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Xiaomi

Guides for Xiaomi Black Shark 3S

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Set a Custom Watermark in the Camera App

If every photo automatically shows your device or camera model as a watermark, you might want your own text there instead. The Watermark settings inside the Camera app let you swap that default label for a personal signature, but the option sits a few taps deep in the menu. Once set, the custom text gets stamped on every new shot instead of the model name.

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System & Settings2

Turn On/Off Gesture Confirmation

Swiping back or closing an app by accident during a full-screen game or a video can throw you straight out of the action. On Xiaomi phones with full-screen gesture control, this usually happens because gesture confirmation is turned off, so a single swipe is enough to trigger the action. Turning it on forces you to swipe twice before the gesture actually executes.

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Security & Privacy2

Remove a Stored Fingerprint

If a fingerprint still unlocks your Xiaomi phone after you sold it, handed it to someone else, or just registered a bad scan, that print needs to go. MIUI stores several fingerprints under one name, so it is easy to remove the wrong one by mistake. Deleting a print always asks for your unlock pattern, PIN or password first, which trips up people who only remember using their finger.

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Apps & Installation2

Set an App Timer to Limit App Usage

Some apps quietly eat hours of your day without you noticing, especially social media or games that keep notifications pulling you back in. On Xiaomi phones there is no built-in reminder that tells you when an app has crossed a healthy usage limit. Digital Wellbeing lets you assign a daily time budget per app so it pauses itself once that budget runs out.

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Security & Privacy2

Show or Hide Password Characters While Typing

On Xiaomi phones, every character you type into a password field flashes briefly on screen before turning into a dot. If you unlock accounts in public, on a video call, or while someone else can see your display, that brief character preview can expose your password to anyone nearby.

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Apps & Installation

Change App Icon Size

If the home screen on your Xiaomi phone feels cluttered or the icons look too small to tap comfortably, MIUI lets you adjust that directly from the home screen settings. The icon size is controlled by a slider, so you can fine-tune it instead of picking from a few fixed presets. Getting this wrong can shift your grid layout or cut off app names underneath the icons.

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Display & Home Screen2

Turn On/Off Auto Brightness

If your Xiaomi screen keeps getting brighter or dimmer without you touching anything, Auto Brightness is reacting to the light sensor. You can still drag the brightness slider manually while the function stays active, which often causes confusion about which setting is actually in control.

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System & Settings2

Turn Off Developer Options

If Developer options keeps popping up in your Xiaomi settings even though you only enabled it once for a quick fix, it usually just needs to be switched off inside its own menu. Leaving it active keeps USB debugging and other low-level toggles exposed, which can interfere with app checks or banking apps. Turning it off hides the whole menu again until you reactivate it through the hidden tap sequence.

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Other

Set Up Text-to-Speech Output

When TalkBack or Select to Speak reads content in the wrong language or sounds too fast, the text-to-speech engine on your Xiaomi phone is set to the wrong voice or rate. Pitch, speed and language all come from one shared accessibility setting, so a single wrong value affects every screen-reading feature at once. Fixing it stops garbled or mismatched speech without disabling accessibility features entirely.

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Display & Home Screen

Shake to Auto-Arrange Home Screen Icons

Empty cells scattered across your Xiaomi home screen after uninstalling an app? Shaking the phone while in edit mode can pull the remaining icons together and close those gaps automatically. The feature, called Shake to fill empty cells, sits hidden in the display settings and can be switched on or off.

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Apps & Installation2

Split Screen on Xiaomi Phones

Split screen lets you run two apps side by side on your Xiaomi phone, so you can chat while browsing or take notes while watching a video. MIUI offers more than one way to trigger it, and not every app supports it the same way. Knowing how it behaves helps you decide when it actually saves time.

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System & Settings2

Turn Automatic Date & Time On or Off

If your Xiaomi phone shows the wrong time after a trip or SIM swap, the automatic time sync is likely still active. Automatic date & time relies on network-provided time, which can lag or fail when signal is weak. Turning it off lets you set the clock manually instead.

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Calls & Messages2

Missed Call Reminders: Turn On or Off

If a missed call slips by unnoticed until hours later, missed call reminders are probably switched off or set to repeat only once. MIUI can nudge you again about an unanswered call, and the number of repeats is adjustable. Without this setting active, a single missed call notification is easy to swipe away and forget.

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Security & Privacy2

Lock Home Screen Layout

If icons keep shifting position every time you delete an app or accidentally shake your phone, MIUI is still rearranging empty spaces on its own. Locking the layout stops that automatic reshuffling and keeps every icon exactly where you placed it.

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Accounts & Cloud2

Turn Auto-Sync Data On or Off

If your Xiaomi phone burns through mobile data or drains battery faster than expected, background account synchronization is often the reason. This setting keeps your Google Account data, like contacts, calendar entries and photos, updated in the background at all times. Switching it off stops the drain immediately but also means new changes stop arriving until you sync manually.

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Notifications & Focus2

Turn Tap Sounds On or Off

Every tap on a button, the Back key, or a menu item triggers a short click sound on your Xiaomi phone. If that noise gets distracting during calls, meetings, or at night, the Tap sounds setting is behind it and can be switched off just as quickly as it can be turned back on.

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Apps & Installation2

Restrict Mobile Data Usage for an App

If a Xiaomi phone burns through your data plan even though you barely open certain apps, background data access is usually the cause. By default every installed app can use mobile data and Wi-Fi without restriction. On dual-SIM phones this applies separately to each SIM slot, which makes it harder to spot which line is actually consuming the data.

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System & Settings

Edit and Rearrange Quick Settings

If the toggle you need most sits at the bottom of the control center or is missing entirely, you have to scroll or swipe further every time you want to switch it on. MIUI lets you add, remove and reorder these quick settings tiles, but the edit option is easy to miss if you have never opened it before.

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Network & Connectivity2

Turn Contact Sharing via Bluetooth On or Off

When you pair your Xiaomi phone with a car radio, the contact list sometimes stays empty even though the Bluetooth connection shows as active. That happens because MIUI keeps Contact sharing separate from the general Bluetooth toggle, so voice dialing and steering-wheel controls have no phonebook to pull from until you enable it. The same setting can also keep sharing your address book with a paired device after you no longer want it to.

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Notifications & Focus

Allow or Deny Do Not Disturb Access for Apps

When an app suddenly enables Do Not Disturb on its own, or a call app keeps muting notifications you actually want to see, a hidden system permission is usually behind it. On Xiaomi phones, individual apps can request permission to switch Do Not Disturb on or off, and that access is not always obvious from the app itself. Checking which apps hold this permission helps you regain control over your notifications.

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Other2

Set Touch & Hold Delay

If long-pressing an app icon on your Xiaomi home screen either opens the shortcut menu too fast by accident or takes too long to react, the touch and hold delay is set to the wrong stage. This timing controls how long you need to keep your finger down before a long-press action triggers, and it affects every control element that supports it, not just app shortcuts.

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Notifications & Focus

Search Bar in Notification Shade

Pulling down the notification shade on a Xiaomi phone sometimes shows an extra search field at the top that you never asked for, or the opposite happens and you want that shortcut back. This toggle sits in Mi Browser, not in the notification settings where most people go looking for it. Without knowing that, the option seems to be missing entirely.

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Notifications & Focus2

Delete an Alarm

If your Xiaomi phone keeps ringing at a time you no longer need, an old alarm is probably still sitting in the Clock app. Alarms pile up quickly once you set them for one-off events like flights or workouts, and they rarely get removed afterward. A cluttered alarm list also makes it harder to spot the one alarm you actually rely on every morning.

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Other

Turn On/Off Sunlight Mode

Bright sunlight can make the Xiaomi display look washed out or hard to read, especially when checking messages outdoors. If automatic brightness is switched off, a separate Sunlight mode boosts the screen output whenever strong light hits the sensor. Without it active, the display often stays too dim outside even at maximum manual brightness.

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