This article addresses the common issue of “What to do if v2rayNG won’t connect”: checking step by step from mobile network, system permissions, node information, subscription updates, to protocol settings. It is suitable for ordinary users to troubleshoot item by item using a checklist and does not involve self-hosted server configuration.
1. First, make sure your connection environment is normal
Many connection failures are not caused by v2rayNG itself being broken, but by the current network or phone environment blocking the connection. It is recommended to start with the following basic checks:
- Switch networks: switch once between Wi-Fi and mobile data; if your company, campus, or hotel Wi-Fi has many restrictions, prioritize testing with mobile data.
- Turn off other proxy tools: do not enable Clash, sing-box, or other VPN apps at the same time, to avoid port or routing conflicts.
- Check system time: inaccurate phone time or time zone may cause TLS certificate verification to fail. Go to system settings and enable “Set time automatically.”
- Confirm VPN permission: when connecting for the first time, Android will pop up a VPN connection request, and you must tap “OK”; if it does not appear, restart the phone and try again.
- Disable battery-saving restrictions: on some phones, background restrictions may cause v2rayNG to disconnect right after connecting, so allow background activity in app management.
2. Check whether nodes and subscriptions are available
If the environment is fine, the next step is to check the nodes. Free nodes often fail to connect because they expire, become congested, get blocked, or have configuration changes, so do not test only one node.
- Open v2rayNG, long-press the current node, and select “Test current configuration with real connection” or a similar test option.
- If you see messages such as timeout, connection refused, or EOF, try other nodes in the same subscription.
- Open the menu in the upper right corner and run “Update subscription” to avoid using outdated configurations.
- Make sure the imported link is complete and that vmess://, vless://, trojan://, or the subscription address was not copied incompletely.
This site compiles some free nodes for testing, but the stability of free resources cannot be guaranteed. When troubleshooting, it is recommended to prepare at least 2–3 nodes from different sources, so that a single failed node is not mistaken for a client problem.
3. Verify common v2rayNG settings
In v2rayNG, mismatched protocol parameters can also prevent connections. Ordinary users do not need to understand all the underlying principles, but they should know how to check a few key points:
- Confirm the protocol type: VLESS, VMess, Trojan, and Shadowsocks cannot be mixed. After importing from a QR code or link, do not change the protocol casually.
- Check the transport method: common options include tcp, ws, grpc, httpupgrade, etc.; if a node requires ws but was changed to tcp, it will fail.
- Review TLS settings: if the node requires TLS, it must be enabled; if it requires special security methods such as Reality or XTLS, keep the original configuration as well.
- Do not manually change the domain or port at random: unless the node provider clearly instructs otherwise, keep the imported address, port, UUID, and path unchanged.
If you have changed many options before, the fastest solution is to delete that node and re-import it from the subscription or QR code to restore the original configuration.
4. What to do if the connection succeeds but web pages still won’t open
Sometimes v2rayNG shows that it is connected, but the browser still cannot access external websites. You can try the following:
- In v2rayNG settings, enable “Bypass LAN and mainland China addresses” or use the default routing rules.
- Change DNS back to the default, or try enabling in-app DNS to avoid DNS pollution from your carrier affecting resolution.
- Clear browser proxy extensions; mobile browsers generally do not need extra proxy settings.
- Restart v2rayNG, then restart the browser, and if necessary restart the phone.
5. Quickly determine where the problem lies
If multiple nodes all fail, first suspect the network environment, system permissions, or client version; if only one node fails, it is most likely that the node has expired or has incorrect parameters. It is recommended to update v2rayNG from the app store or a trusted release page to avoid older versions not supporting newer protocols. The troubleshooting order can be remembered as: switch network → update subscription → switch node → re-import → check permissions → upgrade the client. Going through this checklist usually helps identify the main reason why v2rayNG cannot connect.