To resolve the issue of your Syma drone suddenly losing network connection, follow these steps:

1. Check Power Source
Ensure that both your drone's battery and the remote control's batteries are fully charged. A low battery can lead to connectivity issues.

2. Examine WiFi Settings
Look at the WiFi settings on your device (smartphone or tablet). Make sure your device is within range of the drone's WiFi signal. It typically broadcasts on a 2.4GHz frequency which can be subject to interference.

3. Reboot the Drone
Power off the drone and wait for about 30 seconds before turning it back on. This often resolves minor connectivity issues.

4. Reconnect to WiFi
Go to the WiFi settings on your mobile device and look for the drone's network name (often named something like "P70-VR"). Tap on it to reconnect - learn more.

5. Remove Interference
If you are in an area with many electronic devices, move to a less crowded space. Other devices may interfere with the WiFi signal.

6. Factory Reset (if necessary)
If the issue persists, consider performing a factory reset on the drone. Check the user manual for instructions tailored to your specific model.

7. Locate Firmware Updates
Ensure that both your drone and the associated application on your phone are up to date. Look for any firmware updates that may improve connectivity.

8. Seek Additional Help
If none of the above steps resolve the issue, consult online forums or user groups specifically for Syma drones to find solutions from other users who may have experienced similar problems - learn more.

By following these steps, you should be able to restore the network connection for your Syma drone.