Your Android phone has become that object you carry around. 24 hours a day and where you keep practically your entire digital lifeBank accounts, private chats, photos, access to work, social media, medical records, and much more. It's not just a phone; it's your wallet, your calendar, and, in many cases, your office.
That's why it's not enough to leave it as it comes from the factory. Properly configuring Android makes the difference between a secure, fast, and convenient device, and one full of risks and inconveniences.In the following lines you will see, step by step, how to take advantage of quick settings, security and privacy options, initial setup, advanced system functions and even what happens behind the scenes when you change parameters such as language, font size or dark mode.
What is the Android Settings app, really, and why does it matter?
The Android Settings app is the system's command center, the place from which you can control network options, security, sound, display, accounts, battery, and many more system sectionsEach manufacturer (Samsung, Xiaomi, Motorola, Pixel, etc.) customizes its appearance a little, but the base is always the same.
In Android 7.0 and later versions, the main Settings screen was revamped to include suggested configurations and customizable status alertsThose reminders that encourage you to activate backup, set up Do Not Disturb, or link a new account come from there and can be adapted by manufacturers and developers.
Android 8.0 introduced a new information architecture for the Settings app with the aim of It will be easier to quickly locate any option, even on mobile phones with hundreds of different parameters.Android 9 continued to refine this structure and added more configurable features.
Additionally, since Android 8.0 the Settings app can display Smart suggestions that promote device featuressuch as “Set Do Not Disturb schedule” or “Enable Wi-Fi calling.” These suggestions can be personalized so that each mobile device highlights what is most relevant to its user.
As if that weren't enough, the search function within Settings has improved considerably. Android indexes configuration parameters so you can find them using the internal search engine.even if they're in deep menus. Manufacturers can mark their own options so they also appear in the Settings app search results.
Quick Settings Panel: Control your Android from any screen
To see the first Quick Settings buttons, simply Swipe down once from the status barIf you swipe again, the full panel unfolds with more icons and additional controls, including media controls.
Turning functions on or off is as simple as tap the corresponding icon: Wi-Fi, Bluetooth, Mobile dataflashlight, airplane mode, etc.When a setting is turned off, the icon appears dimmed; when you turn it on, it lights up or changes color so you can identify it instantly.
In many of these panels, if you tap on the setting name (not just the icon) you can directly access more detailed options for that specific functionAnd if you press and hold the icon for a second, the system usually takes you to the advanced section of the Settings menu related to that setting.
To edit the panel, swipe down twice and tap the option to Edit or the pencil icon (depending on the manufacturer)From there you can add new shortcuts, delete those you don't use, and rearrange them to always have what you really need at hand.
The basic steps to customize the panel they are usually:
- Swipe twice From the top to see the entire panel.
- Click on Edit or the equivalent icon.
- Drag new settings from the lower area to the visible part.
- Remove a setting by moving it to the hidden items section or by tapping Remove.
- Rearrange by dragging the icons to the desired position within the grid.
On some mobile devices, you can change the size of certain tiles: If you only want the icon to be visible, you collapse it.If you prefer to see the name and icon occupying more space, expand it by dragging its right edge.
Keep in mind that some apps may ask for permission to add a custom box to the quick settings panelIf you're not interested, you can decline; and if you ever regret it, you can always remove it or add it again from the same editing menu.
When you have many functions active, some phones hide icons to save space and only show a small dot or indicator. If you see that dot, tap the top area to reveal hidden icons related to networks, Bluetooth, or other system states..
Quick audio and video control from the status bar
In addition to the classic icons, the panel that appears when you pull down the bar includes a Unified multimedia control for the audio and video being playedThis is especially useful if you're listening to music on Spotify while watching a video in another app.
By swiping down from the top while listening to something, you'll see a panel that tells you what is playing, from which app, and what controls are available: pause, resume, fast forward or rewind, and even change the audio output.
If you click on the panel (usually on the album art or track name), the system takes you directly to the app that is playing the multimedia contentwithout having to search for it among all the ones you have open.
When there are two audio or video sources at the same time, you can slide the multimedia panel sideways to switch between them and decide what you want to control at any given time, which is practical if, for example, you have a YouTube video playing in the background and a playlist in another app.
The sound output device (phone speakers, Bluetooth headphones, smart speaker, etc.) usually appears in the upper or lower corner of the panel. By tapping that name, you can choose which audio accessory you want to send the sound to., perfect for switching from your phone's speakers to Pixel Buds or an external speaker in seconds.
Essential security and privacy settings on Android
Your Android phone stores so much confidential information that it's almost mandatory to review the section on to maximise security and your enjoyment. calmly. The system offers encryption, biometric locking, and advanced protection, but all of that depends heavily on how you configure it.Let's look at the sections that should be tied up as soon as possible.
Screen lockIf anyone can turn on your phone and go directly to the home screen, everything on it is easy prey. Go to Settings > Security or Lock screen (depending on the brand) and configure a PIN, pattern or strong passwordThen add fingerprint or facial recognition, if your model allows it, and set a short auto-lock time so that the screen locks as soon as you leave the phone inactive.
Two-step verification on your Google accountYour Google account is your gateway to Gmail, backups, photos, contacts, and much more. In the Settings app, go to Google > Manage Google Account > Security and locate the option Two step verificationActivate it and choose the second factor: SMS, authenticator app, or physical key. That way, even if someone steals your password, they won't be able to log in without that extra code.
System and app updatesMany security vulnerabilities are fixed with patches delivered over-the-air (OTA) or through Google Play. Go to Settings > System > System update and make sure that Automatic updates are enabled, or you check them frequently.On Google Play, go to your profile > Settings and enable automatic app updates to reduce the risk of known vulnerabilities.
anti-malware protectionAndroid integrates protection systems like Google Play Protect, but you can also use additional security apps if you deem it necessary. These systems They analyze apps, links, and files in search of suspicious behavior.Keeping them active is like having a safety net in case you accidentally download something malicious.
Avoid unnecessary rootingAlthough rooting your phone allows you to change almost everything, it also It breaks down many of the system's security barriers.Any app with superuser permissions could wreak havoc. If you're unsure what that entails and don't need very specific functions, the wisest course of action is to leave your device unrooted.
Find my deviceThis feature is vital if your phone is stolen or lost. You can find it in Settings > Security and Privacy > Device Finders (the name may vary). Activate the option that allows you to remotely locate, lock, ring, or erase the device. Check that you have location services enabled and that your Google account is correctly added.
Review of app permissionsMany apps request access to your camera, microphone, location, contacts, or storage when they don't always need it. Go to Settings > Privacy or App Permissions and check What permissions does each app have and under what conditions?Ideally, leave most options set to "Only while using the app" and deny anything that doesn't make sense.
secure connectionsNot all Wi-Fi networks are reliable, and leaving Bluetooth always on isn't a good idea either. Go to Settings > Wi‑Fi and uncheck options that automatically connect to open or public networks. Turn off Bluetooth and other protocols when you're not using them from the quick settings panel to minimize the attack surface.
Hide notification content on the lock screenTo prevent anyone from reading messages, codes, or emails without unlocking your phone, go to Settings > Notifications > Lock screen notifications and choose to show only the app name or hide sensitive contentMany customization layers allow you to configure this option app by app.
Diagnostic and usage dataAndroid collects anonymous information about how your device works to improve the system. If you prefer to share less data, go to Settings > Security and privacy > More security and privacy > Usage and diagnostics (or a similar name). disable the sending of statisticsIn return, you can gain some battery life and a little more privacy.
Automatic backupsLosing your phone is a minor tragedy if you can restore it almost exactly the same on another device. Go to Settings > System > Backup and enable the option to back up to the cloud (Google Drive or other manufacturer services)Make sure that contacts, call history, SMS, apps, and important settings are copied.
Device and microSD encryptionOn many modern phones, the internal memory is already encrypted by default, but it's a good idea to check in Settings > Security and privacy > More security and privacy > Encryption and credentials. If your phone allows it, It also activates microSD card encryption. so that, if extracted, the content remains unreadable without your key.
IMEI and carrier blockingThe IMEI is the device's unique identifier. Dial *#06# to view it and write it down in a safe place. In case of theft, you will be able to use it. Ask your operator to block the line or SIM and, in some cases, declare the mobile phone unusable on the networksmaking it difficult to resell.
Adjustments to improve performance, battery life, and user experience
Beyond security, Android allows you to adjust a number of parameters that influence how the phone feels on a daily basis: interface speed, battery consumption, ease of use, etc. Small tweaks They can make a regular mobile phone feel much more responsive..
System animationsOn many models, you can reduce the animation to make everything seem faster. First, enable Developer Options (Settings > About phone > tap Build number several times), and then enter that new menu to search. Window animation scale, transition, and animatorChange all to 0,5x to make transitions faster without disabling them completely.
Battery protection and optimized chargingBatteries suffer when they remain plugged in for extended periods. Some manufacturers offer modes like Battery Protection, Smart Charge, or similar within Settings > Battery. Enabling these allows... The phone limits charging or manages it more intelligently, extending battery life..
Preventing accidental touchesMany mobile phones include options like Pocket Protection or Prevent accidental touches, usually found in Settings > Display or in advanced features. Activating these features allows the system to... It reduces the likelihood of the phone turning on by itself in your pocket or opening apps when you touch the screen..
Postponed notificationsSome Android versions allow you to snooze notifications so they reappear later without having to mute the entire app. You'll usually find an option like this in Settings > Notifications > Advanced settings. Allow snoozing notifications or repeating notificationsOnce activated, you can swipe a notification slightly and choose how long you want to postpone it.
Automatic unlocking upon entering a long PINIn certain models, if we use a PIN of six digits or more, it is possible to tell the system that Accept the PIN without pressing the OK button.This option is usually found in Settings > Lock screen > Lock type and is called something like “Confirm PIN automatically”.
Advanced features: developer options and lesser-known tricks
Android includes a hidden advanced menu for users who want to go a step further. Developer options aren't just for programmersThey are also used to adjust performance details, debugging, connectivity, and gestures.
To activate them, go to Settings > About phone > Software information (or similar) and tap seven times in a row on Build NumberThe system will ask for your PIN or pattern, and then you'll see a new section called Developer options within Settings.
From there you can, for example, enable predictive backward gestures on compatible phones. This feature shows a preview of where you'll return to when you perform the back gesture, preventing you from accidentally closing an app. It's usually found in Developer Options > Predictive backward gestures.
Another useful tweak is the aforementioned animation scaling change, which makes the system feel more responsive. You'll also find Options to debug via USB, limit background processes, force dark mode, or show screen touchesAmong many other functions. It's best to proceed with caution and not touch anything you don't understand, but there are some very practical settings for advanced users.
In addition, there are specialized apps that offer direct shortcuts to specific sections of Settings that are sometimes very hidden. These apps show a huge list of system menu shortcuts on the table:
- Accessibility
- Add Account
- Airplane mode
- Developer Options
- Application settings and default apps
- Automatic rotation
- Battery saving
- Bluetooth and paired devices
- Data, roaming and data usage
- Date and Time
- Device Information
- Screen, brightness, screensaver
- Physical keyboard and input method
- Internal storage and SD
- Language and region
- Location
- SIM and network operators
- NFC and mobile payments
- Special notifications and permissions (overlay, precise alarms, usage, etc.)
- Privacy, security, VPN, background data usage
- Personal dictionary, voice input, and WebView
- Wi-Fi, IP and advanced wireless networks
- Ads, essential Android modules, and much more
With these tools you can go directly to the section you want instead of navigating through multiple menusThis is especially useful in heavily customized user interfaces. If you're interested in creating shortcuts, check out guides on how. create shortcuts to specific sections of the system.
Initial Android setup: Getting the first boot right
When you turn on an Android device for the first time, the system guides you through a setup wizard. Although it may seem like a quick process, The decisions you make in those few minutes affect how you'll use your phone for years to come..
The first step is to choose the device's language. It's not complicated, but make sure you select the correct language. Language and region help with date formatting, currency, and some local servicesNext, the device will usually show you a list of Wi-Fi networks to connect to. It's recommended to choose a secure network from the start so that the device can download updates and sync data.
According to the manufacturer, you will also see screens to accept license terms and permissions related to shipping. Information about errors, device usage, and improvementsYou can accept or decline according to your privacy preference, keeping in mind that some services depend on this data.
One of the key steps is signing in with your Google account. If you already use Gmail, YouTube, or other Google services, you already have an account set up. By choosing “Yes,” you will be able to Enter your email and password to associate it with your phone and activate the synchronization of contacts, emails, apps and backups.
If you don't have an account, the assistant will suggest creating a new one from scratch. You'll need to fill in your first and last name, choose a username, define a strong password, and, if you wish, Configure a recovery method such as SMS or an alternate email address. so you don't lose access if you forget your password.
Later you are asked which Google services you want to use: automatic backup, location services, receiving commercial communications, etc. It is recommended to activate at least backup and some location services, as they are essential for Finding My Device and for restoring your information if you change your mobile phone.
The final step is usually to accept the privacy policy and terms of use. Once finished, your device will be synced with your account. and automatic access to Google Play Store, Gmail, Google Photos and the rest of the integrated servicesThat initial configuration sets the foundation for everything that will follow.
Device configuration changes and how they affect apps
When you change something like font size, screen orientation, language, or dark mode, it's not just the system's appearance that changes. Android informs apps that the device settings have changed, and many of them are internally “rebooting” to adapt to the new situation.
Amongst the configuration changes The most common ones are:
- Vary the app display size or screen density.
- To switch from vertical to horizontal (or fold/unfold a device).
- Modify font size and thickness.
- Change regional settings (language and country).
- Toggle between light mode and dark mode.
- Connect or disconnect a physical keyboard or other peripherals.
On devices with large screens such as tablets or foldable devices, these changes are even more frequent because the user may be constantly rotating, resizing windows, or using multi-windowFor developers, this means they must prepare their apps to adapt and maintain state.
When this type of change occurs, the system typically destroys the app's visible activity and recreates it. This is known as Recreation of ActivityAndroid calls onDestroy() on the current instance and then calls onCreate() again with the new configuration. This redraws the interface, respecting the new language, screen size, or theme.
This behavior has clear advantages: if you change the system language, for example, The text strings are automatically reloaded using the new language. without the user having to manually close and open the app.
Preserve app state despite configuration changes
From the user's point of view, the important thing is that when rotating the screen or changing the language, The app won't lose what you were doingNobody wants to fill out a long form, open another app for a moment, and then come back to find it empty.
That's why Android offers different ways to preserve the state of the interface and user data when an Activity is recreated. Among the main strategies are:
- Local persistence with databases or systems like DataStore, for complex or large data that must survive even process shutdowns.
- Items retained such as ViewModel, which are kept in memory while the user navigates through the app and preserve the UI state in the face of rotations or other changes.
- Saved instance state, designed for interface data that depends on recent user input, for example the text you were typing in a field.
Developers should test their apps by causing configuration changes in different situations: Rotate the device, use multi-window, change light/dark theme, modify font size or languageConnecting keyboards, etc., both in the foreground and background. This ensures that the state is preserved and there are no unexpected failures.
Although there is an option to indicate in the manifest that an Activity "handles itself" for certain changes (using the android:configChanges attribute), this is an advanced solution that transfers the responsibility of Manually update all interface resources when the configuration changes.If done incorrectly, it can lead to an inconsistent experience or visual errors.
In classic view-based applications, when recreation is disabled for a specific change, the Activity receives a call to onConfigurationChanged() and must decide which UI elements to update with the new resourcesThis greatly complicates the use of alternative resources (tablet layouts, landscapes, languages, etc.), so it is only recommended in very specific cases.
In Jetpack Compose, the system is more focused on reacting to configuration changes through recomposition. Through LocalConfiguration, composable functions They read the current configuration as an observable stateSo if you change the language, theme, or size, the parts of the UI that depend on it are automatically redrawed.
Even so, even in Compose, the recreation of Activities cannot be completely avoided. The important state still needs to be robustly stored. to withstand process shutdowns, unavoidable configuration changes, or system resource constraints.
What data does the “Android Device Settings” service send to Google
Within the Android ecosystem, there is a less visible but very important service: the Android Device Settings service. This component is responsible for Periodically send certain device data to Google to ensure the system stays up-to-date and functions correctly.
Among the information that collects are included:
- Device and account identifiers: IMEI, MEID, ESN, serial number, Google Framework Android ID, MAC addresses and, if applicable, the associated Google account.
- Device attributes: hardware type, model, manufacturer, CPU types, screen configuration and size, total memory, language, time zone, etc.
- System and security software version: OS build fingerprint, Android version, Google services version, build timestamp, security patch level.
- Network connectivity and performance data: SIM and operator, IP, SIM subscription data (MCC/MNC, roaming status, default functions, truncated part of IMSI) and logs of recent connections to the configuration service itself.
This data is used for multiple purposes: Determine if your device needs a security update, ensure that the apps you see on Google Play are compatible with your screen and hardware, and protect the system against fraud or abuse. (for example, by detecting suspicious logins) and develop aggregate metrics on how mobiles connect to networks and how to optimize battery consumption.
It is not possible to manually delete this information while the device is in use, as it is necessary for the proper functioning of the service. However, if you sign out of your Google account or remove it from the deviceThe data will no longer be linked to that account and the service will automatically delete the associated information after a period of inactivity.
If you want to see what this service has stored about your devices, you can download a copy from Google's "Download your data" page by selecting “Android Device Configuration Service” as one of the included productsYou will receive a file with the relevant information associated with your account.
Android settings go far beyond choosing a wallpaper or turning on Wi-Fi: They affect your security, your privacy, performance, battery life, and even how your apps react to every change on the device.Taking the time to review all these settings and understand what each one does is the best investment to enjoy a more secure, private, and comfortable mobile phone for years to come, without any unpleasant surprises or surprises.
