The power button is one of the most frequently used parts of an Android phone, yet many owners use it only to wake the display, lock the device or switch it on. On modern Android phones, that small side button can also open the camera, capture screenshots, launch an AI assistant, activate emergency features and recover a frozen device.
The exact shortcuts depend on the phone’s manufacturer, model and Android version. Google Pixel, Samsung Galaxy, Motorola, OnePlus and other devices may assign slightly different actions to a long press, double press or multi-button combination. Some shortcuts can also be changed through the phone’s settings.
Understanding what the button can do saves time and may prove valuable when the touchscreen is unavailable or an emergency requires immediate action.
1. Double-Press It to Open the Camera Instantly
One of the most useful Android power-button shortcuts is the ability to launch the camera without unlocking the phone or searching for the Camera app.
On many Android devices, quickly pressing the power button twice opens the camera from almost any screen. The shortcut can usually work while the phone is locked, making it particularly useful when a brief moment would otherwise disappear before the camera was ready.
Samsung Galaxy phones normally assign a double press of the Side button to the Camera app by default. Samsung also allows the action to be reassigned. Through Settings, Advanced features and Side button, a user may be able to open another app, activate a particular app function or disable the shortcut completely. Samsung explains these options in its official guide to customising the Galaxy Side button.
On supported devices, the camera shortcut may work even when the screen is off. The phone still protects private photographs and other information behind the lock screen, but it allows the camera to begin taking new pictures immediately.
The shortcut can occasionally activate by accident inside a pocket or tightly fitted case. When that happens repeatedly, the double-press setting can usually be adjusted through Gestures, Advanced features or a similarly named section in the phone’s settings.
2. Combine It With Volume Down to Take a Screenshot
The power button can capture whatever is currently displayed when it is pressed together with the Volume Down button.
Android’s standard screenshot method is to press both buttons at the same time and release them quickly. The phone then saves an image of the screen and normally displays a small preview with options for editing, sharing or deleting it. Google’s official guide to taking screenshots on Android confirms that Power and Volume Down is the standard combination on supported devices.
The shortcut can capture messages, maps, receipts, confirmation pages, settings and other useful information. However, some banking, streaming and privacy-focused apps may block screenshots to protect sensitive or copyrighted content.
On phones running Android 12 or later, a “Capture more” option may also appear when the page contains scrollable content. This allows the user to create a longer screenshot containing more than the visible portion of a webpage, conversation or settings menu.
Timing matters. Holding the buttons for too long may open the power menu or adjust the volume instead. A brief simultaneous press usually produces the most reliable result. Because manufacturers can modify Android’s controls, the exact behaviour may differ slightly on individual models.
3. Hold It to Launch Gemini or Another Assistant
On many newer Android phones, pressing and holding the power button no longer opens the traditional shutdown menu. Instead, it launches Gemini, Google Assistant or the manufacturer’s own voice assistant.
Google’s Pixel documentation states that Gemini can be activated by holding down the power button on supported phones. Once open, the assistant can answer questions, create reminders, draft messages, identify information on the screen and interact with compatible apps. The available functions depend on the device, region, account and permissions granted to Gemini. Google provides further details in its guide to using Gemini on a Pixel phone.
Samsung has also expanded the Galaxy Side button’s long-press behaviour. On recent models and software versions, the button may launch Gemini or Google Assistant, while other devices may still open Bixby. Samsung allows some of these actions to be changed through the Side button settings.
A user who prefers the traditional power menu can often restore it. On compatible Pixel phones, Settings, System, Gestures and “Press and hold the power button” contains an option for choosing between the digital assistant and the power menu. When the assistant remains assigned, pressing Power and Volume Up together can open the shutdown and restart controls on newer Pixels.
The long-press action is therefore less fixed than it once was. It now functions as a configurable shortcut to whichever tool the owner needs most frequently.
4. Press It Repeatedly to Activate Emergency SOS
The power button can also provide rapid access to emergency assistance when there is no time to unlock the phone and navigate through several menus.
On supported Android devices, pressing the power button five or more times can activate Emergency SOS. Depending on the configured settings, the phone may begin a countdown, call emergency services, share the user’s location with emergency contacts or start recording emergency video.
Google’s official instructions for getting help during an emergency with Android explain that the user may need to hold a control on the screen or wait for the countdown before the call begins. Additional emergency actions can start automatically when they have been enabled beforehand.
The feature should be configured before it is needed. Emergency contacts, location sharing and countdown behaviour can usually be reviewed under Settings and Safety and emergency. Menu names vary among Android manufacturers.
Repeated power-button presses should not be tested casually after Emergency SOS has been activated, because the phone may contact emergency services. Accidental calls can also occur when a damaged button or restrictive case registers several presses. Anyone who triggers the feature unintentionally should follow the on-screen instructions and avoid simply disconnecting without explaining the mistake to the emergency operator.
When properly configured, the shortcut can become one of the phone’s most important safety functions.
5. Force-Restart a Phone That Has Frozen
A touchscreen can become completely unresponsive because of a crashed app, temporary software problem or system freeze. When the display no longer accepts taps, the power button may still provide a way to restart the phone.
Google advises owners of frozen Pixel phones to hold the power button for approximately 30 seconds. Its broader Pixel guidance states that a force restart may require holding the button for as long as 60 seconds and releasing it once the Google logo appears. This procedure restarts the operating system without requiring access to the touchscreen. The steps are described in Google’s guide to fixing a frozen Pixel phone.
Samsung Galaxy devices commonly use a different combination. Samsung instructs users to hold the Side button and Volume Down button simultaneously until the device switches off and restarts. The buttons may need to remain pressed for several seconds before the Samsung logo appears. Its official guide to restarting a Galaxy phone explains both ordinary and forced restarts.
A force restart is not the same as a factory reset. It normally does not erase personal files, apps or settings; it simply forces the device to reboot. However, unsaved work in an open app may be lost.
When freezing becomes frequent, restarting is only a temporary response. The phone may also need software updates, storage cleanup, problematic-app removal or professional hardware inspection.
The Correct Shortcut Depends on the Phone
Android is used by many manufacturers, so the power button does not behave identically on every device. A double press may open the camera on one phone and a digital wallet on another. A long press may launch Gemini, Bixby or the power menu. Restart combinations can also vary by model.
The most reliable way to confirm the available controls is to search the phone’s settings for terms such as “power button,” “side button,” “gestures” or “emergency SOS.” Manufacturer support documentation can confirm any model-specific combinations.
Once configured, the power button becomes more than an on-and-off control. It acts as a camera shortcut, screenshot tool, AI assistant trigger, emergency control and recovery mechanism all through a few carefully timed presses.
