Android system requirements and installation permissions
Before installing an APK, note whether the system reports an incompatible version, a signature conflict, or an unauthorized installation source. Each has a different fix, and repeatedly downloading the same package usually won’t help. Updating an existing app also requires a matching package name and signing key. Don’t uninstall the old version until you’ve backed up your subscription and custom rules.
After opening the app for the first time, add a valid subscription URL in the subscription settings and update it. Select a node, tap Connect, and approve Android’s VPN request. The VPN icon in the status bar only shows that traffic routing is active; it doesn’t guarantee a successful remote connection. Test an actual webpage and check the logs if anything goes wrong.
Some systems restrict background activity. Check battery optimization and background permissions only if the connection keeps dropping or stops working when the screen is locked. Work profiles, cloned apps, and per-app proxy settings can also affect which traffic is routed. Start with the default scope while troubleshooting, and avoid changing several variables at once.