This article addresses the common issue of “what to do if v2rayNG won’t connect”: from mobile network, node information, subscription updates, and system permissions to log messages, it walks you through troubleshooting step by step using a checklist. It is suitable for ordinary users to follow directly and does not involve setting up a self-hosted server.
1. First, confirm the basic connection environment
Many connection failures are not caused by a broken client, but by problems with the network environment or node status. It is recommended to check in the following order first, to avoid repeatedly uninstalling the App right away.
- Switch networks: switch from Wi-Fi to mobile data, or test the other way around; company, campus, or hotel Wi-Fi may restrict proxy connections.
- Check your phone’s time: go to system settings and enable “Set time/time zone automatically.” Incorrect time may cause TLS handshake failures.
- Turn off other VPNs: keep only one VPN connection, v2rayNG, active at a time to avoid conflicts with boosters or ad blockers.
- Check whether the node has expired: free nodes usually have a short validity period, so if timeouts happen repeatedly, update the subscription or switch nodes first.
2. Check v2rayNG nodes and subscriptions
Open v2rayNG, long-press the current node, and select “Edit” or “View configuration.” Focus on whether fields such as address, port, UUID, transport protocol, TLS, and SNI are empty or were changed by mistake. If you imported by copying from this site’s free node page, it is recommended to copy the full link again instead of copying only part of it.
- If using a subscription: tap the menu in the upper-right corner, select “Subscription settings,” confirm that the subscription address is complete, then tap “Update subscription.”
- If importing from the clipboard: after copying a complete sharing link such as vmess, vless, or trojan, tap “Import from clipboard” in the upper-right corner.
- If QR code import fails: switch to importing by copying the link to avoid recognition errors caused by screenshot compression.
After importing, select one node first, tap the V-shaped button in the lower-right corner to start it, then open a common website in the browser to test. Do not click multiple nodes frequently at the same time, as it is easy to misjudge the current connection status.
3. Identify common issues based on the prompts
If it still won’t connect, go to the menu in the upper-right corner and check the “Logs.” Ordinary users do not need to understand everything; you only need to watch for these keywords:
- If you see timeout or i/o timeout: the node is most likely unreachable, the network is blocked, or the port is restricted. It is recommended to switch networks or switch nodes.
- If you see handshake, TLS, or certificate: first check your phone’s time and whether the TLS switch or SNI/host has been changed.
- If you see refused or closed: the node may have failed or the server is refusing the connection. Try again after updating the subscription.
- If there is no change in the logs at all: check whether v2rayNG has VPN permission, or whether it is being restricted in the background by the system’s power-saving policy.
4. Also check Android system settings
Some Android systems from Chinese manufacturers restrict background network access. Go to system settings, find v2rayNG, and allow “Run in background,” “Auto-start,” and “Unrestricted battery usage.” Also check whether VPN permission has been granted; when the connection request pops up on first launch, you must tap allow.
If you are using Android 12 or above, you can also try turning off “Private DNS.” The path is generally: Settings — Network & Internet — Private DNS, then change it to Off or Automatic. Some DNS settings can affect domain name resolution, causing the node to appear normal while webpages still won’t open.
5. Final quick troubleshooting order
It is recommended to proceed in this order: first restart v2rayNG, then update the subscription, then switch between 2–3 nodes, then switch networks, and finally restart the phone. If only one specific node fails, it is usually a problem with that node; if all of them fail, focus on checking the network environment, system permissions, and client version.
In summary: when v2rayNG won’t connect, do not focus only on the “start button.” Troubleshoot in the order of “network environment — subscription nodes — log prompts — system permissions,” and you can usually identify most problems. Free nodes can be unstable, so it is recommended to keep multiple working nodes ready and update subscriptions regularly.