Set Default SIM for Calls
When your Huawei phone runs two SIM cards, calls placed through Quick dial or other shortcuts do not always go out over the SIM you expect. Without a fixed default calling SIM, EMUI picks a card automatically, which can lead to unwanted roaming charges or calls made from the wrong number.
Delete Saved Wi-Fi Networks
If your Huawei phone keeps jumping onto an old guest network instead of your home Wi-Fi, a leftover saved connection is usually to blame. EMUI remembers every network you ever joined, including outdated passwords and networks you no longer use. Removing the wrong ones fixes auto-connect issues and frees up the list for a fresh setup.
Enable or Disable SIM PIN
If your Huawei phone asks for the SIM PIN right after you ask for the screen lock code or pattern, you are dealing with two separate security layers at once. The SIM PIN protects the card itself, independent from the phone lock, which means both prompts can appear back to back at every restart. That extra step is often unwanted once you trust the environment where you use the phone.
Turn Stay Connected On or Off When Device Sleeps
If your Huawei phone keeps draining mobile data or battery after the screen goes dark, the Stay connected when device sleeps option in Battery settings is usually behind it. With it enabled, EMUI keeps your Wi-Fi or mobile data link active in the background even while the display is off. Switching it off can stretch standby time, but some messaging apps may then deliver notifications later than usual.
Show Network Speed in Status Bar
If you want to see how fast your Internet connection is running without opening a speed test app, EMUI has a built-in status bar indicator for this. Many Huawei phones ship with this network speed display turned off by default, so the numbers next to the notch stay hidden until you activate it. The speed only updates during active data transfer such as downloads, browsing, or background syncing.
Turn Bluetooth On or Off
Can't pair your Bluetooth headset or speaker? Your Huawei phone will not find any nearby devices until Bluetooth is switched on. Leaving it running when you are not using it also drains the battery faster and keeps the radio searching for connections in the background.
Mobile Hotspot Auto Turn-Off Timer
If your Huawei phone keeps the mobile hotspot running for hours after the last device disconnects, battery drains faster than it should. EMUI includes an inactivity timer that can shut the hotspot down on its own, but on many phones it is left set to Never. Without changing it, the hotspot stays active in the background even when nobody is using it.
Activate or Deactivate a SIM Card
If you run Dual-SIM on your Huawei phone, you might want to switch off one number without pulling the physical card out. A deactivated SIM stops receiving calls, texts and mobile data until you turn it back on. This control sits inside the mobile network settings, not on the SIM tray or lock screen.
Turn Personal Hotspot On or Off
When other devices show no internet connection through your Huawei phone, the personal hotspot is often switched off or was never configured. You can also give it a custom name and password so people around you connect quickly without sharing your regular Wi-Fi.
Set Up or Reset APN Settings
When mobile data stays off even though your SIM is active, a wrong or missing APN entry is often the cause. Carriers usually push this configuration automatically, but a failed update or a manual change can break the connection. If your Huawei phone shows a signal but no internet access, the APN list is the first place to check.
Show WiFi Password as QR Code
Typing out a long WiFi password for a visiting friend gets annoying fast, especially with mixed-case letters and symbols. Your Huawei phone can turn the password of a network you are already connected to into a scannable QR code instead.
Turn Location Access On or Off
If your Huawei phone keeps showing the location icon in the status bar even though you are not navigating or checking in anywhere, general location access is probably switched on for every app at once. This master switch overrides individual app permissions, so weather, maps, and social apps all lose GPS access the moment you turn it off. It is a different setting from disabling location for a single app.
Enable or Disable Background Data and Roaming for Apps
If a messenger like WhatsApp only shows new messages after you open the app, or your data bill spikes right after a trip, background data and roaming permissions for that app are usually the reason. EMUI lets you allow or block both separately for every installed app, so getting the setting wrong means either late notifications or an unexpected roaming charge.
Set Up a VPN Connection
Public Wi-Fi hotspots and open mobile networks let anyone nearby read your unencrypted traffic. On a Huawei phone the built-in VPN client stays empty until a server profile is added, so the connection option does nothing on its own. Once a valid server address, protocol and login details are entered, the phone tunnels your data, hides your IP and reaches sites that would otherwise be blocked.
Manually Select a Mobile Network
Near a border or in a rural area, your Huawei phone might latch onto a foreign network that offers a stronger signal instead of your home carrier. This happens because automatic network search always prioritizes reception over your default provider. Roaming charges or dropped data sessions are the usual result until you pick the carrier yourself.
Show SIM Card Messages
Old text messages you sent or received years ago sometimes disappear from your inbox after a SIM swap or a factory reset, even though they still physically sit on the SIM card. Huawei phones do not display these by default because the Messages app only loads device storage first. They are not deleted, just hidden from the normal conversation view.
Send a File via Bluetooth
When a Bluetooth transfer just sits there or the receiving device never shows up in the list, it usually means the two phones were never paired first. Bluetooth sharing on Huawei phones runs through the system Share menu, so picking the wrong app or an unpaired device stops the transfer before it starts. This guide walks through sending a single photo, though the same steps work for videos and other files too.
Turn Wi-Fi On or Off
If your phone keeps burning through mobile data at home or at work, Wi-Fi might be switched off without you noticing. On the other hand, a Wi-Fi radio left running all day in areas with no network drains battery for nothing. Knowing exactly where this switch sits on your Huawei saves both your data plan and your battery.
Set Preferred Network Type (2G/3G/LTE)
When LTE reception is weak, your Huawei phone can lose its data connection entirely instead of falling back to a stable signal. The preferred network type setting decides which mobile network your SIM tries to connect to, and picking the wrong option often causes dropped calls or painfully slow browsing.
Delete a Saved APN on Huawei
If a Huawei phone suddenly loses mobile data or MMS stops working after a SIM swap or carrier update, a leftover or wrong Access Point Name (APN) entry is often behind it. Manually typed APN details or an outdated carrier profile can block a clean connection to the mobile network. Removing the faulty entry is usually what lets the phone reconnect or accept a fresh APN.
Enable or Disable Emergency Location Service (ELS)
When you dial an emergency number or send an SOS text, your Huawei phone normally shares its location automatically so responders can find you faster. If Google Location Services are turned off, Emergency Location Service (ELS) steps in to determine your position instead, and whether it is active or not can matter in a real emergency. Many people never check this toggle until they need it.
Rename SIM Card
On a dual-SIM Huawei phone, both slots often show only the carrier name, which makes it hard to tell your two lines apart at a glance. This gets annoying fast if one SIM is for work and the other for personal calls. A custom label fixes that without touching your carrier settings.
Turn Mobile Data On or Off
If apps stop loading data outside Wi-Fi range or your phone shows no internet connection away from home, mobile data is likely switched off or an app is blocking background data. Huawei phones separate the mobile data toggle from Wi-Fi, so turning it off cuts cellular internet access completely once you leave a Wi-Fi network. A missing or wrong APN can cause the same symptom even when mobile data is already turned on.
Change the AP Band for Mobile Hotspot
Your Huawei phone hands out its mobile hotspot on 2.4 GHz by default, and that works with almost any WLAN device but slows things down once several gadgets share the same channel. Laptops, tablets or streaming sticks that support 5 GHz stay stuck on the slower band until you switch it manually. This shows up as sluggish transfers or buffering whenever more than one device connects to your hotspot at the same time.