Immediately after plugging it in, (about 5–10 times) while still holding the first button.
At 47%, the USB cable slipped. Leo’s heart stopped. But the A133’s recovery logic held. He reconnected, restarted the FEL mode, and resumed. allwinner a133 firmware install
Windows will not recognize your A133 device in FEL mode without the proper drivers. Immediately after plugging it in, (about 5–10 times)