How to set up the new Xiaomi Poco X3 smartphone: a complete guide from unpacking to fine optimization

The first steps with the new Xiaomi Poco X3: what to do immediately after unpacking

You just got the lucky owner of Xiaomi Poco X3, a powerful smartphone with a Snapdragon 732G processor, a 120 Hz display and a capacious 5160 mAh battery. But before you dive into games or social networks, you should set up the device correctly. Illiterate initial settings can lead to slowdown, fast battery discharge or even loss of warranty if you improperly manipulate your firmware.

This article will help avoid the typical mistakes of beginners. We will examine not only the basic steps (on, connect to Wi-Fi), but also hidden MIUI settings that Xiaomi does not advertise, such as how to turn off advertising in system applications or activate Game Turbo mode for maximum FPS in games. All instructions are relevant for Poco X3 NFC and Poco X3 Pro based on MIUI 14/15 (including global and European versions).

If you’re switching from an iPhone or a smartphone from another brand, look at the data port section — there are nuances with contact and backup formats. And owners of previous Poco models (like the Poco X2) will be useful to compare the changes in the interface of the new version of MIUI.

Activation and initial setup: from inclusion to account login

After removing the smartphone from the box, press and hold the power button (located on the right end) for 3-5 seconds until the POCO logo appears. The first turn on can take up to 2 minutes - this is normal, since the system conducts the initialization of components. Do not interrupt the process, even if the screen stays on the screensaver for a long time.

Next, you will be greeted by the MIUI Setup Wizard setup wizard, and here are the key points at this stage:

• 🌍 Language selection: We recommend installing Russian (Russia), as some translations in regional versions (e.g. Russian (Ukraine)) may contain errors.
• 📶 Wi-Fi Connection: Use a 5GHz network to speed up update downloads. If you don’t have one, choose 2.4GHz, but avoid public hotspots (such as in a cafe) – they can block Xiaomi servers.
• 🔑 Mi: Sans account will not allow you to use cloud storage, theme store and some features like Find Device. If you already have an account, log in via email or phone number. Create a new account only on the official website account.xiaomi.com - third-party services can be fraudulent.

⚠️ Note: If you are buying Poco X3 In China or on AliExpress, the smartphone can be linked to the Chinese account Mi. In this case, before setting up, be sure to unlock through the official Xiaomi service (cost) ~$5-10), otherwise the device will lock after 30 days.

In the personalization phase, the system will suggest you choose a design theme, and the best option is a dark theme with a focus on Blue or Green, which will reduce the load on the battery (AMOLED-POCO display X3 It's not available, but darker tones still save you charge. Turn off the Home screen Recommendations option, it adds unnecessary ad widgets.

MIUI Update: How to Check and Install the Latest Firmware

Xiaomi regularly releases updates for Poco X3, fixing bugs and improving performance.Be sure to check the firmware’s relevance before setting up, as the factory version often lacks critical security patches.

1. Go to Settings → About the phone → System update.
2. Click Check for updates.
3. If a new version is available, download it (the file weight is usually 1.5-2.5 GB).
4. After download, click Set and wait for the reboot (takes 5-10 minutes).

If the update is “hanging” during the Pre-Installation phase, try:

• 🔄 Reboot your smartphone and try again.
• 📴 Install the update via Recovery Mode (click Volume Up). + Power with the phone turned off).
• 💻 Use the Mi Flash Tool on PC (instructions below in spoiler).

After the update, check the MIUI version in Settings → About Phone. Current versions as of 2026:

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If the smartphone starts to warm up or discharge quickly after the update, reset to factory settings (Settings → Additional → Restore and Reset).

Performance Optimization: Settings for Maximum FPS and Smoothness

Poco X3 is famous for its gaming performance, but by default many features are disabled.

1. Activate 120Hz mode: Go to Settings → Display → Screen refresh rate. Select 120Hz (60Hz by default for battery saving). Enable Adaptive frequency so that the smartphone automatically lowers Hz in simple tasks (e.g. reading text).

Set up the Game Turbo

• Open Settings → Special features → Game Turbo
• Enable Improved Mode and add games to the list (e.g. PUBG Mobile, Call of Duty).
• Activate. 4D-Vibration and blocking notifications during play.

For an additional productivity boost:

• 🔋 Disable Battery Optimization for Games in Settings → Battery → Optimizing the battery.
• 🗑️ Clean the cache once a week through Settings → Warehouse → Cleaning up (especially if you play heavy games).
• 📱 Enable CPU Overclocking in the engineering menu (instruction below).

To access the engineering menu (hidden processor settings):

1. Open the Phone app.
2. Enter the code ##4636##.
3. Go to the Battery Information tab.
4. Click on the Menu (three dots) → CPU settings.
5. Select the Performance profile (instead of the default Balanced).

⚠️ Attention: Performance mode increases the heat of the smartphone. Use it only during games and return to Balanced after.

Battery setting: how to extend the operating time without recharging

The 5160mAh battery in the Poco X3 promises up to 2 days of operation, but in practice many users face a quick discharge.

• 📡 Constantly active 5G (If supported by your model).
• 🔍 Background activity of social networks (Facebook, Instagram).
• 📍 Geolocation services (especially Google Maps in navigation mode).
• 🎮 Games with high graphics settings.

To optimize the cost:

For deep optimization:

1. Go to Settings → Battery → Battery Mode.
2. Choose Balanced (for everyday use) or Economical (if you need to extend your work time).
3. Turn on Adaptive Charging – it limits the charge to 80% at night to reduce battery wear.

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The most effective way to save charge is to turn off Auto Brightness and manually set the value by 50-60%, which reduces consumption by 25-30% without noticeable discomfort.

Transferring data from another smartphone: contacts, photos, applications

If you're switching to the Poco X3 from another device, you can transfer data in a number of ways.

• 📱 Mi Mover (built-in app): Open Mi Mover on both phones. On the old device, select Send, on the new device, Receive. Connect to the same Wi-Fi network and follow the instructions. Supports: contacts, messages, photos, videos, music, some apps.
• ☁️ Cloud Services: For Contacts: Sync with Google Account (Settings) → Accounts. → Google → For photos: use Google Photos or Mi Cloud (5GB free).
• 💻 Computer: Connect both phones to your PC. Copy files (photos, videos) from one device to another via Explorer. APK Extractor (extract) APK From the old phone and set to the new one).

⚠️ Note: When you move over Mi Mover, you won't transfer: Wi-Fi passwords (you'll have to re-enter them), some app settings (like WhatsApp will require re-activation), game data (save them). PUBG Mobile, Clash of Clans, etc. – these need to be synced through the accounts in the games themselves. If you are transferring data from your iPhone, use the Move to iOS app (available on the App Store), but keep in mind: 🍎 Music and books from iTunes will not be transferred. 📱 Apps from the App Store will have to be re-installed via Google Play. 🔒 iMessage messages don't sync - export them manually through iCloud.Hidden features and chips MIUI, which you didn't know MIUI It hides a lot of useful features that are not obvious at first glance. X3: 🔍 Search by Settings: At the top in Settings is the search bar. Enter a keyword (e.g., “battery” or “gestures”) and the system will show all related options. 🎵 Separate sound management: In Settings → The sound can be separately adjusted volume for Multimedia, Calls and Alarms. 📸 Hidden camera: In the Camera app, swipe your finger across the screen to the left - a menu with additional modes will open (Documents, VLOG, Clone). 🔒 Second Space: Create a separate work profile with other apps and settings (Settings) → Special facilities → Second space, useful for separating work and personal life. 🌙 Reading in the dark: Enable Reading Mode in Settings → Display: The screen will turn black and white, which reduces the strain on the eyes at night: 🎨 Install custom icons through Mi Themes (the store has free packs). 🔄 Change the interface animation: Settings → The phone. → Version. MIUI (tap 5 times in a row, the Developer menu will open, where you can turn off the animation of the windows). 📲 Add navigation gestures: Settings → Display. → Full-screen display → Gestures (recommended) MIUI Full-screen gestures instead of standard buttons). 💡To remove ads in system applications (such as Mi Video or Mi Music), go to Settings. → Memory. → Clean and disable the Recommendation option (some regional firmware may not have this option).Security and privacy: how to protect your data Poco X3 collects a lot of data about the user, from location to application history. To minimize risks: Turn off diagnostics collection: Go to Settings → The phone. → User feedback: Turn off Error Reports and Participate in Improvement MIUI. Configure permissions for applications: In Settings → Privacy → Permissions, check which apps have access to Camera, Microphone, and Geolocation. Disable access for unnecessary apps (for example, why does Facebook need your SMS?).

Enable application locking

• In Settings → Block applications add applications that you want to protect with a password (for example, Gallery, Bank).
• Use a fingerprint or facial recognition to unlock quickly.

To protect against viruses:

• 🛡️ Install Malwarebytes or Bitdefender from Google Play (Xiaomi’s built-in Security isn’t always effective).
• 🔗 Don't install it. APK-Files from unknown sources (disable Unknown sources in Settings) → Confidentiality).
• 🔄 Regularly update apps – especially messengers (WhatsApp, Telegram), where vulnerabilities are often found.

⚠️ Note: If you are buying Poco X3 hand, be sure to reset to factory settings (Settings) → Additionally. → Recovery and reset: The previous owner may have left their accounts or spyware behind.

FAQ: answers to frequent questions about setting up Xiaomi Poco X3