To hard reset a MYKI Watch 4 Go to product viewer dialog for this item.
Scroll down to the bottom of the device settings. You should see: How to Hard Reset MYKI Watch 4
If the watch is unresponsive, you can reset it by sending a text message from the parent's phone paired with the app: To hard reset a MYKI Watch 4 Go
Warning: A hard reset (factory reset) erases all personal data, paired devices, settings, and installed apps. Back up anything important and ensure the watch has at least 50% battery or is plugged into power. How to Hard Reset MYKI Watch 4