Xiaomi requires your account to be logged into the device for at least 7 days, with "Find My Device" enabled. Double-check these settings in your phone’s Mi Account menu.
• Update your unlock tool: Old versions of the Mi Flash Unlock tool can cause compatibility issues. Uninstall the current tool, download the latest version from Xiaomi’s official site, and reinstall it.
• Fix USB driver issues: Faulty or outdated USB drivers often cause recognition problems. Uninstall any existing Xiaomi USB drivers from your computer, install the official Xiaomi USB driver pack, then restart your PC and reconnect your phone in Fastboot mode.
• Check your network connection: Unlock requires an active internet connection to validate your account. Try switching to a different network (like a mobile hotspot) if you’re on a corporate/campus network that might block Xiaomi’s verification servers.
• Re-enter Fastboot mode: Sometimes a simple reboot into Fastboot can resolve recognition glitches. Power off your phone, then hold the Power + Volume Down buttons until you see the Fastboot screen, then reconnect to your PC.

Once you’ve worked through these steps, try the unlock process again. The error should clear up if the issue was with account validation, drivers, or network.

内容的提问来源于stack exchange，提问作者user164513