FAQ

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All topics 20
APP & client 14
Super VPN (browser) 3
Payment, account & usage 2
Other 1

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.

Link to this question

Do I need a VPN when traveling to China? Can I use my international SIM card?

If you are only visiting China for a short time and do not rely heavily on international services, roaming with your international SIM card is possible. Most major providers (AT&T, Vodafone, T-Mobile, etc.) offer roaming in China, and these connections often bypass the Great Firewall (GFW), allowing direct access to global services. However, note: