A. 1. Check your internet connection: Ensure that your internet connection is stable and functioning properly without the VPN. 2. Disable battery saver: If your device is in battery saver mode, it may limit data transfer. Disable this mode and test the VPN again.

B. 3. Clear app cache: Go to Settings > Apps > Ultrasurf VPN > Storage > Clear Cache to resolve any data transfer issues caused by corrupted cache.