FAQ
5UF VPN Push Notification Test – FAQ (English Version) 
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:
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✅ Delivered
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❌ 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:
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Android devices in China not supporting Google FCM
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Manufacturer ROM restrictions (MIUI, EMUI, ColorOS, etc.)
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Aggressive battery optimization
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Network policy conflicts
Regular testing is recommended.
3. Special Notice for Android Devices in Mainland China (Important)
Android devices sold in Mainland China:
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❌ Often do not support Google FCM
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❌ May restrict overseas push channels
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❌ 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:
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Huawei: Battery → App Launch Management
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Xiaomi: App Management → Battery Saver
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OPPO / vivo: Background Freeze Management
4. What if the test shows “Failed”?
Please check:
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Notification permissions are enabled
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Network connection is stable
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Restart the device
Some Android systems temporarily suspend push channels.
5. Delivered but no popup?
Possible reasons:
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You were using the app
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Notification was delivered silently
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Marked as low priority
Check your notification history.
6. Does VPN status affect push delivery?
Generally no.
However, delays may occur when:
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Switching VPN nodes
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Experiencing unstable network
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Device enters deep power-saving mode
7. When should I test?
Recommended after:
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Changing devices
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Updating system
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Updating 5UF VPN
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Suspecting missed notifications
8. Why are push notifications important?
Push notifications ensure you receive:
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🔔 Customer support replies
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🔔 Account alerts
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🔔 Service maintenance notices
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🔔 Security updates
This is especially important for VPN users.
9. Still not working?
Please contact support in the app and provide:
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Device brand & model
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OS version
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Screenshot of test result
We’ll assist you further.
