How to test edge gestures on a foldable device

A swipe from the edge of a foldable screen may go back, open a panel, or do nothing. It can be hard to tell whether the screen missed your finger or the phone handled the gesture differently.

Test the cover screen and the inner screen separately with the Touch Screen Test. It shows whether touch points register, but a browser test cannot confirm that Android's edge gesture settings or a specific app are working as intended.

Test the edges on both screens

Open the Touch Screen Test on your foldable. Start with the cover screen, and keep the phone in the same orientation while you test.
Tap near each edge, then drag a finger slowly from the edge toward the center. Try the left and right edges, and check the top and bottom if you use gestures there.
Repeat each swipe several times, starting at different points along the edge. Watch whether the touch point appears and follows your finger without gaps.
Open the device and repeat the test on the inner screen. Pay attention to the areas near the hinge and the outer edges, and compare them with the middle of the display.
If you normally use two-finger gestures, place two fingers down at once and move them apart or together. This checks whether multiple points register, not whether every app supports the gesture.
Repeat a missed swipe in the app where the problem happens. Note whether the failure occurs in the test, in one app, or only when you start a system navigation gesture.

Use a light, steady touch. Don't press hard on the fold or try to lift a screen protector. A case or protector can affect where your finger lands, so test with the case removed only if you can do that safely and without removing a factory-installed protector.

What the result means

Touch points follow your finger along the edge

The screen is registering those touches in the browser. If the same motion fails in another app, the issue is more likely to involve that app, its swipe controls, or Android's gesture handling than a completely unresponsive strip of screen. Try the same action in another app before changing settings.

A touch point disappears in the same strip each time

If you can reproduce a gap in the same place, while nearby touches register, that may indicate a touch-sensitive area or a screen problem. Repeat the check on the other display and after removing a removable case. A browser test is a useful clue, not a hardware diagnosis.

The cover screen works, but the inner screen does not, or vice versa

The two displays can behave differently because they have separate touch layers, screen settings, and layouts. A fault limited to one display is more concerning than a gesture that fails in just one app. Check whether the missed area is consistent and whether ordinary taps fail there too.

The browser registers the swipe, but the system action does not happen

The browser is detecting your finger, but that does not prove Android recognized the motion as a back or other system gesture. The gesture may need to start closer to the edge, the navigation mode may differ, or an app may be handling the swipe instead.

The swipe works in the test but fails in one app

The touch screen is probably responding. The app may use edge swipes for its own controls, or it may block a gesture near the edge. Check the app's settings and try the same motion in another app before treating it as a device fault.

How to fix missed edge gestures

Check your starting position. Start the swipe right at the display edge, then try slightly farther in. Some gesture controls use a narrow starting area, while a thick case lip can make it hard to reach.
Check the navigation mode. On many Android phones, gesture navigation is under Settings › System › Gestures › System navigation. On Samsung phones, look under Settings › Display › Navigation bar. Menu names vary by manufacturer and Android version. If you use three-button navigation, edge swipes may not perform the same system actions.
Check app-specific gestures. Look in the app's settings for swipe, full-screen, or edge controls. Test the gesture in a second app to see whether the problem is limited to one app.
Remove anything obstructing the edge. Take off a removable case and clean the screen with a soft, dry cloth. Do not peel off a factory-installed foldable screen protector. If a protector is lifting, damaged, or bubbling near the fold, ask the manufacturer or an authorized repair provider what to do.
Restart the phone and update the app. A restart can clear a temporary touch or gesture problem. Install available system and app updates, then test again before changing more settings.
Check touch sensitivity if your phone offers it. Some Android models have a touch-sensitivity option in display settings, particularly for use with a screen protector. Change it only if the setting exists on your model, and compare the result with the original setting.

When the screen may need repair

Hardware is more likely if the same narrow area repeatedly misses taps and swipes across several apps, or if it fails in the Touch Screen Test on that display. A visible crack, discoloration, flickering, or a recent impact makes a screen problem more plausible. Stop pressing on the affected area, especially near the hinge.

Back up important data if the screen still works, then contact the manufacturer or a qualified repair shop. Foldable displays and their touch layers are specialized parts, so don't try to lift the screen or replace a protector as a way to diagnose the problem. If the device is under warranty, ask the manufacturer about inspection before arranging an independent repair.

Why a browser test cannot confirm every gesture

A touch point and a system gesture are different things. The browser can show that a finger touched a place on the display, but Android may intercept a swipe from the edge to perform navigation before the web page receives the full motion. A browser or app can also use a horizontal swipe for its own controls.

That is why testing both displays and comparing the browser with the app that has the problem matters. If the test detects touches but the gesture behaves differently between apps, focus on navigation settings and app behavior. If the same physical strip misses ordinary touches repeatedly, get the display checked.