Did you know that your Android phone hides real treasures that most users ignore? Although many people think they know their smartphone inside out, Android includes a lots of hidden features and secret settings that can transform your daily experience, enhance security, improve privacy, optimize performance, and offer you amazing benefits.
In this extensive and detailed tour we reveal to you The best kept secrets of the Android operating systemFrom advanced profile management to powerful hidden codes, including features to boost productivity, protect your data, enhance accessibility, visual customization, and advanced device interaction. Each feature has been carefully explained with step by step, tips, safety warnings and context about its most useful uses or scenarios where it can really make a difference.
Ready to discover everything you can do with your Android phone and move beyond being a basic user? Read on and become a smartphone expert.
User profiles and guest mode: privacy protected when lending your phone
One of the most powerful and least exploited sections in Android is user management and the guest modeSimilar to a computer's account system, it allows you to set separate settings or restrict access to your apps and personal data when you lend your phone.
- Create a guest profile: Swipe down from the notification bar, tap the user icon on the right, and select “Add user” or “Guest.” From there, Android creates a clean, secure environment without access to your apps, photos, or accounts.
- main advantages: Ideal for parents who lend their phone to their children, for situations where someone needs to use your device temporarily, or for isolating sensitive information in shared environments.
- Limitations and tipsSome manufacturers disable or modify this feature based on their customization layer. Not all apps will be available, and to return to the main profile, simply select it from the user icon.
Wi-Fi tethering and internet sharing options: your phone as a portable router
Did you know you can turn your Android smartphone into a Wi-Fi router and share your internet connection with other devices? This function, known as WiFi access point or tethering, is ideal when someone near you doesn't have data or you need to connect your laptop to the mobile network.
- Basic activation: Go to Settings > Network & Internet > Wi-Fi hotspot or Personal Hotspot. Set a secure name and password.
- Recommendations: Always enable WPA2 or higher encryption and Never share your password with untrustworthy peopleBattery and data consumption can grow quickly.
- Share WiFi by QRStarting with Android 10, you can generate a QR code to quickly share access to your network. Just tap on the connected Wi-Fi network and choose "Share."
- Hidden diagnostic codes: Use combinations like * # * # * # * # 232339 to perform quick tests on your WiFi connection and ensure it is working.
Large icons and magnification gestures: visual accessibility for everyone
If you have noticed that the icons and text on the screen look too small or you need to adapt the interface for comfort or visual problems, Android offers advanced accessibility options.
- Magnification gestures: From Settings > Accessibility > Magnification Gestures you can activate an option that allows temporarily enlarge any area of the screen by triple-tapping or pinching.
- Change font size and display: Go to Settings > Display > Font Size or Display Size and adjust to your liking for a more comfortable and personalized experience.
- Customizing icons and grid: Some manufacturers allow you to choose the number of icons per row/column on the desktop, increasing the size to your preference.
Advanced security management: remote location and locking in case of loss or theft
Losing your phone can be a big problem, but Android integrates Completely free protection and location tools that can help you recover your device or at least protect your personal information.
- Find my device: Go to Settings > Security > Find My Device. By enabling this feature, you can locate your phone on a map from any browser, ring it, lock it, or erase its contents if you think it's lost.
- remote lock: Allows you to secure your smartphone by sending a message, contact number, or even blocking access with a personalized code from Google.
- App permission control: From Settings > Apps > Permissions you can disable or limit apps' access to your contacts, location, microphone, and more.
- Secret codes to check the status of your mobile phone: Mark ## 4636 ## in the Phone app to access usage statistics, hardware tests, and view system details.
Accessibility and voice features: text-to-speech, notification readout, and more
Android allows you to take advantage of voice synthesis technology not only to dictate messages, but also to the phone reads aloud texts and notificationsThis is especially useful for people with visual impairments or those seeking convenience when consuming content without looking at the screen.
- Text to speech: Go to Settings > Accessibility > Text-to-speech output and choose the voice, language, and reading speed. Supported apps like ebook readers or messaging apps can take advantage of this feature.
- Reading notificationsSome apps and virtual assistants allow you to read incoming notifications aloud, ideal for when you're driving or have your hands full.
- Live subtitles: Activate Live Caption from the Sound & Vibration menu to automatically generate captions for videos, podcasts, and audio, even when offline. Useful for people with hearing loss or in noisy environments.
Total battery savings: black backgrounds, dark mode, and smart power management
Saving battery is a priority for any user. Android offers little-known solutions that add hours of extra usage to your day.:
- black wallpapers: Especially on AMOLED displays, selecting a black background turns off pixels and dramatically reduces power consumption. Change the background from Settings > Wallpaper > Select Black Background.
- Dark mode: Activate it from Settings > Display > Dark Theme. It reduces eye strain and battery drain in almost all compatible apps.
- Smart battery: From Settings > Battery > Smart Battery, your Android learns from your habits and limits background app consumption.
- Show battery percentage: Enable the percentage display in the status bar for precise battery level monitoring.
Android Secret Codes: Access Advanced Menus and Diagnostics
Android hides powerful secret codes that are entered from the Phone app and open hidden menus, diagnostics, hardware tests and advanced settings.
- * # # 06: Displays the IMEI, essential for identifying the terminal or blocking it in case of theft.
- * # * # * # * # 4636: Access usage statistics, battery test, network, WiFi, and general device status.
- * # * # * # * # 44336: Detailed information about the operating system and updates.
- * # # 0228: Battery status.
- * # # 301279: Advanced mobile network information.
- * # * # * # * # 232339: Test the WiFi connection.
- ## 7594 ##: Turn off your phone quickly.
- 27673855 #: Reset the terminal to factory settings (Caution: erases all data!).
Developer Options: The Advanced Menu That Multiplies Your Possibilities
Android hides a menu of Developer Options only suitable for those who want to thoroughly customize the behavior of the system.
- How to activate them: Go to Settings > About phone > Software information and tap “Build number” 7 times. A notification will appear and a new menu will open.
- Main useful options:
- USB debugging (to connect your phone to your computer and perform backups or advanced installations).
- Adjust the speed of animations to make your phone run faster.
- Limit background processes to save battery.
- Display CPU, memory, GPU, and other resource usage in real time.
- Force maximum screen refresh rate.
- Caution: Do not modify options you are not familiar with to avoid system failures.
Emergency Medical Information: Vital Help at Your Fingertips
In a critical situation, your Android mobile can be a fundamental ally when display emergency medical information on the lock screenEnter your medical information (blood type, allergies, medications, emergency contacts) from Settings > Security > Emergency or Medical Information. Only medical services or trusted individuals will be able to access this information from the emergency option without having to unlock your phone.
Digital Wellbeing and Parental Controls: Monitor mobile usage and protect your children.
Google integrates Advanced tools to analyze and limit usage time, view daily activity details, receive reports, and set restrictions by app or category.
- Set usage limits: Decide how long you can use social media, games, or any other apps.
- Activate focus mode: Silence apps and notifications to work or study without distractions.
- Monitor sleep and rest mode: Set schedules so you don't get interrupted at night.
- Add parental controls: Monitor your little ones' device usage and protect access to sensitive content.
Split screen and true multitasking: use two apps at once like a pro
Android allows you to open two apps simultaneously in split screen, ideal for taking notes while watching a video, chatting and browsing, or combining work and leisure without missing a beat.
- Open the desired apps and tap the recent apps button.
- Press and hold the icon of the app you want to pin to the top and select “Split Screen.”
- Select the second app for the bottom panel.
- Adjust the size by dragging the divider as needed.
Some devices even allow you to pin app combinations or save favorite pairs to instantly launch your workflow.
Features for visual customization and design: give your phone a unique touch
Android has made great strides in visual customization, allowing you to tailor the interface to your style and needs:
- Change the wallpaper to your own images, solid colors, or animated backgrounds.
- Activate thematic icons to match the icon colors to your home screen background.
- Modify the app grid to choose how many icons appear on the desktop.
- Customize the clock and lock screen widgets.
- Use dark mode programmed for an elegant and functional design.
Diagnostic and Cleaning Codes and Features: Advanced Information and Maintenance
In addition to battery and system diagnostics, there are Codes and tools to clean your system, free up space, and improve performance:
- * # # 9900 (on some Samsung): Access advanced options for cleaning temporary files and logs.
- Storage and app information: Settings > Storage > Apps to see which ones are consuming the most space and make cleanup decisions.
- Archive appsIn the latest versions, you can archive rarely used apps, freeing up space but preserving their data so you can restore them if you need them in the future.
Smart tools and productivity: personal dictionary, shortcuts, and private space
Android integrates advanced productivity tools to make your daily life easier.:
- Personal dictionary: Create auto-complete phrases or keywords to type faster in any app.
- Shortcuts in the app launcher: Press and hold an app icon on the desktop to access direct actions (New note, Create event…).
- Private spaceSome phones include a “Private Space” or a secure folder where you can hide sensitive apps and files protected by a fingerprint, PIN, or password.
Real-time translation and Google Lens: breaking down language barriers
Android and Google Lens allow you to translate any text in real time using your phone's camera.Just open the camera icon in the search bar, select "Translate," and point it at the text to get the translation right on the image. Useful for menus, instructions, documents, or announcements anywhere in the world.
Additional privacy controls: fine-grained permissions, precise location, and shared photo management
Privacy protection has taken a leap forward with options such as:
- Allow access to only selected photos and videos when an app asks for permission to "Gallery." This way, it doesn't access your entire album.
- Turn off precise location and only allow access to approximate location per app.
- Revoke access to the microphone or camera globally from Privacy Controls to prevent inadvertent listening or recording.
Notifications and advanced management: history, priority, and customization
Android integrates Very useful tools to manage notifications and not miss any important information:
- Notification history: Activate it from Settings > Notifications > Notification history to recover alerts that you accidentally dismissed.
- Hide sensitive notifications on the lock screen to protect your privacy.
- Customize the priority of chats and apps so that only really important alerts are displayed.
- Set flash or visual notifications so you don't miss any alerts if you have your phone on silent.
Customize buttons and gestures: control your phone the way you want
Android allows you to choose between gesture navigation or classic buttonsYou can even configure the power button to launch the Google Assistant with a long press, or switch between screens, apps, and menus with simple taps.
- Activate one hand mode to easily operate the mobile phone with one hand, moving the interface to one side.
- Use the accessibility menu (floating button) to quickly access actions such as screenshots, lock, or volume control.
Additional codes and diagnostic tools by brand
Brands like Samsung and Google Pixel offer extra codes for in-depth diagnostics:
- * # 0 * #: Diagnostic menu to test the screen, vibration, speakers and sensors.
- * # * # * # * # 7287: Advanced hardware and sensor diagnostics.
- Other manufacturers may have their own hidden menus, so check your model's manual or official website.
Automation and auto-replies: simplify your daily life
With the right tools you can Set up automatic replies in messaging apps, emails, or virtual assistantsGmail, WhatsApp, and productivity apps allow you to schedule messages to respond to while on vacation, after hours, or to streamline repetitive tasks.
Emergency, SOS, and personal safety tools
Android goes a step further in security with options such as:
- Physical button to send SOS by tapping the power button several times, sending your location and an alert to predefined contacts.
- Advanced emergency management: Direct access to emergency calls, medical information, and priority contacts from the lock screen.
Additional tools for productivity and smart multitasking
- Record screen: Use the shortcut from Quick Settings to record what you do on the screen, ideal for tutorials or sharing solutions.
- Archive rarely used apps: Reduces resource consumption and frees up space without losing your settings when reinstalling.
- Copy text from apps in the background: Select text even from apps you don't have actively open from the recent apps menu.
- Persistent screen split: Save combinations of apps to always launch them together if you use a regular workflow.
Protect your data with extra security and privacy strategies
- Set up automatic unlocking in trusted locations or with trusted devices to avoid having to enter a PIN or fingerprint every time you are at home, in the car, or next to your smartwatch.
- Activate smart lock by face, fingerprint, voice or pattern, according to your preferences and desired level of protection.
- Choose default apps so that all links, calls, and actions always open with your favorite apps.
Android is much more than a basic operating system. It's a comprehensive platform that, with a little curiosity and knowledge, allows you to Adapt your mobile phone to your security, privacy, productivity, accessibility, and customization needsMost of these tools are already included in your device without the need to install anything additional; you just have to explore, configure, and get the most out of them.
Start putting the hidden features we've shown you into practice, experiment without fear (following proper safety precautions), and your smartphone will become a much more powerful, secure, and truly personalized tool for your life and priorities.