: Use an original or high-quality USB data cable. A loose connection mid-flash can permanently hard-brick the device.
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Once you see the success message, you can safely disconnect your phone from the PC. Press and hold the power button for about 10-15 seconds to turn the phone on. The first boot after flashing can take a very long time (up to 10 minutes), which is normal. You will then be greeted by the initial Android setup screen. : Use an original or high-quality USB data cable