If you're having issues connecting Cosmos Laser to Wi-Fi, try the following:

1. Update the firmware of the 4K dongle and Cosmos Laser to the latest version:

- Press the Settings button on the remote and select Settings > Device Preferences > About > System Update.

- Press the Settings button on the remote and select Settings > Device Preferences > About > Projector Firmware Update.

2. Try your phone's personal hotspot.

3. Try your router's 2.4G and 5G settings.

If you still have any questions or concerns regarding Wi-Fi connection, contact us for further assistance.