: Wait another 5 seconds after the tool finishes before releasing the Power button. Unplug the speaker and "Forget" the old device in your phone's Bluetooth settings before reconnecting it as a new device. Troubleshooting Common Issues "No Flash ID Matched"
If your D8 works perfectly, you likely do not need an update. Updating carries a small risk of bricking the speaker if done incorrectly. W-king D8 Firmware Update
No.
: Entering "Device Firmware Upgrade" (DFU) mode is the most technical hurdle. It usually requires a specific sequence of holding the Play and Power buttons while the device is off. : Wait another 5 seconds after the tool
Unlike many gadgets, the W-King D8 does have a user-accessible menu to display firmware version via app or button combo. You typically need: W-king D8 Firmware Update