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When you hit connection issues, unstable speed, or anything hard to reproduce, rich diagnostics help us troubleshoot much faster.

Recommended (best): use the in-app ticket / feedback flow. In recent builds you can attach profiles, network diagnostics, speed-test results, and detailed logs right inside the ticket so support can triage quickly.

Can't find the ticket entry? Open Help → About (or the equivalent section in your client) — you'll usually find shortcuts to logs and network diagnostics there; export or capture what you can, then reach out through whichever channel you prefer.

Tips: try to reproduce once before sending, note time, network type (cellular vs Wi‑Fi, rough region), and your app version; it speeds things up.

To see which country or region your Apple ID is registered in (for example US, Hong Kong, etc.), use Apple’s official account site.

Recommended: sign in with your browser and open the account information section—look for Country or Region.

Direct link (sign in required): Apple ID — Account information

Note: menus may vary slightly by language or iOS version. On iPhone you can also check under Settings → Apple ID → Media & Purchases / Payment & Shipping, or the region shown for the App Store account.

Your region affects which apps appear in the App Store and which payment methods are available. Use an Apple ID that matches the storefront you need, and follow Apple’s terms.

A VPN adds an encrypted tunnel between you and the internet, which lowers the chance of casual eavesdropping on plain HTTP in untrusted networks. Below is a practical checklist plus notes on privacy, technology, and how we operate.

1. Install only from official sources

• Use official app stores on mobile and the official 5UF website (or links we publish) on desktop; verify the domain before installing.
• Avoid “cracked” builds and random APK shares. Many free or unknown VPNs have a poor track record for ads, data resale, or malware.

2. Account work only on real HTTPS sites

For login, billing, or subscription pages, confirm a trusted domain and HTTPS in the address bar.

3. After connecting, test your IP and DNS (recommended)

With the VPN on and other proxies off, open BrowserLeaks — My IP Address to see the exit IP and rough region. The same site offers DNS leak and WebRTC tests. Results depend on split tunneling, extensions, and dual-stack networks—use them as signals, not a single proof.

4. Can ISPs or police “know I use a VPN”?

Technically, providers often see that your device talks to a remote endpoint with encrypted traffic, volume, and timing. They generally cannot read your HTTPS page contents the way they could with old plain HTTP. Sites and modern apps add another layer of end-to-end TLS that the VPN operator normally cannot decrypt either. What authorities may obtain still depends on law and due process—a VPN is not invisibility.

5. Xray-based stack

Our service commonly builds on open projects such as Xray (for example XTLS/Xray-core) with transports like Trojan wrapped in TLS. Open source enables community review; it is not the same as a formal proof against every adversary, but it is far more inspectable than a closed black box. Keep clients updated and download only from trusted sources.

6. What can the operator see?

In typical HTTPS browsing, we cannot decrypt the payload between you and the website. Exact data categories are spelled out in our privacy policy.

7. Singapore company and compliance

We are incorporated in Singapore and operate under its legal framework. The privacy policy explains retention, security practices, and how we may respond to lawful requests. We do not treat selling user privacy as a business model. Read the policy on our site; open a ticket for questions.

8. Bottom line

No VPN replaces good hygiene—official clients first, skepticism toward “free” unknown VPNs, and regular updates. Report suspicious clones through official channels.

Relay (transit) nodes send traffic to a relay inside mainland China first, then forward it toward overseas destinations over dedicated or optimized backhaul. That path is often more predictable than raw public-internet crossings, which can mean better stability and higher peak performance for cross-border use. Building and operating relays costs more, so relay plans may differ from plain direct routes in pricing or lineup.

Direct nodes rely more on the public internet, connecting straight to overseas servers. Cross-border public paths may see packet loss, throttling, or intermittent blocking in some regions or hours. Even when a route works, speeds can plunge at busy times. If you are in mainland China and need reliability, relay lines are usually the safer choice.

5UF is among the few providers that can offer lawful mainland relay capacity alongside standard options. We also tune routing for selected sites and services. Example: some Hong Kong nodes may not work well with OpenAI ChatGPT over a plain path, but with relay and routing optimization, Hong Kong and similar regions can reach those AI services more reliably. If a specific AI site or service fails for you, contact support so we can prioritize routing fixes.

Available nodes depend on the app and the list on our site; plans differ in node types and counts. See your subscription details for what applies to you.

The 5UF VPN app offers quick connectivity tests from the server list screen: tap Speed test at the top right (sometimes next to a settings icon), open Connectivity test, then pick a method.

Three test modes

1. TCP: Measures how long it takes to complete a TCP handshake to each server host and port. The app runs multiple probes and shows an average so you can compare routes quickly.
2. ICMP: Sends ICMP echo (ping) to the server hostname, similar to the ping tools built into desktop and mobile systems, to see round-trip latency.
3. CONNECT: Issues an HTTP(S) request to a test URL through the proxy path, which best mimics real VPN usage. It is usually the slowest mode, but in heavily restricted networks it helps find nodes that still work. You can change the test URL under URL test settings.

Before testing, disconnect all VPN and proxy software, including this app. Otherwise traffic may still go through a tunnel and the numbers will not reflect your raw local path.

Mainland China: Strict blocking may make some overseas nodes unreachable; that can be normal. Use the Available in China category for optimized dedicated lines that aim to stay usable under heavy filtering, with carrier hints for China Mobile, China Unicom, and China Telecom. Pick a line that matches your ISP or SIM.

Choosing a server: Auto-select uses TCP results, then picks one server at random from among the fastest, balancing speed and load. You can also browse by geography (for example Asia, Americas, Europe) and choose manually.

Major releases and infrastructure changes are announced under News. The app may also show its own upgrade prompts—follow in-app release notes when you update.

To use a third-party client on macOS, install Sing-box VT from the Mac App Store (third-party software, not published by 5UF). 5UF serves a Trojan (Xray) compatible profile as a sing-box subscription that includes server lists and routing rules.

1. Install the app

You need a non-Mainland-China Apple ID. Install from the App Store: Sing-box VT

2. Copy your sing-box URL

Sign in to the 5UF user panel in a browser and open the Xray (Trojan) configuration page (typically /xray_config). Copy the full sing-box configuration subscription URL with the one-click copy button.

That URL embeds your private UUID—do not share it. If it may have leaked, use Change UUID on the same page so the old URLs stop working immediately, then copy the new sing-box link and import again.

3. Import into Sing-box VT

In the app, add or update a profile by importing from URL / subscription (wording depends on the app version), paste the copied link, save, and let the app refresh nodes and rule sets.

4. Connect and test

Enable the profile and visit any site that shows your public IP to confirm traffic exits through the VPN. If import or connection fails, check that the URL was copied completely, your account is active, and the network is not blocking the endpoints; generating a new UUID and re-importing often resolves stale links.

Screenshots (UI may change between releases):

For the official all-in-one experience, use the 5UF VPN Mac app from our site. This article targets users who prefer the sing-box ecosystem.

The latest official 5UF VPN app for Windows is built and tested for newer Windows releases. On Windows 7 and Windows 8, which are largely out of mainstream support, you may see install failures, startup issues, or connection problems. We cannot guarantee the same experience as the new app on those systems in the near term.

If you must stay on an old Windows version, consider one of the following:

• Upgrade Windows to a supported release your hardware can run (for example Windows 10 or 11), then install the latest official app; or
• Use a legacy Windows build of our client where still supported (feature and security updates may lag; follow site or support guidance); or
• Use Super VPN (browser extension) for browser-based access; or
• Use a third-party VPN client with manual setup: How to use a third-party app with 5UF VPN on Windows (tutorial).

Whenever possible, we still recommend a supported OS + latest official app for the best stability and security.

Make sure 5UF VPN is the latest version from the App Store. Builds 5.3 and newer officially support iOS 16 and later, fixing most cases where the app could not run on iOS 16. If your iPhone or iPad runs iOS 16+, update the app to 5.3 or higher (use the version number shown in the App Store).

More details: iOS client update announcement.

On iOS 15 or earlier, or if the hardware cannot upgrade to iOS 16+, the official app may still be limited. You can:

• Upgrade iOS as far as your device allows, then install or update the official app; or
• Use a third-party VPN client with 5UF where appropriate.

Tutorial: How to use a third-party app with 5UF VPN

If issues remain on 5.3+, contact support with your iOS and app version.

The availability test simulates requests to dedicated check URLs for selected apps. Based on what comes back, it can help you gauge whether your current network can reach those apps and whether you appear to fall into a given country or region’s service area.

Please note: results are not guaranteed to be accurate, and not every service can clearly report a country or region. The feature is meant for a quick, practical snapshot of app reachability in your current environment—not a definitive geo or compliance check.

Many availability checks are built in. You can add or remove the apps you care about in Settings.

Each run is very fast, uses very little data, and has a minimal resource footprint on your device.

On the 5UF VPN (V5) home screen, the speed test sends a very small HTTP request to our dedicated test page. The page only shows your egress IP, so data usage is minimal and it should not meaningfully affect your allowance or billing.

The test measures network latency (how quickly you can reach a given node), not your maximum download speed. Unlike many tools that download large files to estimate peak bandwidth, we focus on round-trip delay to that node only.

We take multiple samples and show an average. Lower numbers mean faster response (lower latency) to that node.

If the app reports that the connection limit has been reached but you confirm you are not actually using more devices than your plan allows, wait a short while first: the system will usually remove stale sessions automatically.

If it still does not clear after about five minutes and you confirm no one else is sharing the account, you can:

• Open the online sessions page in a browser (sign in required): /transferlog/vpn/online/1/
• Or in the app: go to Settings, open your profile card, tap Online connections, then swipe left on a session to force disconnect it.

Important: If a device is actively using the VPN, a forced disconnect may reconnect immediately. Stop or disconnect the VPN on that device first, then force the session offline if needed.

If you are using the latest 5UF VPN app, long-term connection failure is usually uncommon.

If you are on an older iOS release (for example iOS 15 or earlier) or you cannot use the official app on your device, you may hit compatibility or installation limits. Use a third-party VPN client with 5UF and follow this guide: How to use a third-party app with 5UF VPN (tutorial). The reinstall, speed-test, and ticket steps below mainly apply when you can run the official app.

On iOS 16 or later, update the official app to 5.3 or newer from the App Store before the steps below.

If the VPN cannot connect, the Connect button does nothing, throughput feels sluggish, or you are connected yet nothing resolves over the tunnel, work through this checklist:

1. What if tapping Connect does nothing?

This is usually not caused by the server itself. In most cases, the app was denied VPN permission the first time it asked the system to create the VPN connection.

The fastest solution is to reinstall the app.

• Uninstall the current app
• Install the latest 5UF VPN app again
• When you tap Connect again, allow the system to create the VPN connection

If the first permission request was denied, the system often will not properly trigger the VPN authorization flow again, so reinstalling is usually the fastest and simplest solution.

2. What if the VPN connects but the speed is slow?

The latest app already includes built-in speed testing and app availability checks on the home page, so you can evaluate the current network condition before switching servers blindly.

• You can test latency for servers in different countries from the home page
• In general, a result of under 1 second is considered relatively normal
• After switching to another server, the app can test again so you can compare quickly
• The app also checks availability for major services such as TikTok
• It can also help you identify which service region the current server is closer to, such as Japan or Hong Kong

These tools help you quickly understand whether the problem is caused by the current server, your current network environment, or the service you are trying to use.

3. The tunnel shows connected, but absolutely nothing loads — then what?

If the VPN connects successfully yet browsers and apps remain completely unreachable, don't assume it's only the remote node — check whether your local uplink network is blocking or rewriting traffic.

• Switch networks (Wi‑Fi vs cellular vs another ISP hotspot). If browsing works normally on another network, the issue is likely specific to your previous network exit.
• Clarify whether this ever worked before on the same network, or started only recently — that timeline narrows investigations a lot.

When you're already in the connected-but-no-Internet situation and reinstalling, plus resetting rules to defaults/clearing custom policies, still doesn't help — try a full quit of the desktop/mobile client:

• iOS/iPad/macOS: make sure there's no lingering VPN/control icon in the menu/status area after you quit (exact UI varies). If unsure, swipe the app away from the app switcher, then reboot when needed.
• Windows: ensure the tray icon is gone — if unsure, inspect Task Manager for orphaned processes or restart Windows before launching only the 5UF client.

After a clean reopen (or reboot), open a ticket and attach network diagnostics, speed test output, app availability results, and uploaded logs wherever the form offers them — those artefacts help us troubleshoot stubborn edge cases faster.

4. What if none of this fixes it?

If you followed the checklist but the VPN stays slow, never connects, or still cannot reach anything while connected, use the integrated ticket wizard and ping support.

• Open the support ticket section in the latest app
• At the bottom of each ticket page, you will see related action buttons
• Send the test results to support
• Our support team can use your speed test, app availability test, and network diagnostic results to identify the issue faster

The ticket system now supports better email and push notifications, making it easier for us to contact you and solve the issue more quickly.

Recommendation: when you run into a problem, start with the built-in speed test, app availability check, and ticket feedback tools in the latest 5UF VPN app. This is usually faster and more accurate than describing the problem manually.

If TikTok still shows a black screen, fails to load, or redirects to Douyin even after you connect to a VPN, the problem is usually not just the IP address. TikTok also checks your current phone and network environment.

We recommend using the latest 5UF VPN app.

Quick setup:

1. Fully close TikTok first.
2. Turn on Airplane Mode and wait a few seconds.
3. While Airplane Mode is on, manually turn Wi-Fi back on.
4. Open the 5UF VPN app and connect to an available server.
5. After the VPN is connected, open TikTok.
6. Once TikTok loads normally, you can usually turn off Airplane Mode and return to normal mode.

Recommendations:

• Try to avoid Hong Kong servers, as they may affect TikTok region detection.
• For the same TikTok account, try to keep using the same server to avoid cross-region recommendations.
• If one server does not work well, switch to another server in the same region instead of changing countries too often.

If it still does not work:

• Switch between Wi-Fi and mobile data, then try again.
• Change to another non-Hong Kong server.
• Fully close TikTok and reopen it.

For long-term stable TikTok use, keep using the latest 5UF VPN app and try to maintain a stable server and network environment.

1. What is the Push Notification Test?

To ensure you receive customer support replies, account alerts, and important service updates, 5UF VPN now includes a Push Notification Test feature.

Tap “Start Test,” and a test notification will be sent to your device. The result will show:

• ✅ Delivered

• ❌ Failed

This helps you verify whether push notifications are working properly.

2. Why do VPN apps face more push issues?

VPN apps are more likely to encounter push delivery issues due to:

• Android devices in China not supporting Google FCM

• Manufacturer ROM restrictions (MIUI, EMUI, ColorOS, etc.)

• Aggressive battery optimization

• Network policy conflicts

Regular testing is recommended.

3. Special Notice for Android Devices in Mainland China (Important)

Android devices sold in Mainland China:

• ❌ Often do not support Google FCM

• ❌ May restrict overseas push channels

• ❌ Frequently disable background connections

You may need to:

1️⃣ Enable Auto Start

Settings → App Management → 5UF VPN → Allow Auto Start

2️⃣ Disable Battery Optimization

Settings → Battery → App Power Management → No Restrictions

3️⃣ Allow Background Activity

Make sure the app is not restricted or “deep sleeping.”

Brand-specific paths:

• Huawei: Battery → App Launch Management

• Xiaomi: App Management → Battery Saver

• OPPO / vivo: Background Freeze Management

4. What if the test shows “Failed”?

Please check:

• Notification permissions are enabled

• Network connection is stable

• Restart the device

Some Android systems temporarily suspend push channels.

5. Delivered but no popup?

Possible reasons:

• You were using the app

• Notification was delivered silently

• Marked as low priority

Check your notification history.

6. Does VPN status affect push delivery?

Generally no.

However, delays may occur when:

• Switching VPN nodes

• Experiencing unstable network

• Device enters deep power-saving mode

7. When should I test?

Recommended after:

• Changing devices

• Updating system

• Updating 5UF VPN

• Suspecting missed notifications

8. Why are push notifications important?

Push notifications ensure you receive:

• 🔔 Customer support replies

• 🔔 Account alerts

• 🔔 Service maintenance notices

• 🔔 Security updates

This is especially important for VPN users.

9. Still not working?

Please contact support in the app and provide:

• Device brand & model

• OS version

• Screenshot of test result

We’ll assist you further.

1. Close 5UF VPN completely

   • Make sure the application is fully exited.

   • Check the system tray and Task Manager to ensure no 5UF VPN processes are running.

2. Navigate to the cache folder

   • Open File Explorer and go to:

     C:/Users/user/AppData/Roaming/com.top.wuf

   • Important: Replace user with your own Windows username, as that folder represents your account.

3. Delete all files inside this folder

   • Select all files and folders inside com.top.wuf and delete them.

   • This clears any cached data that may be causing issues.

4. Restart 5UF VPN with administrator rights

   • Right-click the 5UF VPN icon and choose Run as administrator.

   • This ensures the app can rebuild its cache properly and avoids permission issues.

✅ After this process, 5UF VPN should start fresh, without old cached data causing errors or slowdowns.

If the Windows version of 5UF APP does not respond, crashes, gets stuck, or fails to open, the cause is often damaged local cache data.

Recommended steps:

1. Fully exit 5UF VPN and make sure no tray icon remains.
2. Open C:/Users/YourWindowsUsername/AppData/Roaming/com.top.wuf.
3. Delete the cached files in the com.top.wuf folder.
4. Restart the computer.
5. Right-click 5UF VPN and choose Run as Administrator.

If it still cannot start, contact support and provide your Windows version, device model, screenshot of the error, and the time when it happened.

If you are still using an older client, we recommend switching to the latest 5UF VPN app for better stability and compatibility.

• TUN mode creates a virtual network adapter on your device, intercepting and forwarding all traffic at the network (IP) layer. This ensures that all apps and services — even those that don’t support proxy settings — are routed through the VPN.

• Advantage → Full system coverage for all traffic.
• Limitation → Because it works at the routing level, connections may be less stable under certain devices or network environments.

• By attaching your system’s HTTP proxy directly to the VPN service, System Proxy offers a more stable and consistent connection.
• Advantage → Smooth, reliable, and stable performance.
• Limitation → Because some apps and websites do not support proxy mode, they may still be blocked in certain situations.

? Simplified Explanation: Two VPN Modes

? 1. Proxy Mode

✅ What is it?

Only sends specific apps’ traffic through the VPN — like browsers or apps that support proxy settings.

? Key Features:

• Works only with apps that support proxy protocols (like HTTP, SOCKS5).

• Other apps on your system don’t go through the VPN.

• Faster and lighter on system resources.

• Some apps (like games or built-in network tools) might bypass the VPN.

• More flexible — you can choose which apps use VPN and which don’t.

? Best For:

• Browsing websites

• Light or casual VPN use

• When you only want to route some traffic through the VPN

? 2. Virtual Network Card Mode (TUN/TAP Mode)

✅ What is it?

Creates a virtual network card and takes over all traffic on your device, routing it through the VPN tunnel.

? Key Features:

• Sends all traffic (web, apps, games, system services) through the VPN.

• Supports all protocols: TCP, UDP, DNS, ICMP, etc.

• More secure and complete coverage.

• Uses more system resources than proxy mode but is more stable.

• Common in VPNs like OpenVPN, WireGuard, L2TP, IKEv2, etc.

? Best For:

• Streaming video

• Online gaming

• Remote work / accessing company networks

• Full security and encryption

Need access to apps that aren't available in the Mainland China App Store? Here's a simple step-by-step guide to help you create a Hong Kong Apple ID right from your iPhone — no VPN needed.

Step 1: Go to Apple ID Website

1. Open Safari (or any browser) and go to https://account.apple.com/account#

2. Click “Create Your Apple ID” in the top-right corner.

Step 2: Enter Your Details

1. Fill in your first name, last name, and date of birth.

2. Enter a new email address (one that hasn’t been used with Apple before).

3. Choose a strong password.

4. Set your country or region to Hong Kong.

Step 3: Add Your Phone Number

• Use your Mainland China mobile number — it’s fine!

• This number will receive a verification code, so keep it nearby.

✅ Apple allows you to verify an overseas Apple ID using a Chinese phone number.

Step 4: Set the Billing Address

1. For the billing address, you can use any valid Hong Kong format.

2. Feel free to randomly fill in the address fields — just make sure it's realistic:

   • Example:

     • Street: 88 Queensway

     • District: Central

     • City: Hong Kong

     • Postal Code: 000000

     • Phone: +852 6123 4567

3. For payment method, choose None if it’s available.

   User feedback

   Some users report that None only shows when their traffic exits via a Hong Kong IP (for example, after connecting through a Hong Kong VPN node). If you still can’t set None on a phone, try a desktop browser on a network with a suitable exit (e.g. Hong Kong) and complete your Hong Kong Apple ID at account.apple.com, then sign in on the iPhone.

Tip: You can also use a Hong Kong hotel or store address for convenience.

✅ Step 5: Verify and Complete

1. Enter the verification code sent to your phone number.

2. Apple will also send a confirmation email — open it and click the link to verify.

3. Once verified, you can sign in with your new Hong Kong Apple ID.

After signing out, return to the “Media & Purchases” section and sign in using the Apple ID you just created.

This will link your new account to the App Store and allow you to download apps from the selected region.

⚠️ A Few Notes:

• Avoid switching Apple ID regions too often — it may affect app updates and subscriptions.

• Don't use iCloud syncing with multiple Apple IDs on the same device.

• If “None” isn’t showing, check that you’re on a Hong Kong (or similar) exit IP first (e.g. connect via a Hong Kong VPN). Prefer a desktop browser to create the account on account.apple.com, then sign in on your iPhone.

Frequently Asked Questions

1. Will logging out of my Apple ID under Media & Purchases affect my device?

2. If my phone number has already been linked to another Apple account, can I still use the same phone number to create another account?
Answer: Yes, you can still use the same phone number to create or verify another Apple ID. However, the number can only be associated with iMessage and FaceTime for one Apple ID at a time. You may receive a prompt to verify which Apple ID you want the number to be used with for messaging and FaceTime.
When creating a new Apple ID, keep in mind that you must use an email address that has not been previously linked to any Apple ID. Each Apple ID requires a unique email, and the same email cannot be used to create multiple accounts.

3. What to do when you want to download apps that are only available in mainland China?
Answer: You can simply choose to sign out from the Media & Purchases account and log back into it using your mainland China Apple ID. Since both accounts are yours to manage, you can switch between them as needed to access region-specific apps.