Turn Screen Cast On or Off
If your Xiaomi phone won't mirror to a TV or monitor, the built-in Cast feature might be turned off, or your phone and screen aren't on the same Wi-Fi network. Screen Cast behaves differently from many third-party mirroring apps, since playback usually stops the moment you turn off the display. That makes it easy to mistake a disabled toggle for a broken connection.
Connect to Wi-Fi Using a QR Code
Typing out a long Wi-Fi password on a Xiaomi phone gets tedious, especially with mixed case letters and symbols. If the network owner has a QR code ready, you can skip the password field entirely by scanning it with the built-in Wi-Fi scanner.
Send Photos and Videos via Bluetooth
Sending a photo or video from your Xiaomi phone to a paired device sometimes stalls right after you tap Share, or the target device never shows up in the list. This usually comes down to picking the wrong sharing option or Bluetooth pairing not being active. The steps below use MIUI's file sharing menu, which works the same for pictures, videos and most other file types.
Set Up a Portable Wi-Fi Hotspot
If your Xiaomi phone still hands out a hotspot name and password nobody chose, other people nearby can guess it or connect without permission. A weak default SSID also makes it harder to spot your own hotspot among several devices in the same room. Setting a custom name and password fixes both problems and keeps the connection under your control.
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.
Turn Off Wi-Fi and Bluetooth Scanning for Location
Even with Wi-Fi and Bluetooth switched off, your Xiaomi phone can still scan nearby networks and devices to sharpen its location fix. Apps with location permission trigger this background scanning automatically, keeping your radios active more often than expected. If you want tighter control over when your phone searches for networks, the scanning setting needs to be adjusted separately from the Wi-Fi and Bluetooth toggles.
Rename a Paired Bluetooth Device
When several Bluetooth accessories are paired to your Xiaomi phone, the device list can quickly fill up with cryptic model numbers or partial MAC addresses. Telling a pair of earbuds apart from a car stereo or a fitness tracker gets difficult once the default names look identical. Renaming each paired device gives you a clear label instead of guessing which entry belongs to which gadget.
Set Default SIM Card for Outgoing Calls
Every time you dial a number, your Xiaomi phone pops up a menu asking which SIM card to use for the call. If you only ever tap the same option anyway, that extra confirmation step just slows down dialing. A fixed default SIM removes the prompt for good.
Change Password for a Saved Wi-Fi Network
If your router password changed, your Xiaomi phone still tries to connect with the old one and just shows Saved, not connected. This is common after a router reset or a switch to a new internet provider. You do not need to forget the network and start over, the saved entry can be updated directly.
Set a Daily Mobile Data Usage Limit
A monthly data cap does not catch the one day you binge-watch or download something huge, and by the time the monthly warning fires the damage is done. On Xiaomi phones you can add a separate daily threshold so heavy usage gets flagged the same day it happens. You also decide whether MIUI just warns you or cuts mobile data automatically once the limit is hit.
App Location Permission Settings
If a Xiaomi app keeps showing the location icon even when you are not actively using it, its permission is probably set to allow access all the time. That drains battery and can expose more data than the app actually needs. You can review and change this setting for every installed app individually.
Save Location Info for Photos and Videos
Photos and videos from the Xiaomi camera arrive without any location tag, so sorting vacation shots by place later only works if you remember the trip yourself. That happens because the camera option for saving location info sits switched off out of the box. Turning it on lets the Camera app attach GPS coordinates to every photo and video you capture.
Turn USB Tethering On or Off
When you plug your Xiaomi phone into a PC or laptop to share its mobile data, the computer often prompts you to pick a connection type instead of connecting automatically. This happens because USB tethering sits in a separate toggle from your regular USB file-transfer mode. Without switching it on first, the cable only charges the phone or transfers files instead of sharing the data connection.
Share Wi-Fi Password via QR Code
Typing out a long Wi-Fi password for every visitor gets tedious, especially with random letter-number combos. Xiaomi phones can turn your current network credentials into a scannable QR code instead. Anyone with a camera can then join the network without you dictating a single character.
Add a Printer via IP Address or Wi-Fi Direct
If your printer does not show up automatically even though your phone and printer share the same Wi-Fi network, MIUI still lets you add it manually. This usually happens with older printers, devices on a different subnet, or printers that only support Wi-Fi Direct instead of standard network discovery. In that case you need to enter the printer's IP address yourself or switch on Wi-Fi Direct printing directly from the printing menu.
Turn Off Wi-Fi Hotspot Automatically
Leaving the personal hotspot active after every connected device disconnects quietly drains battery on Xiaomi phones. MIUI includes a setting that shuts the hotspot down on its own once nothing is using it, but most owners never notice it exists.
Pair a Bluetooth Device
If your headset, earbuds, or speaker will not connect to your Xiaomi phone, the accessory usually needs to be paired first before Bluetooth can use it. Until pairing finishes, the phone will not list it as an active connection, so audio and calls stay on the built-in speaker.
Limit Connected Hotspot Devices
By default, your Xiaomi phone lets an unlimited number of devices join your mobile hotspot at once. That can slow down your connection and makes it hard to track who is actually using your data. Setting a maximum device count gives you back control over who connects.
Unpair a Bluetooth Device
If a Bluetooth device keeps reconnecting even though you stopped using it, or a headset refuses to pair again after a failed connection, the old saved link is usually the cause. Turning Bluetooth off does not remove that link, only the paired list in the Bluetooth settings does. Once removed, the device drops out of the paired list and needs a fresh pairing before it can connect to your Xiaomi phone again.
Auto-download Updates via Mobile Data
If your Xiaomi phone keeps pulling system updates in the background while you are off Wi-Fi, mobile data usage can climb fast without warning. MIUI treats update downloads as automatic once a new version is detected, and a separate toggle decides whether mobile data counts as an allowed source for that download. Switching it off limits update downloads to Wi-Fi only, which matters if you are on a limited plan.
Select Network Manually
When you travel abroad and your phone keeps hanging on a weak carrier, automatic network selection is usually the cause. MIUI picks a network by signal priority, not by actual reception quality, so calls drop and data stalls even though a stronger carrier is available nearby. Switching to manual selection lets you pick that carrier yourself instead of waiting for the phone to reconnect.
Turn Wi-Fi Auto Reconnect On or Off
If your Xiaomi phone keeps rejoining a Wi-Fi network you would rather avoid, or the connection drops every time you walk back into range, the Connect automatically option tied to that specific network is behind it. MIUI turns this behavior on by default for every network you have ever joined, and it stays active until you switch it off for that network individually. That is also why disabling it on one network never changes the behavior of the others.
Turn Portable Wi-Fi Hotspot On or Off
If other devices cannot get online through your Xiaomi phone, the portable hotspot might simply be switched off or still using a network name and password you do not remember. This feature turns your mobile data connection into a Wi-Fi network for laptops, tablets or other phones nearby. Once it is active, the tricky part is usually finding the right toggle again, since it sits inside a settings screen most people only visit once.
Turn a SIM Card On or Off
On a dual SIM Xiaomi phone, calls or texts sometimes keep arriving on a line you no longer want to use, or you want to silence one number without pulling the physical card out. MIUI lets you deactivate a SIM slot completely, which stops all calls, messages and mobile data on that line until you switch it back on.