# 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 β€” it also affects many other apps like Gmail, WhatsApp, and banking apps. *** ### πŸ–₯️ 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. πŸ‘‰ 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 β†’ Battery Optimization**. * Search for **DoubleTick** in the list. * Select **No restrictions**. 2. **Auto-start Permission** Without this, DoubleTick won’t start automatically after you restart your phone. * Go to **Settings β†’ Permissions β†’ Auto-start**. * Find **DoubleTick** and turn it **ON**. 3. **App Notifications** This ensures notifications appear on top and aren’t delayed. * Go to **Settings β†’ Notifications β†’ 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 β†’ Permissions β†’ Auto-start**. * Turn on auto-start for **DoubleTick**. 2. **Battery Consumption Settings** Prevents Vivo’s battery saver from stopping DoubleTick in the background. * Go to **Settings β†’ Battery β†’ 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 β†’ Advanced Settings β†’ Battery Manager β†’ Protected Apps**. * Enable **DoubleTick**.
2. **Notification Settings** Without this, messages might arrive silently or not at all. * Go to **Settings β†’ Notification Panel & Status Bar β†’ Notification Center**. * Enable **DoubleTick** for both notification and priority display. *** #### **OnePlus Phones** OnePlus users often face delayed notifications because of aggressive β€œBattery Optimization.” 1. **Battery Optimization** Prevents DoubleTick from being killed in the background. * Go to **Settings β†’ Battery β†’ Battery Optimization**. * Find **DoubleTick β†’ Don’t Optimize**.
2. **Recent App Management** Deep Clear removes DoubleTick from memory, so messages won’t arrive until you reopen the app. * Go to **Settings β†’ Advanced β†’ Recent App Management**. * Select **Normal Clear** instead of β€œDeep 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 β†’ Power Manager β†’ Background App Management**. * Enable **DoubleTick**. *** #### **Asus Phones** Asus has strict memory and power management rules. 1. **Background App Management** * Go to **Settings β†’ Power Manager β†’ Background App Management**. * Enable **DoubleTick**. 2. **Protected App List** Keeps DoubleTick active even during memory clean-ups. * Open **Mobile Manager β†’ Boost β†’ 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 β†’ Apps β†’ DoubleTick β†’ App Settings**. * Toggle the **Allow Notifications** button. 2. **Lock Screen Notifications** Lets DoubleTick messages appear even when your phone is locked. * Go to **Settings β†’ Lock Screen & Security β†’ Notifications on Lock Screen**. * Set to **Show Content**. *** πŸ‘‰ **Pro Tip:** After changing these settings, restart your phone once. This makes sure the new permissions take effect. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://learn.doubletick.io/settings/push-notifications/push-notification-troubleshooting-by-phone-model.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.