: Do not use an FTF from a different Android version. If your E6833 is on 7.0 (build 32.4.A.1.54), flashing a 6.0 FTF can hard-brick the device due to anti-rollback.
If Flashtool cannot detect the device, you may need to reinstall the drivers from C:\Flashtool\drivers .
To clarify:
Power off your device completely. While holding the Volume Down button, connect the phone to your PC via USB. The notification LED should turn green, indicating it is in Flash Mode.
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: Many technicians utilize specialized service tools (such as MRT, Miracle Box, or custom Xperia FRP scripts) that target the device's persistent storage partition ( config or frp ) via Fastboot or specialized flash mode commands to clear the account lockout instantly.
Move the downloaded .ftf firmware file into your Flashtool firmware directory. : Do not use an FTF from a different Android version
: Download the official [Flashtool for Xperia devices](xperiablog.net East...1.3.1).
You can remove the screen lock on a by flashing an FTF firmware file using a computer . This is a "hot" or highly searched method because standard hardware key combinations do not work for hard resetting most older Sony devices. Flashing fresh firmware completely wipes the phone, clears forgotten passwords or patterns, and fixes software glitches. To clarify: Power off your device completely