Missing notifications on an iPhone usually aren’t one big problem. They are one of several small ones that look identical from the outside: a text arrives silently, a badge never updates, or an alert you needed never appears. The fix depends on where the chain broke, so work through these checks in order.
This guide is part of Common iPhone Problems and How to Fix Them.
Quick Answer
Start in Settings > Notifications, tap the app, and make sure Allow Notifications is on with Lock Screen, Notification Center and Banners selected. Then turn off any Focus (Do Not Disturb, Sleep or Work) in Control Center. If texts from numbers not in your contacts are missing, iOS may be screening them: check Settings > Apps > Messages > Unknown Senders. Also check Scheduled Summary and, if you wear an Apple Watch, whether alerts are going to the watch. Then restart and update to the latest iOS 27.
Check the App’s Notification Settings
The most common cause is simple: the app doesn’t have permission. It happens all the time with new apps, when you tap “Don’t Allow” on the prompt without thinking about it.
Go to Settings > Notifications and tap the app. Check that:
- Allow Notifications is on.
- Under Alerts, Lock Screen, Notification Center and Banners are selected. If Lock Screen is off, you’ll miss alerts that arrive while the phone is asleep. If Banners is off, nothing pops up while you’re using the phone.
- Banner Style is set the way you want. Temporary banners disappear on their own. Persistent banners stay until you dismiss them, which is useful for messages and reminders.
- Sounds and Badges are on if you want them. They are separate toggles, and easy to miss.
Turn Off Focus and Do Not Disturb
Focus modes cause more “missing notification” complaints than anything else, because they are easy to turn on and easy to forget. A Focus can also be scheduled, so your phone may be silencing alerts for hours every day without you noticing. If you also use Focus to switch Home Screen pages, see how to organize your Home Screen by Focus.
- Check Control Center. Swipe down from the top-right corner. If a Focus icon is lit (a moon, a bed, a person or a custom icon), tap it to turn it off.
- Check schedules. Go to Settings > Focus, tap each Focus, and look at its schedule. A Work Focus from 9 to 5 or a Sleep Focus at 10 p.m. will quietly hold notifications during those hours.
- Check who and what gets through. In each Focus, Allow Notifications From lists the people and apps that can break through, and Silence Notifications From lists the ones that can’t. If you always want calls and messages from certain people, add them to the allowed list in every Focus you use.
- Check your other devices. With Share Across Devices on, a Focus you turn on on your Mac, iPad or Apple Watch also applies to your iPhone.
Check Screen Unknown Senders in Messages
Since iOS 26, Messages can screen texts from numbers that aren’t in your contacts. The setting is off by default, but when Screen Unknown Senders is on, those texts go to a separate Unknown Senders list and most of them don’t trigger notifications. That’s why a delivery update or a text from a new coworker can seem to vanish. Time Sensitive messages, such as verification codes, still notify by default.
To change it:
- Go to Settings > Apps > Messages and scroll to Unknown Senders.
- Turn Screen Unknown Senders off, or keep it on and tap Allow Notifications to choose which kinds of screened messages can still alert you: Time Sensitive, Personal, Transactions or Promotions.
You can also get there from the Messages app: tap the Filters button, then Manage Filtering. To find a text you missed, open the Unknown Senders list in Messages.
Check Scheduled Summary and Apple Intelligence Features
Scheduled Summary holds non-urgent notifications and delivers them in batches at times you choose. If an app is in your summary, its alerts won’t show up when they arrive. Go to Settings > Notifications > Scheduled Summary to see which apps are included or to turn it off.
On iPhones that support Apple Intelligence (iPhone 15 Pro and newer), notifications can also be summarized and prioritized, and the Reduce Interruptions Focus only lets through notifications it judges important. If you turned on Reduce Interruptions, it can hold back alerts you actually wanted. Turn it off in Control Center or in Settings > Focus, and review the Apple Intelligence notification options in Settings > Notifications.
Are Your Alerts Going to Your Apple Watch?
If you wear an Apple Watch, notifications are designed to go to the watch when your iPhone is locked and the watch is on your wrist and unlocked. When your iPhone is unlocked and you’re using it, alerts show on the iPhone instead. So an iPhone that seems quiet may simply be sending everything to your wrist. That’s normal behavior, not a bug.
Check the App’s Own Notification Settings
Many apps have notification controls of their own that sit on top of iOS settings. Slack, Gmail, Instagram and most messaging and social apps let you turn notifications off inside the app, per account, per workspace or per channel. iOS can be fully set up and you’ll still get nothing if the app itself has alerts off.
Open the app, go to its settings, and look for Notifications. For Apple’s Mail app, each account has its own setting under Settings > Apps > Mail > Notifications > Customize Notifications.
Badges Not Updating? Check Background App Refresh and Low Power Mode
If an app’s red badge isn’t updating, first make sure Badges is on for that app in Settings > Notifications. Then check Settings > General > Background App Refresh. Apps like email, messaging and news need it to check for new content in the background.
Low Power Mode also temporarily reduces background activity, including background app refresh and email fetch, to save battery. If notifications got sluggish right when your battery dropped, that’s likely why. If you rely on Low Power Mode every day, read up on iPhone battery lifespan and replacement costs. Turn it off in Control Center or Settings > Battery.
Restart, Update and Reinstall the App
If everything above checks out and notifications are still missing, a restart fixes it more often than you’d expect. Press and hold the side button and either volume button until the slider appears, then power off and back on.
Next, go to Settings > General > Software Update and install the latest version of iOS 27, which runs on the iPhone 11 and newer. If one app is still silent, delete it and reinstall it. That resets its permissions and prompts you for notification access again.
Last Resort: Reset All Settings
If notifications misbehave across many apps, go to Settings > General > Transfer or Reset iPhone > Reset > Reset All Settings. Your apps and data stay, but settings return to their defaults, including Wi-Fi networks and notification preferences, so you’ll need to set those up again. A full erase and restore is rarely necessary for notification problems.
When It’s Time for a Newer iPhone
If your iPhone is old enough that it no longer gets current iOS updates, apps can start misbehaving, notifications included. Losing updates is one of the signs you should upgrade your phone. How Long Will a Used Phone Get Updates? explains the support timelines. A newer used iPhone is often the cheapest fix: the Used iPhone Buyer’s Guide: Every Generation Ranked (2026) shows which models are worth it, and you can sell your current iPhone on Swappa to cover part of the cost.
For other iPhone connection problems, see iPhone Won’t Stay Connected?, and if your iPhone’s look and settings changed after an update, see iOS Looks Different and You Hate It.
Frequently Asked Questions
Why are my iPhone notifications not showing up?
The usual causes are notifications turned off for the app in Settings > Notifications, a Focus such as Do Not Disturb or Sleep that is on or scheduled, Scheduled Summary holding alerts until later, or notifications turned off inside the app itself. Check those first, then restart and update iOS.
Why am I not getting text notifications from some people?
If the texts come from numbers that aren’t in your contacts, Screen Unknown Senders may be filtering them into a separate Unknown Senders list without a notification. Turn it off, or allow notifications for certain categories, in Settings > Apps > Messages > Unknown Senders. For people in your contacts, check whether a Focus is silencing them.
Why do notifications show on my Apple Watch but not my iPhone?
That’s by design. When your iPhone is locked and your Apple Watch is on your wrist and unlocked, notifications go to the watch. When you’re using your iPhone, they appear on the iPhone instead.
How do I turn off Focus mode on my iPhone?
Swipe down from the top-right corner to open Control Center and tap the lit Focus icon to turn it off. To stop it from turning back on, go to Settings > Focus, tap the Focus, and remove or change its schedule.
Why are my iPhone badges not updating?
Make sure Badges is turned on for the app in Settings > Notifications, and that Background App Refresh is on for it in Settings > General > Background App Refresh. Low Power Mode also reduces background refresh, so badges can lag while it’s on.
Work Through the Chain, One Link at a Time
Missing notifications almost always trace back to one setting: the app’s permission, a Focus, Screen Unknown Senders, Scheduled Summary or your Apple Watch. Check them in order and you’ll usually find the culprit in a few minutes.
If your iPhone is old enough that software problems keep piling up, a verified used upgrade costs far less than a new phone. Swappa staff review listings before they go live under its No Junk, No Jerks standards, and payments run through PayPal with buyer protection.
