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You open WhatsApp and there are six messages you never heard arrive. Your bank’s alert shows up an hour after the payment. The delivery driver called while your phone stayed silent.
Missing or late notifications are one of the most common phone problems, and the cause is rarely a broken phone. Almost always, a setting is quietly holding them back: a Focus mode, a battery saver, or an app your phone decided to put to sleep.
Here’s the order I work through, starting with the quick checks and ending with the brand-specific settings that cause most Android delays.
First: Is It One App or Every App?
This one question saves a lot of time.
Ask someone to send you a WhatsApp message and a normal text, or send yourself an email. Then watch what happens.
- If nothing arrives from any app, the cause is something phone-wide: Do Not Disturb, a Focus mode, a power-saving mode, or a data restriction.
- If only one app is late or silent, the problem is that app’s notification settings, its battery permissions, or the app itself.
Start with the section that matches.
If Every App Is Affected
- Check Do Not Disturb or Focus. On iPhone, open Control Center and look at the Focus tile. If Do Not Disturb, Sleep, Work or any other Focus is on, notifications are being held back. On Android, swipe down and check the Do Not Disturb tile. It’s easy to switch on by accident, and schedules can turn it on automatically at night and forget to turn it off.
- Check power-saving modes. On iPhone, Low Power Mode, shown by a yellow battery icon, reduces background activity, and that can delay alerts. On Android, Battery Saver does the same. Turn them off and see if notifications return to normal.
- Check data restrictions. Notifications need an internet connection to arrive. On Android, Data Saver can stop apps using data in the background. On iPhone, Low Data Mode on Wi-Fi or mobile data can have a similar effect.
- Check your smartwatch. If you wear an Apple Watch or another smartwatch, notifications often go to the watch instead of the phone while you’re wearing it. That’s normal behaviour, not a fault, but it explains why your phone seems quiet.
- Restart the phone. It sounds too simple, but a restart clears stuck background connections more often than you’d expect.
Fixing Notifications on iPhone
If only one app or a few apps are affected on an iPhone, work through these.
- Check the app’s own notification settings. Go to Settings, then Notifications, and tap the app. Make sure Allow Notifications is on, and that Lock Screen, Notification Center and Banners are all ticked. Turn on Sounds if you want to hear them. If the app offers Time Sensitive Notifications, turn that on too. It lets important alerts break through some Focus modes.
- Check notification summaries. On iPhones with Apple Intelligence, summaries can bundle notifications instead of showing them one by one, which can make an important message look like it never arrived. Go to Settings, then Notifications, then Summarize Notifications, and turn it off for apps you need to see in full.
- Check your Focus settings. Go to Settings, then Focus, open each Focus you use, and make sure the people and apps you never want to miss are allowed through.
- Turn on Background App Refresh. Go to Settings, then General, then Background App Refresh, and make sure it’s on for the app. Some apps need it to keep their content up to date.
- Check Lock Screen access. Go to Settings, then Face ID & Passcode, enter your passcode, and under Allow Access When Locked, make sure Notification Center is on. Otherwise notifications may not appear until you unlock.
Fixing Notifications on Android
On Android, the most common cause is battery management. To save power, Android and phone makers put apps to sleep in the background, and a sleeping app can’t receive notifications on time.
- Check the notification permission. Go to Settings, then Notifications, then App settings, and make sure the app is allowed to send notifications. Since Android 13, apps have to ask for this permission, and it’s easy to tap “Don’t allow” without noticing.
- Check notification categories. Many apps split notifications into categories, such as messages, calls, groups and promotions. You may have switched off the one you need. Long-press the app icon, tap the info icon, then Notifications, and check each category.
- Let the app run in the background. Open the app’s info page, then its battery settings. On Pixel and many other phones, turn on Allow background usage and choose Unrestricted for apps where you need instant notifications, such as WhatsApp, your banking app and your email. Keep this to the few apps that matter, since it does use a little more battery.
- Turn off “Pause app activity if unused.” On the same app info page, look for Unused apps and switch off Pause app activity if unused. If you rarely open an app, Android may otherwise remove its permissions and stop it sending notifications, without telling you.
- Allow background data. On the app info page, open Mobile data and Wi-Fi, and make sure background data is allowed.
Phone-Brand Settings That Block Notifications
Many Android phone makers add their own, stricter battery management on top of Android’s. This is the most common reason notifications arrive only when you unlock the phone.
- Samsung: go to Settings, then Battery (or Battery and device care), then Background usage limits. Make sure the app isn’t listed under Sleeping apps or Deep sleeping apps, and add it to Never sleeping apps. On some versions, this is called Never auto sleeping apps.
- Xiaomi, Redmi and Poco: open the app’s info page and turn on Autostart, then set its battery saver option to No restrictions. You can also lock the app in the recent apps screen so it isn’t closed automatically.
- OnePlus, Oppo, Realme, Vivo and iQOO: look in the app’s info page or battery settings for options such as Allow background activity, Allow auto launch or high background power use, and turn them on for the apps that matter.
Menu names change between software versions, so if you can’t find a setting, search for “background” or “battery” in the Settings search bar. The website Don’t Kill My App also keeps brand-by-brand guides for exactly this problem.
Check the App’s Own Settings
Many apps have notification settings inside the app itself, separate from your phone’s.
- WhatsApp: open Settings, then Notifications, and check message and group alerts. Also check whether the specific chat is muted.
- Gmail: open the app’s settings, choose your account, and check that notifications are set to All or High priority only, and that sync is turned on.
- Banking and payment apps: check that alerts are switched on inside the app, and that you’re logged in.
If you use the same app on a computer, notifications are sometimes held back on your phone while you’re active on the desktop version. That’s by design, not a fault.
If Nothing Works
- Update the app and your phone’s software.
- Clear the app’s cache on Android, or delete and reinstall the app on either phone. Back up chats first for messaging apps.
- As a last resort, reset all settings. On iPhone, that’s Settings, then General, then Transfer or Reset iPhone, then Reset, then Reset All Settings. This doesn’t delete your data, but you’ll need to set up Wi-Fi and some preferences again.
Quick Answers
Why are my notifications delayed on Android?
Usually battery optimisation. Android or your phone maker has put the app to sleep in the background. Set the app’s battery usage to Unrestricted, and on Samsung, Xiaomi, OnePlus and similar phones, also allow it to run in the background in the brand’s own battery settings.
Why am I not getting notifications on my iPhone?
Check for an active Focus mode, Low Power Mode and notification summaries first. Then go to Settings, then Notifications, choose the app, and make sure Allow Notifications, Lock Screen and Banners are on.
Why do I only get notifications when I unlock my phone?
On Android, that’s a classic sign of aggressive battery management. Allow the app to run in the background and remove it from any sleeping apps list. On iPhone, check Low Power Mode and Background App Refresh.
Why are WhatsApp notifications not showing?
Check WhatsApp’s own notification settings and whether the chat is muted. Then check the phone’s notification permission and battery settings for WhatsApp, and whether WhatsApp Web or Desktop is open.
Does Do Not Disturb block all notifications?
Mostly, yes. You can allow specific people and apps through in the Do Not Disturb or Focus settings.
Why are notifications going to my watch but not my phone?
When you’re wearing a smartwatch, notifications are usually sent to the watch instead of the phone. That’s normal behaviour.
Bottom Line
Late or missing notifications almost always come down to a setting, not a fault. Find out whether it’s one app or all of them, then check Focus and power-saving modes, the app’s notification permission and, on Android, its battery settings. For the handful of apps you can’t afford to miss, such as messaging, banking and email, give them full background permission. Your battery will barely notice, and you’ll stop finding important messages an hour late.
