When a phone “randomly” vibrates, it’s almost always a notification you didn’t see: an app alert that arrived quietly, a low battery warning, a charger or Bluetooth connection, or an emergency alert test. On Android, open Settings > Notifications > Notification history to see exactly what triggered it. On iPhone, swipe down from the top of the Lock Screen to check Notification Center. Once you know the culprit, turn off vibration for that app or feature.
Here are the common causes, how to track down the one on your phone, and fixes for iPhone and Android.
Common causes of random vibrations
| Cause | Clue |
|---|---|
| App notifications that vanish or arrive silently | A notification appears in history but not on screen |
| Low battery or charging alerts | Vibrates when battery hits 20% or 10%, or when you plug in or unplug |
| Bluetooth or accessory connections | Vibrates when earbuds, a watch, or a car connects or disconnects |
| Emergency and government alerts | Occasional test alerts, often at set times |
| Deleted or recalled messages | A message arrives and is removed before you look |
| Calendar, reminders, or alarms | Happens at the same time daily or weekly |
| Keyboard or system haptics | Vibrates when you touch the screen, even lightly |
| Software bug or hardware issue | Constant or rhythmic vibrations with nothing in notifications |
How to find the cause on Android
- Open Settings > Notifications > Notification history (on Samsung: Settings > Notifications > Advanced settings > Notification history).
- Turn on Use notification history if it’s off.
- Next time the phone vibrates, check the list for the app and time that match.
Fix it on Android
- Turn off vibration for one app: Long-press its notification, tap Settings or the gear, and set it to Silent, or turn off Vibrate for that category.
- Charging vibration: Go to Settings > Sound & vibration and turn off Charging sounds and vibration (names vary by phone maker).
- Touch vibration: In Sound & vibration > Vibration & haptics, turn off Touch feedback or Keyboard vibration.
- Emergency alerts: Settings > Safety & emergency > Wireless emergency alerts. Some alerts can’t be turned off.
- Test in Safe Mode: Press and hold the power button, then touch and hold Power off until Reboot to safe mode appears. If the vibrations stop, a downloaded app is the cause.
How to find the cause on iPhone
- Swipe down from the top-left or center of the screen to open Notification Center and look for recent alerts.
- Check Settings > Notifications for apps set to Immediate or Time Sensitive delivery.
- Think about timing. Vibration when you connect AirPods, a charger, or CarPlay is normal.
Fix it on iPhone
- Turn off vibration for one app: Settings > Notifications > the app > Sounds, then set the sound and Haptics to None, or turn off notifications.
- Turn off vibration in Silent mode: Settings > Sounds & Haptics > Haptics > Don’t Play in Silent Mode (options vary by iOS version).
- Turn off system haptics: Settings > Sounds & Haptics > System Haptics. See how to turn off system haptics on iPhone.
- Turn off all vibration: Settings > Accessibility > Touch > Vibration. This also disables emergency alert vibrations, so use it carefully.
- Use a Focus: Silence notifications at certain times with Settings > Focus.
When it could be a hardware problem
If the phone vibrates constantly or in a steady pattern with nothing in notifications, even in Safe Mode or after a restart, the vibration motor or a stuck button could be at fault. Back up your phone and contact the manufacturer or your carrier. Water damage can cause this too.
Related: switch from Google Dialer to the Xiaomi dialer.
Frequently asked questions
Why does my phone vibrate once and show nothing?
Usually a notification that was dismissed automatically, a message that was deleted, or a connection event like Bluetooth or charging.
Why does my phone vibrate at the same time every day?
Check alarms, calendar events, reminders, and apps with daily notifications like games, fitness, or news.
Can spam calls cause vibrations?
Yes. Silenced calls can still produce a brief vibration. On iPhone, Silence Unknown Callers sends them straight to voicemail.
Kermit Matthews is a freelance writer based in Philadelphia, Pennsylvania with more than a decade of experience writing technology guides. He has a Bachelor’s and Master’s degree in Computer Science and has spent much of his professional career in IT management.
He specializes in writing content about iPhones, Android devices, Microsoft Office, and many other popular applications and devices.