If your unit asks for a factory code at this stage, try: 1234 , 0000 , 8888 , or 126 . These are universal for Chinese head units. Part 5: Method 3 – Hard Reset Without Screen Access (Boot Loop Fix) This is the most searched-for scenario: "My NDDN-W57 is stuck on the Android logo. How do I reset it?"
Proceed to Part 6 (boot repair). Part 6: Boot Repair via USB (The Nuclear Option) If the hard reset fails, the firmware is corrupted. You need to flash the stock ROM. This is advanced but DIY-friendly. nddn-w57 reset
Perform the Factory Reset via RST button (see Part 5). But wait—this won’t work if the unit has a lock screen before booting? Actually, the factory reset via hardware RST bypasses the lock screen entirely because it happens before Android loads. If your unit asks for a factory code