Some older or extremely budget 168 models ship with no WiFi password. When your phone prompts you, leave the field completely blank and tap "Join" or "Connect".
Look for or Wi-Fi Hotspot to view or reset your password. Troubleshooting Connections Frequently Asked Questions | T'EYES
If you are looking for the actual to connect your phone to the dash cam's hotspot, try these industry-standard defaults: 12345678 (Most common for generic and Peztio/Vava models) 123456789 (Standard for Thinkware models) 00000000 (Generic default for some unbranded "168" DVRs) How to Use the "168" Passcode