A. 1. Check your internet connection: Ensure that your device is connected to the internet. Try switching between Wi-Fi and mobile data to see if the issue persists. 2. Restart the app: Close the Ultrasurf VPN app completely and reopen it. This can help reset any temporary glitches. 3. Update the app: Go to the Google Play Store, search for Ultrasurf VPN, and check if there is an update available. If so, install it. 4. Clear app cache: Go to Settings > Apps > Ultrasurf VPN > Storage > Clear Cache. This can help resolve connection issues caused by corrupted cache files.

B. 5. Reboot your device: Sometimes, a simple restart can resolve connectivity issues. 6. Change VPN protocol: If the app allows, try switching to a different VPN protocol in the settings to see if that improves connectivity.