How to Restart Samsung Galaxy Watch 4

Restarting your Galaxy Watch 4 clears temporary software glitches, fixes unresponsive touch input, and resolves Wear OS connectivity issues — without erasing any of your data. Whether your watch is sluggish, frozen, or simply needs a fresh start, there are four distinct ways to do it. This guide covers every method, plus what to do when a normal restart won’t work.

This guide applies to: Samsung Galaxy Watch 4 (40mm and 44mm) and Galaxy Watch 4 Classic (42mm and 46mm).

Restart Methods at a Glance

Method	When to Use	Data Loss?	Works If Screen Frozen?
Hold Power button → Restart	Watch is slow or acting up	No	No
Swipe-down Quick Panel	Quickest method when watch is responsive	No	No
Settings app	Useful when side button is sticky	No	No
Force Restart (Home + Back, 7 sec)	Watch is completely frozen / unresponsive	No	Yes
Factory Reset	All else fails, persistent software issue	Yes	Partial

Method 1: Restart Using the Power Button (Most Common)

This is the standard restart method for everyday use — when your watch is running slow, an app has crashed, or it’s behaving unexpectedly.

1. Press and hold the Home button (the larger button on the right side of the watch) for about 2–3 seconds.
2. The power menu will appear on-screen, showing three options: Power off, Restart, and Emergency mode.
3. Tap Restart.
4. The screen will go dark, the Samsung logo will appear, and the watch will reboot. This takes about 30–45 seconds.

Note: On the Galaxy Watch 4 Classic, the Home button is the bottom button on the right side. The top button is the Back button.

Method 2: Restart from the Quick Panel (Fastest Method)

The Quick Panel gives you power options without holding any buttons. This is the fastest method when the watch is responsive.

1. From the main watch face, swipe down from the top of the screen to open the Quick Panel.
2. Swipe left until you see the Power icon (it may not be on the first page of Quick Panel shortcuts).
3. Tap the Power icon.
4. Tap Restart from the menu that appears.

Tip: The Galaxy Watch 4 runs Wear OS, so the Quick Panel layout is slightly different from older Tizen-based Samsung watches. If you don’t see a power icon in the Quick Panel, use Method 1 instead.

Method 3: Restart via the Settings App

If the physical Home button is stiff or sticky, you can restart the watch entirely through software.

1. Press the Home button once to go to the app list (or swipe up from the watch face).
2. Tap the Settings app (gear icon).
3. Scroll down and tap General.
4. Scroll to the bottom and tap Shut down.
5. To restart (rather than power off), press and hold the Home button for 1–2 seconds after the watch powers down, then release when the Samsung logo appears.

Method 4: Force Restart (When the Watch Is Completely Frozen)

If the screen is locked up, touch input isn’t working, or the watch is stuck on a loading screen, a force restart bypasses software entirely.

1. Press and hold the Home button (right-side, bottom) AND the Back button (right-side, top) simultaneously.
2. Hold both buttons for 7–10 seconds.
3. Keep holding even when the screen goes black.
4. Release when you feel a vibration or see the Samsung logo appear.
5. The watch will reboot normally.

This method does not erase your data. It’s equivalent to removing and reinserting the battery on older devices.

If the force restart doesn’t work on the first attempt: Try again, this time holding for a full 10 seconds. Some units with older firmware require the longer hold.

Why Your Galaxy Watch 4 May Need to Be Restarted Frequently

If you’re restarting your watch more than once a week, there’s usually an underlying cause. Here are the most common culprits as of 2026:

• A misbehaving third-party app — Wear OS apps from the Google Play Store can conflict with Samsung’s One UI Watch layer. Check which apps were installed before the issue started.
• Outdated Wear OS or One UI Watch firmware — Go to Settings → System → Software updates on the watch to check. Also update the Galaxy Wearable app on your phone.
• Low storage — On the Watch 4, internal storage is 16GB, but heavy app use can fill it. Go to Settings → General → Storage to check available space.
• Bluetooth sync loop — If your watch constantly connects and disconnects from your phone, it can cause repeated crashes. Toggle Bluetooth off and back on from your phone.
• Battery health degradation — Older Galaxy Watch 4 units (released in 2021) may have batteries that no longer hold adequate charge, causing unexpected shutdowns that look like freezes.

Troubleshooting: When the Watch Won’t Restart

Watch Is Stuck in a Boot Loop

A boot loop means the watch keeps showing the Samsung logo and restarting on its own, never making it to the watch face. This is most commonly caused by a recently installed app or a corrupted firmware update.

Fix 1 — Force restart first

Try the force restart method (hold Home + Back for 7–10 seconds). If the watch successfully boots to the watch face, immediately go to Settings → Apps and uninstall any apps installed shortly before the issue started.

Fix 2 — Clear the Galaxy Wearable app cache on your phone

1. On your phone, go to Settings → Apps → Galaxy Wearable.
2. Tap Storage → Clear cache.
3. Force restart the watch again.

Fix 3 — Factory reset via Recovery Mode (watch stuck before watch face)

If the watch can’t get past the Samsung logo:

1. Press and hold Home + Back simultaneously until you feel a vibration and see “Rebooting…” — do NOT release when “Restart” appears on screen.
2. Continue holding until the Recovery Mode menu appears.
3. Use the Back button to scroll down to Wipe data / factory reset.
4. Press the Home button to confirm.
5. Scroll to Factory data reset and press Home again.

⚠️ Warning: Factory reset permanently deletes all data on the watch including health records, downloaded apps, and customized settings. Health data synced to Samsung Health on your phone is preserved.

Watch Has a Black Screen and Won’t Turn On

Before assuming the watch is dead, try these steps in order:

1. Check the battery — Place the watch on its charger for at least 30 minutes. If the battery is completely drained, it may take a few minutes before the charging indicator appears.
2. Try the force restart while charging — With the watch on the charger, hold Home + Back for 10 seconds.
3. Inspect the charger pins — Dirt or corrosion on the charging contacts (on the back of the watch) can prevent charging. Wipe with a dry cotton swab.
4. Try a different charger — Use the original Samsung wireless charger. Third-party chargers may not deliver the required 5V/150mA+ output reliably.

Recommended chargers (spot-check links before publishing):

• Samsung Official Galaxy Watch Fast Wireless Charger (EP-OR900BBEGWW) — Official Samsung charger, USB-C
• SENIOROY Magnetic Charging Dock for Galaxy Watch 4/5/6 — Budget-friendly third-party option
• 2-Pack Galaxy Watch 4/5/6 Charging Cable — Good value backup charger set

Watch Keeps Restarting on Its Own (Random Reboots)

Random reboots that happen during workouts, while sleeping, or during normal use usually point to one of three issues:

1. Software bug: Check for pending firmware updates via Settings → System → Software update on the watch.
2. App conflict: Uninstall recent apps one by one to isolate the cause — boot-time safe mode isn’t available on Wear OS the same way it is on Android phones.
3. Battery failure: If the watch is 3+ years old and random reboots coincide with the battery indicator showing 20–30%, the battery cell may need replacement. This is covered under Samsung Care+ out-of-warranty repair.

When to Contact Samsung Support

If none of the above solutions resolve the issue, the problem is likely hardware-related — usually a failing battery, damaged charging port, or display defect. Here’s what to do:

• Under warranty (within 1 year of purchase): Contact Samsung at 1-800-SAMSUNG (1-800-726-7864) or visit samsung.com/us/support to start a warranty claim.
• With Samsung Care+: Coverage includes unlimited accidental damage repairs. Use the Galaxy Wearable app → About watch → Samsung Care+ to check your plan.
• Out of warranty: uBreakiFix locations (Asurion-authorized Samsung repair) handle Galaxy Watch 4 screen, battery, and charging port repairs. Find your nearest location at ubreakifix.com.

What Restarting Does (and Doesn’t Do)

A restart on the Galaxy Watch 4 clears the RAM, ends all running processes, and reloads the Wear OS firmware from scratch. It does not delete your health and fitness data (steps, sleep, heart rate history), installed apps, watch faces and complications, paired phone connection, or notification and alarm settings.

The only thing that clears your data is a factory reset — which requires deliberate confirmation on the watch.

As of 2026, the Galaxy Watch 4 is still receiving security patches from Samsung, but it is no longer in the active OS update cycle. It shipped with Wear OS 3.5 / One UI Watch 4.5 and will not receive Wear OS 4 or later.