Setting up an Android VPN is easiest when you import the subscription, grant VPN access, and adjust battery settings in that order. Seeing a server list does not mean you are connected, and a VPN icon does not guarantee that the apps you want are using the right route. This guide covers installation, permissions, background activity, and connection checks separately, with a result to look for at each step.
Before you install: Check the client and subscription format
Get the installer from the client download section in your account panel or the project’s official release channel. Check the app name, publisher, and supported platform; don’t rely on a download button in search results to verify the source. If Android asks you to allow unknown apps, grant that permission temporarily to the browser or file manager you’re using, then revoke it after installation.
The client reads configuration, applies routing rules, and forwards traffic. The subscription link provides and updates server configurations, while your plan determines which features are available. These aren’t interchangeable: the account login page isn’t a subscription URL, and you can’t paste a plan page into a client. If you haven’t set up your account and plan yet, start with the getting started guide. Z9VPN accounts don’t require an email address.
When choosing a client, check both the supported protocols and the subscription format. Shadowsocks, VMess, Trojan, VLESS, Hysteria2, and TUIC are different proxy protocols or solutions, and not every Android client supports them all. Support for a protocol doesn’t mean a client can read every configuration file; it also needs to handle rules, DNS, and any extended fields in the configuration. Follow the import instructions in your account panel, and don’t rename protocols to try to clear an error.
| Item | Purpose | What to expect | Common misconception |
|---|---|---|---|
| Client installer | Install and run the app | The app opens to its configuration screen | Assuming installation means you’re connected |
| Subscription link | Get and update configurations | Available configurations or servers appear | Pasting the account panel login URL |
| System VPN permission | Allow the app to handle selected traffic | Android shows that the VPN is connected | Assuming permission will fix server issues |
| Background and battery settings | Reduce the chance that Android pauses the app | The connection stays active or recovers after switching apps or locking the screen | Locking the app in recent tasks but ignoring battery restrictions |
Import the subscription: Check it, then enable the configuration
- Copy the right link. In your account panel, find the subscription option for your client and use the copy button to avoid missing parameters. Subscription links may contain access credentials, so don’t post them in public groups or show them in screenshots.
- Add a remote configuration. In the client, look for an option such as “Subscription,” “Configuration,” or “Import from URL.” Paste the link and save it. Labels vary between apps; the important thing is to create a remote configuration that you can update later.
- Update the configuration. Wait for the client to finish downloading and parsing it. If the name appears but no servers do, check the update status or logs. Don’t keep creating configurations with the same name.
- Enable the configuration and select a server. Set the new configuration as active, then choose an exit server in the proxy group or server list. Keep the default rules provided by the service, then connect.
“Download failed” and “Parse failed” point to different issues. For a download failure, check whether your current network can reach the subscription URL, whether your plan is active, and whether the link has been reset. For a parse failure, check the format and client version. A successful download with no servers may mean you chose the wrong subscription type. Keep your working configuration before updating so you can revert if needed.
VPN permission: What to expect from Android’s confirmation prompt
When you connect for the first time, Android usually displays a VPN connection request. Make sure the app named in the prompt matches the client you just installed, then confirm. This permission lets the app use Android’s VPN interface to create a virtual network tunnel and handle traffic according to its configuration. It is not the same as access to contacts or photos, nor does it certify that the service is secure.
Android typically allows only one system VPN connection at a time for a user or work profile. If another network tool, ad blocker, or corporate VPN is already using the interface, starting a new connection may disconnect it. Check Android’s VPN settings, pause the conflicting app, and try again. Work profile restrictions may also be set by your organization.
After connecting, check the client’s status and Android’s status bar, then open the site you want to use. Some clients have a “proxy only” or similar mode that doesn’t route traffic from every app. This guide assumes the client is running through Android’s VPN interface. Don’t rely only on the color of the toggle on the app’s home screen.
Android’s “Always-on VPN” and “Block connections without VPN” are additional settings, not prerequisites for your first connection. The latter can block network access if the tunnel drops. Verify that the connection works normally first, then enable these options if needed—and make sure you know how to restore network access if the connection fails.
Battery settings: Fix disconnects when the screen is locked
If the VPN works in the foreground but fails after you switch apps or lock the screen, check for background restrictions first. Open the client’s app details in Android settings and change its battery setting from restricted to allow background activity, unrestricted, or not optimized. Menu names vary by Android version and manufacturer, so there’s no single path that works on every device.
Some Android versions have separate settings for auto-start, background launch, or background data. Check these options for the client, and make sure Data Saver isn’t blocking its background network access. Locking the app in recent tasks may help keep it available, but it doesn’t replace battery permissions.
- ✅ In the client’s app settings, allow the background activity it needs.
- ✅ If there are separate auto-start or background data settings, check whether they restrict the client.
- ✅ Lock the screen and wake the device again. Check the VPN status, client logs, and whether the app you’re testing can still connect.
- ❌ A battery exception won’t make your connection faster; it mainly affects background activity and recovery.
If the client supports a persistent notification, keep it enabled as instructed and check its notification permission. A visible notification doesn’t guarantee that the process will keep running, so test the connection with the screen locked. Allowing more background activity can use more battery, so adjust settings only for clients that need a persistent connection—not every app.
Verify the connection: Exit IP, routing, and DNS
First check that ordinary websites load, then test the international site or app you want to use. To compare your exit IP, use the same trusted IP lookup site before and after connecting, and make sure the lookup domain is routed through the proxy. The exit region tells you how that request was routed; it doesn’t prove that every app on your device is using the tunnel or that you meet a platform’s regional requirements.
Rule-based mode routes traffic based on criteria such as domains, IP addresses, or apps, so services in mainland China may still connect directly. If only one app fails, check whether it’s excluded from the VPN or matched by a direct-connection rule. You can temporarily switch to the client’s global proxy mode for comparison, then restore your original rules after testing. If websites work in a browser but not in an app, also check the app’s cache, account region, and how it handles network connections.
Check DNS against your actual configuration. Android Private DNS, secure DNS in your browser, and the client’s DNS rules can all affect how requests are resolved. Seeing a particular resolver on a test page doesn’t by itself prove there’s a leak. Check whether queries that should be handled by the proxy are taking a different route. If a domain won’t resolve, change one related setting at a time and note its original value so you can identify the cause.
When Android shows that the VPN is connected, it means the interface is active. UDP forwarding also depends on the protocol, client settings, server, and current network. If websites load but calls or games don’t work properly, check those factors separately instead of assuming every issue is caused by insufficient bandwidth.
Troubleshooting: Narrow down the cause by symptom
Servers are listed, but all requests fail
Check that the configuration is enabled, the proxy group is using a working server, and your plan and data are in good standing. Look for DNS, handshake, or certificate errors in the logs. For certificate errors, first check the device’s date and time and where the configuration came from; don’t hide the issue by skipping certificate verification. Then try another network to distinguish a local network restriction from a configuration problem.
One server fails, but others work
Keep using a working server, update the subscription, and compare again. IEPL dedicated lines, relay routes, and direct connections describe how traffic is routed—not the protocol used by the client. A dedicated line uses reserved capacity, a relay forwards traffic through an intermediate server, and a direct connection skips relays arranged by the service. Actual performance still depends on your network and the exit server. A server name can’t guarantee a faster connection; check the route details on the servers page.
The connection fails after switching networks or only when the screen is locked
Switching networks changes the underlying connection, so the client may need to establish a new session. Try reconnecting first, then check the auto-reconnect setting. If the problem occurs only in the background, review battery and background permissions. If it also happens in the foreground, note the network and server name, redact sensitive details from the logs, and contact support through a support ticket.