Cannot Connect, Slow, or Dropping: What to Check

1. Is the account still valid? Expiry is the number-one cause; log in to the site and check the title bar. A new account needs a trial or a payment before it has any time.
2. Is the device clock right? Encrypted connections require the time to be within a few minutes; enable automatic time on phones and computers. A Cisco “untrusted certificate” prompt usually means this too.
3. Change region. A region’s entry being interfered with by the carrier is common; another region usually connects.
4. Change method. The same account works with the others: if the UDP methods (sing-box, private network, OpenVPN) fail, switch to Cisco over TLS. If that connects, the protocol was being interfered with, not the account.
5. Disable security software and retry. On PCs, 360 and Kingsoft-style suites intercept encrypted connections — uninstall and reboot; on Windows the sing-box core may be quarantined, so restore it from Windows Security’s protection history and add an exclusion.
6. Restart the router and the modem. Huawei, Xiaomi and TP-Link routers, and telecom modems that have not been restarted in ages, cause exactly this.

1. First measure local speed without the route as a baseline (speedtest or the carrier’s test). If that is slow, no route will help.
2. Choose region by carrier: northern Unicom try Japan and Korea; southern Telecom try Southeast Asia or Australia; other broadband try the China entry. Check the load lights on the region list and pick a green one.
3. Is it 8–11 pm? Fast by day and slow at night is congestion, not a fault; in that window changing region beats reconnecting.
4. Change protocol. On lossy networks sing-box’s hysteria2 is faster. When testing, choose an overseas test node — a domestic node cannot measure the cross-border link; with the web proxy, add the test site to the rules or switch to global temporarily, or you are measuring home broadband.

1. Phone battery saver: Android’s background limits kill the client — whitelist it and disable battery optimisation for it.
2. Switching between Wi‑Fi and mobile data always rebuilds the connection; that is normal. The private network (Tailscale) recovers on its own; other methods need one reconnect.
3. If it keeps dropping, switch to the web proxy: request by request with no long-lived connection, it never drops — at the price of routing only the browser.

• LAN devices unreachable or Chinese sites slow after connecting: Cisco routes everything, so inside China run the split-routing script from the Cisco section; sing-box switches to auto split in the client, the web proxy in the extension.
• The site’s “current network” still shows your home carrier: the web proxy’s rules probably exclude this site — switch to global or add the site to the rules.
• Chinese video still shows a region notice on the China route from abroad: the device’s IPv6 or DNS is bypassing the route; see the streaming guide.
• The router admin page will not open or refuses the connection: the browser jumped to https; type the address with http:// in front.

The connection method (private network / Cisco / OpenVPN / proxy / sing-box / router), the region, and the error text or a screenshot — plus the exact time. With those, most problems are located on the first reply; the support groups are on the contact page and the AI agent is on duty around the clock.