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Samsung

Guides for Samsung Galaxy F12

532 guides

Network & Connectivity2

Turn Mobile Data On or Off

When mobile internet stops working outside WiFi range, or you want to cut data usage while traveling, the culprit is often the Mobile data toggle itself rather than a network issue. On dual SIM Samsung phones, only the SIM set as your default data line reacts to this switch, which confuses a lot of users. Data usage limits and background restrictions can also silently affect how this toggle behaves.

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Notifications & Focus2

Assign a Custom Ringtone to a Contact

If every caller sounds the same on your Samsung phone, you end up checking the screen for every ring. Samsung lets you attach a separate ringtone and vibration pattern to a single contact, so you know who is calling before you look. This works with both built-in tones and audio files you already have on the device.

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Display & Home Screen2

Set Up Secure Folder

Storing sensitive apps, photos, or documents in the regular gallery or app drawer means anyone who picks up your phone can open them. Secure Folder creates an encrypted, password-locked space that keeps selected apps and files separate from the rest of your device. Many Samsung owners never turn it on because the option sits buried inside the security settings and stays invisible until activated.

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Other2

Find Nearby Places in the Phone App

Looking for a restaurant, pharmacy, or grocery store close by without switching to a separate maps app? The Phone app on Samsung devices has a Places tab that searches nearby locations by category or keyword, but it sits quietly next to Contacts and Recents and gets overlooked. Results come with ratings and directions once you know where to tap.

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Network & Connectivity

Show or Hide Wi-Fi Network Quality Info

If your Wi-Fi list only shows network names, you cannot tell before connecting whether a network will actually be fast or barely usable. Samsung phones can add a quality label like Very fast, Fast, Normal, or Slow right next to each network in the list. This option lives inside the Wi-Fi advanced settings and most people never turn it on.

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Other2

Share a Website from the Browser

Want to send a website to a friend, colleague or family member without retyping the link? On Samsung phones, the browser's share function lets you forward any page directly through email, WhatsApp, SMS or social media. If you can't find the option, it's usually hidden inside the browser menu rather than the address bar.

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Network & Connectivity2

Set Default SIM Card for Mobile Data

If mobile data feels slow after inserting a second SIM, your Samsung phone is likely still pulling data through SIM card 1 by default. On some models only that first slot supports fast LTE, so calls or texts on SIM 2 work fine while data stays sluggish. Switching the active data SIM fixes this without removing either card.

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Network & Connectivity

Lock Network and Security Setting

If your Samsung phone drops its Wi-Fi or mobile data connection every time the screen locks, Find My Mobile can lose track of the device the moment it goes missing. The Lock network and security option controls exactly this behavior and keeps the connection alive while the screen is off. Without it enabled, locating or remotely controlling a lost phone becomes much harder.

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Accessibility2

Turn Off TalkBack (Voice Assistant)

If TalkBack is reading every icon aloud instead of opening it, a single tap on your Samsung phone no longer does what you expect. The screen reader changes tap behavior across the whole device, so finding and hitting the right switch to turn it off feels almost impossible with normal gestures. This guide shows the exact tap pattern you need to reach the TalkBack switch and shut it down again.

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Calls & Messages2

Manage Calendar Colors

When several accounts sync into the Samsung Calendar app, every entry can end up in the same shade, making it hard to tell a work meeting from a personal appointment or a public holiday at a glance. This happens because each account keeps its default color until you assign a new one manually. The mix-up gets worse the more calendars you connect to your phone.

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Photo, Video & Media2

Rearrange Camera Modes

Panorama sits at the front while Video is buried three swipes away, and every shot turns into extra scrolling. Samsung phones list Photo and Video as fixed defaults, but modes like Live Focus, Pro or Panorama can be shuffled into any order you actually use. The stock layout rarely matches how most people shoot day to day.

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Network & Connectivity2

Turn Wi-Fi Calling On or Off

If calls keep dropping in areas with weak mobile signal but strong Wi-Fi, your Samsung phone probably has Wi-Fi Calling turned off. This feature lets the device route voice calls over a wireless network instead of the regular cellular connection. Whether it needs to be on or off depends on your carrier and where you spend most of your time on a call.

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Display & Home Screen2

Show or Hide Secure Folder Icon on Home Screen

If the Secure Folder icon vanished from your Home screen or Apps screen, you probably switched off a display toggle rather than deleted anything. While the icon is hidden, you cannot tap it open, and the only way back is through the folder's own settings. You will need your Secure Folder password, PIN, or pattern to get there.

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Network & Connectivity2

Delete an APN on Samsung

If you removed the wrong Access Point Name on your Samsung phone, mobile data, SMS, and MMS can stop working right away. The delete option sits in the same menu where APNs get created, so it is easy to tap the wrong entry by mistake. Only remove profiles that are not currently active for your carrier.

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Storage & Backup

Restore a Local Backup

If your Samsung phone still shows old photos, contacts or settings after a factory reset, the backup saved to your memory card, USB stick or external drive was never applied. Local backups live outside your Samsung account, so the system will not pull them in automatically. You need to trigger the restore manually through the storage transfer settings, and this works on any Samsung device, not only the one that created the backup.

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Display & Home Screen2

Change Home Screen Grid Size

If icons on your Samsung home screen look too large or too small, or too few apps fit per row, the Home screen grid setting is likely still on its default layout. Switching between 4x5, 4x6, 5x5, and 5x6 changes how many app shortcuts appear per screen and how big each icon renders. This also affects spacing on the app screen, not just the home screen.

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System & Settings2

Clear Browsing History in Samsung Internet

If Samsung Internet keeps suggesting old searches or autofilling addresses you would rather forget, your browsing history is probably still full. The browser stores every visited page except the ones opened in secret mode, and that list keeps growing until you clear it manually. You can remove a single entry or wipe the entire history at once.

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Security & Privacy2

Toggle Screen Brighten for Face Recognition

Unlocking your Samsung phone with your face in a dark room briefly floods the display with light, and that flash can be distracting or draw attention at night. This behavior comes from the Brighten screen option tied to Face recognition, and it works independently from your normal screen brightness settings.

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Calls & Messages2

Create a New Calendar Event

If your calls, messages or appointments never show up in a shared calendar, no event has actually been created yet. The Samsung Calendar app pulls in every account you are signed into, but each appointment still needs to be added manually with the right time, location and reminder.

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Storage & Backup2

Clear Samsung Internet Browser Cache

If Samsung Internet keeps showing an outdated version of a website, images that will not update, or a page that fails to load correctly, stored cache files are usually the cause. The browser saves data locally to speed up loading times, but that same cache can hold on to broken or old content. Clearing it forces the browser to fetch a fresh copy of the page.

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Network & Connectivity2

Turn Location (GPS) On or Off

If navigation apps cannot find your position or refuse to load a route, Location access is often switched off on your Samsung phone. Weather widgets, Find My Mobile, and location-tagged photos rely on the same GPS toggle, so one setting affects several features at once. Turning it off saves battery but breaks any app that needs your real-time position.

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Security & Privacy2

Encrypt or Decrypt SD Card

If your Samsung phone gets lost or stolen, anyone can pull the SD card and read the photos or app data stored on it. Samsung lets you tie the card to your device with encryption so it becomes unreadable in any other phone or card reader. This only works reliably if you set a screen lock first, since the encryption is unlocked using your Pattern, PIN, or Password.

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Storage & Backup2

Restore Backup from Samsung Cloud

After a factory reset or on a new Samsung phone, photos, contacts, and app data can be missing even though a backup exists in Samsung Cloud. This usually happens because the restore step was skipped during setup or the wrong backup was selected. The right backup needs to be picked manually before missing apps and files come back.

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Security & Privacy2

Rename a Fingerprint

When you add several fingerprints on your Samsung phone, they all get generic labels like Fingerprint 1 or Fingerprint 2. If more than one person unlocks the same device, it gets confusing to tell whose print is stored where.

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