Our security evaluation reveals that V2RayNG:

Your privacy is only as good as the server you connect to. Avoid "free" public servers found on shady forums, as they may log your data.

Most providers give you a vmess:// or vless:// link or a QR code. Import to v2rayNG: Tap the "+" icon at the top of the app. Select "Import from Clipboard" if you copied a link. Select "Scan QR Code" if you have a code on another screen.