What’s the best VPN for Android? If a client works while the screen is on but keeps disconnecting when it’s locked, don’t rely on speed-test rankings alone. An Android VPN connection depends on the client, the system network interface, battery settings, and the current network. A break at any point can leave webpages unavailable. To compare clients, test background activity, battery restrictions, and per-app proxy settings on the same network and route instead of treating one successful connection as proof of reliability.
First, identify the issue: disconnection, sleep, or an app-specific access problem
If the VPN icon disappears, the VPN session has usually disconnected. If it remains visible but only certain apps fail to load, check routing rules, DNS, and the affected app’s network permissions. You may also see a brief interruption when switching from Wi-Fi to mobile data: the underlying network address changes, so the client needs to reconnect. That alone doesn’t indicate a problem with the route.
For a useful comparison, first note the route and connection status shown in the client, then visit a webpage that normally loads in your browser. Lock the screen, unlock it, and check whether the system status bar, client status, and page loading agree. Then switch networks and repeat the test. Change only one setting at a time: test with battery settings unchanged first, then adjust battery restrictions. This helps distinguish background app management from route reconnections and app-specific issues.
The VPN icon in the status bar only indicates that the system still has a VPN interface; it doesn’t prove that a particular website is reachable. Check the client status, browser results, and network you’re using together.
Background activity and battery optimization: how to compare them
Android clients typically use the system’s VpnService interface to establish a VPN connection. Keeping it connected often requires a foreground service and a persistent notification, but a persistent notification doesn’t guarantee that the system won’t restrict background activity. Settings names and locations vary by manufacturer, and some devices offer separate controls for auto-start or background activity. When choosing an Android VPN, look for clear connection status, an option to reconnect after a drop, and an easy way to reconnect if something goes wrong.
Start by finding the client’s battery settings on your device and checking whether its usage is restricted. Then check notification and background activity permissions. Adjust restrictions only for the client you’re testing; changing the system-wide battery mode at the same time makes it harder to tell which setting had an effect. Once you’ve made the change, repeat the screen-lock, unlock, and network-switch tests on the same route. If opening the client is enough to restore the connection, background activity restrictions are a likely cause.
| What you observe | Check first | How to test |
|---|---|---|
| Connection drops when the screen is locked | Battery restrictions, background activity, client reconnection settings | Keep the route unchanged, adjust the client’s battery restrictions, then test with the screen locked |
| Temporarily unavailable after switching networks | Reconnection status after a network switch | Check whether the client reconnects, then try loading the page again in your browser |
| Only one app fails to load | Per-app proxy settings, domain rules, app cache | Temporarily switch to global mode and compare access in the same app |
| Connection appears normal, but webpages fail to resolve | DNS settings and the resolution path used by the rules | Compare the client’s default DNS with your current custom settings |
If your system offers options such as “Always-on VPN” or “Block connections without VPN,” understand what they do before enabling them. The first tells the system to try to keep a specified VPN active; the second may prevent traffic outside the VPN from connecting. That restriction can affect tests of per-app proxy settings. Menus vary by Android version and manufacturer, so a missing option with a particular name doesn’t mean the client can’t connect.
Per-app proxy: choose which apps use the route
Per-app proxy settings choose a traffic path by app; they aren’t the same as routing traffic by website domain. If the client offers “proxy selected apps only,” apps you haven’t selected usually keep their regular network path. If it offers “exclude selected apps from proxy,” the selection works the other way around. Read the mode description before changing anything so the result matches what you expect. Check browsers and streaming apps used for international sites, as well as everyday local apps, according to your needs. There’s no need to route every app the same way.
DNS resolution can also affect domain-based routing. Once a connection is established, an app may resolve domains itself or use the DNS configured in the client. If a rule depends on a domain but the DNS result doesn’t follow the expected route, a webpage may sometimes take the wrong route. When checking for DNS leaks, don’t look only at the displayed exit address; confirm that DNS requests follow the intended path too. Android Private DNS, a browser’s built-in Secure DNS, and the client’s DNS settings can all interact. If something goes wrong, compare them one at a time rather than changing everything at once.
- ✅ First check whether the client proxies only selected apps or excludes selected apps from the proxy.
- ✅ Test the same app in global mode and per-app mode, and note the difference.
- ✅ Check that your browser’s Secure DNS, system Private DNS, and client DNS settings match your expectations.
- ❌ Don’t treat app-based routing and domain-based routing as the same setting.
Some apps use system components or open an external browser to complete sign-in. Even if you selected the main app, those follow-up requests may not use the same route. If an app’s home screen loads but its sign-in page doesn’t, test the route in global mode first. Then return to the per-app list and check the apps or browser involved in sign-in. Keep a record of your original settings so you can restore them after troubleshooting.
Clients and protocols: check compatibility before comparing routes
A subscription link provides access to a node configuration; it isn’t a file format that works with every Android client. Before importing it, check that the configuration format is supported by the client, then add the link using its subscription import feature. Make sure you don’t include spaces or extra characters when copying the URL. A successful import only confirms that the configuration was read; you still need to select a route and verify the connection. A subscription link can provide access to your configuration, so don’t post it publicly in comments or screenshots.
Shadowsocks, VMess, Trojan, VLESS, Hysteria2, and TUIC are different protocols or proxy solutions, with different parameters and transport methods. A client’s claim that it “supports subscriptions” doesn’t mean it can parse every node type in a subscription. If a route fails to connect, first check protocol compatibility and whether the configuration is complete, then look into speed. The performance of Hysteria2, TUIC, and other options also depends on the network you’re using; the protocol name alone can’t tell you which one will be more reliable on every Android device.
Route types don’t replace troubleshooting on your Android device. An IEPL private line generally refers to a specific cross-border transmission path; a relay route passes through an intermediate node, while a direct route doesn’t use that kind of relay. These terms describe how traffic is routed and won’t automatically prevent Android from restricting background services. For streaming and cross-border access, choose a route suited to the target service’s region, then test playback, page loading, and reconnection after a network switch on the network you actually use.
Choosing an Android VPN by use case: a practical troubleshooting sequence
If the main issue is disconnecting when the screen is locked, compare the client’s status indicators and automatic reconnection, then check whether the system restricts background activity. If only certain apps have access problems, test per-app proxy settings and DNS first. If no apps can connect after the VPN is on, check the subscription configuration, protocol compatibility, route, and current network one by one. This sequence is more effective for finding the cause than repeatedly switching nodes.
- Import the subscription on a stable network, choose a route in the target region, confirm that the client shows connected, and test with a familiar webpage.
- Keep the route and network unchanged, lock the screen, and unlock it again. If the connection drops, check the client’s battery restrictions, background activity, and reconnection settings.
- Use global mode and per-app mode to access the same app. If only per-app mode fails, check which apps are selected and which browser the app opens.
- Switch between Wi-Fi and mobile data and watch the reconnection process. If the client shows connected but domains won’t resolve, compare the DNS settings in Android, your browser, and the client.
- Note which change fixed the issue, undo any temporary settings you no longer need, and test again in your usual scenarios.
VPNKH provides international routes. Before using the service on Android, check the setup guides and route details to confirm how to import your configuration and choose a region, then test the connection using the steps above. If the client or configuration continues to cause problems, note the error, network type, and settings you’ve tried, then look for a solution in the Help Center. This makes troubleshooting easier than simply reporting that it “won’t connect.”