Why am I not getting notifications on my phone?
Messages that only appear when you open the app, notifications hours late, or nothing at all. Why the phone is usually doing this on purpose, and the small number of apps worth exempting.
- Difficulty
- beginner
- Time
- 25 min
- Read
- 6 min
Short answer
The commonest cause is battery optimisation: the phone has decided an app is not important, put it to sleep, and stopped it checking for anything until you open it. Fix it per app rather than globally — set battery usage to unrestricted for the handful where timing genuinely matters, such as messaging, email, calendar and anything you rely on for alerts, and leave everything else optimised.
Missing notifications feel like a fault and are usually a policy. Both Android and iOS aggressively suspend background activity to protect battery life, and the rules are opaque, adaptive and per-app: the system watches how often you open something and quietly deprioritises what you ignore. Layered on top of that are focus modes, per-app notification settings, per-conversation muting, and — on Android — manufacturer-specific power managers that are more aggressive than Google's and that override it. Any of those alone will silence an app, and the resulting behaviour, where everything arrives the moment you unlock the phone, is the signature of the whole family.
Step by step
- Establish the pattern before changing anything.All apps or one app? Nothing at all, or everything arriving at once when you unlock? Only when on wifi, or only on mobile data? Only overnight? Each pattern points somewhere different, and "everything arrives on unlock" specifically means the phone was suspending background activity.
- Check the app's own notification switch, then the system one.There are at least two: a setting inside the app, and the phone's per-app notification permission. Both must be on. Apps updated recently sometimes lose the system permission, and on Android 13 and later a newly installed app has notifications off until you allow them.
- Check focus modes and Do Not Disturb.A scheduled focus, a sleep schedule, or a driving mode left on will silence everything without any indication beyond a small icon. Both platforms let a focus allow specific people and apps through, which is a better arrangement than turning it off entirely.
- Exempt the important apps from battery optimisation.On Android, hold the app icon, App info, Battery, and set it to Unrestricted. On Samsung there is an additional Device Care setting for background usage limits that overrides this, and on several other makers there is a separate protected-apps or auto-start list. On iOS, check that Background App Refresh is on for that app.
- Turn off battery saver, at least as a test.Low power mode on iOS and battery saver on Android both reduce background activity, and both switch on automatically at a low charge. If notifications reliably fail in the evening when the battery is low, that is the answer.
- Check the per-conversation settings, not just the app.Messaging apps let individual chats be muted, sometimes for a year, and a mute set once is easy to forget. Group chats are muted more often than people remember doing.
- Check the network the phone is on.Notifications arrive through a persistent connection to Apple's or Google's servers. A restrictive network — a work wifi, a guest network, some public wifi — can block it, so notifications work on mobile data and not on that wifi. Data saver on Android does the same in reverse.
- Deal with duplicated accounts and other devices.An app signed in on a tablet or a computer will sometimes deliver the notification there instead. Messaging apps in particular route alerts to whichever device is active, and that is the explanation when notifications stop after setting up a second device.
Common mistakes
- Turning off battery optimisation for every app — Battery life falls sharply and the benefit is nil, because most apps have nothing time-critical to deliver. The fix is a short list: messaging, email, calendar, alarms, home security, and anything you would be sorry to miss.
- Reinstalling the app as the first move — Reinstalling loses local history in some apps and does not change the battery policy, the focus mode or the network — which are the actual causes. It is a reasonable step much later, not first.
- Assuming the sender is at fault — Missed messages create real friction between people. Before deciding a message was never sent, check whether it appears when you open the app — if it does, the phone had it all along and simply did not tell you.
If it doesn't work
Everything arrives at once when you unlock the phone
Cause: Background activity was suspended — Fix: Battery optimisation. Exempt the specific apps that matter, and check any manufacturer power manager as well as the Android setting.
One app only, and it was fine until recently
Cause: The app lost its permission, or the phone deprioritised it — Fix: Check the app's notification permission, then set battery usage to unrestricted. An app you rarely open is exactly what adaptive battery targets.
No sound but the banner appears
Cause: A notification channel or alert style setting — Fix: Android splits notifications into channels with independent sound settings, so one type of alert from an app can be silent while others are not. Look inside the app's notification settings rather than at the top-level switch.
Works on mobile data, not on wifi
Cause: The network is blocking the push connection — Fix: Common on work, school and some public networks. There is usually nothing to change on the phone; a VPN sometimes works around it, and mobile data always does.
Stopped after setting up a smartwatch or tablet
Cause: Notifications are being routed to the other device — Fix: Most watch apps mute the phone while the watch is worn and connected, which is intended. Check that behaviour before assuming the phone is broken.
Nothing from any app, at all
Cause: A focus mode, or the push connection is down — Fix: Check Do Not Disturb and focus schedules first. If those are clear, restart the phone — the persistent push connection can fail and a restart re-establishes it.
Questions people ask
Why does Android seem worse at this than iPhone?
Because manufacturers add their own power management on top of Android's, and several are considerably more aggressive than Google's — with separate settings that override the standard one. It is a known and long-running problem, and it is why Android advice always has a step about checking the manufacturer's own battery settings.
Does turning off battery optimisation drain the battery badly?
For a handful of apps, barely noticeably. For all of them, yes — background activity is one of the largest drains there is. The point of exempting selectively is to buy reliability where it matters and keep the saving everywhere else.
Why do I get the notification on my watch but not my phone?
That is deliberate. Most smartwatch pairings suppress phone alerts while the watch is on your wrist and connected, so you are not notified twice. If you want both, there is usually a setting for it in the watch's companion app.
My alarms still work but nothing else does
Alarms are handled by the system rather than by background app activity, so they survive every power-saving measure and every focus mode. Working alarms alongside missing notifications is a strong confirmation that background activity is what has been suspended.