Push Notification Troubleshooting by Phone Model

Sometimes, push notifications don’t show up on your phone because of battery optimization, background app restrictions, or notification settings specific to your brand of device. Different phone brands handle apps differently, so it’s important to follow the right steps for your device.


🚨 Why This Happens

We’ve observed that many recent complaints of missing notifications occur due to:

  • Blockers set at the device/power management level

  • Customized Android operating systems used by certain brands like Oppo, Vivo, and iQOO

Unlike stock Android, these brands use their own custom skins that aggressively restrict background apps, leading to delayed or missing notifications. This problem is not limited to DoubleTick — it also affects many other apps like Gmail, WhatsApp, and banking apps.


🖥️ Understanding Custom OS (For Oppo, Vivo, iQOO Users)

  • ColorOS – Used by Oppo and, in some regions, OnePlus and Realme. Includes strict battery optimization rules that may block notifications.

  • Funtouch OS – Used by Vivo and iQOO (a sub-brand of Vivo). It controls background apps aggressively, which often interrupts notifications.

  • iQOO UI – A custom layer on Funtouch OS, with the same restrictions.

👉 Although ColorOS and Funtouch OS share some codebase (since Oppo, Vivo, OnePlus, and iQOO are all under BBK Electronics), they are managed separately. Still, the common issue is aggressive background process control, which directly impacts DoubleTick notifications..


Xiaomi Phones (MIUI)

Xiaomi devices are aggressive in saving battery, which often causes apps like DoubleTick to stop running in the background.

  1. Battery Optimization

This prevents MIUI from putting DoubleTick to sleep when the phone is idle.

  • Go to Settings → Battery Optimization.

  • Search for DoubleTick in the list.

  • Select No restrictions.

  1. Auto-start Permission

Without this, DoubleTick won’t start automatically after you restart your phone.

  • Go to Settings → Permissions → Auto-start.

  • Find DoubleTick and turn it ON.

  1. App Notifications

This ensures notifications appear on top and aren’t delayed.

  • Go to Settings → Notifications → App Notifications.

  • Open DoubleTick and enable Show Notification and Priority.


Vivo Phones

Vivo phones often block background activity to save battery, which can delay notifications.

  1. Auto-start

Ensures DoubleTick runs after a restart.

  • Go to Settings → Permissions → Auto-start.

  • Turn on auto-start for DoubleTick.

  1. Battery Consumption Settings

Prevents Vivo’s battery saver from stopping DoubleTick in the background.

  • Go to Settings → Battery → High background power consumption.

  • Allow DoubleTick here.


Oppo Phones

Oppo uses "Protected Apps" to control which apps can run freely.

  1. Protected Apps

This keeps DoubleTick safe from being force-stopped by the system.

  • Go to Settings → Advanced Settings → Battery Manager → Protected Apps.

  • Enable DoubleTick.

  1. Notification Settings

Without this, messages might arrive silently or not at all.

  • Go to Settings → Notification Panel & Status Bar → Notification Center.

  • Enable DoubleTick for both notification and priority display.


OnePlus Phones

OnePlus users often face delayed notifications because of aggressive “Battery Optimization.”

  1. Battery Optimization

Prevents DoubleTick from being killed in the background.

  • Go to Settings → Battery → Battery Optimization.

  • Find DoubleTick → Don’t Optimize.

  1. Recent App Management

Deep Clear removes DoubleTick from memory, so messages won’t arrive until you reopen the app.

  • Go to Settings → Advanced → Recent App Management.

  • Select Normal Clear instead of “Deep Clear.”


Lenovo Phones

Lenovo devices need apps to be manually whitelisted.

  1. Background App Management

Allows DoubleTick to start automatically and keep running in the background.

  • Go to Settings → Power Manager → Background App Management.

  • Enable DoubleTick.


Asus Phones

Asus has strict memory and power management rules.

  1. Background App Management

    • Go to Settings → Power Manager → Background App Management.

    • Enable DoubleTick.

  2. Protected App List

Keeps DoubleTick active even during memory clean-ups.

  • Open Mobile Manager → Boost → Super Boost.

  • Add DoubleTick to the Protected App List.


Samsung Phones

Samsung usually delivers notifications well, but sometimes settings get turned off by mistake.

  1. App Notifications

This ensures system-wide permission for DoubleTick alerts.

  • Go to Settings → Apps → DoubleTick → App Settings.

  • Toggle the Allow Notifications button.

  1. Lock Screen Notifications

Lets DoubleTick messages appear even when your phone is locked.

  • Go to Settings → Lock Screen & Security → Notifications on Lock Screen.

  • Set to Show Content.


👉 Pro Tip: After changing these settings, restart your phone once. This makes sure the new permissions take effect.

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