Today we take our mobile phones everywhere and use them for almost everything, but we rarely stop to think about what exactly are apps doing with our data?Every time you install an app on Android, you accept a series of permissions that can open the door to your camera, microphone, location, SMS, contacts, and much more.
The problem arises when we hastily click "Allow" without pausing to read. This widespread habit can end up... personal data leaksbanking malware or apps that spy on you in the backgroundThe good news is that Android offers many tools to review, limit, and control these permissions if you know where to look.
The problem arises when we hastily click "Allow" without pausing to read. This widespread habit can end up... leaks of personal information, banking malware, or apps that spy on you in the backgroundThe good news is that Android offers many tools to review permissionsLimit and control those permissions if you know where to touch.
What are permissions in Android and why do they matter so much?
On Android, permissions are Explicit authorizations that an application needs to access sensitive device functions or dataWithout that permission, the app cannot access your contacts, use the camera, read your SMS messages, or record your exact location.
When you install or open an app for the first time that needs something sensitive, the system displays a pop-up box asking for permission. You can accept, deny, or, in modern versions, allow only while you are using the application.If you deny the permission, that specific part of the app will not work (for example, you will not be able to take photos with a camera app).
Android classifies permissions into two main groups: on the one hand, the so-called "Normal" permits, which pose hardly any risk (such as internet access or vibration), and on the other hand the “Dangerous” permissions that do affect privacy and security (camera, microphone, SMS, contacts, location, etc.). These last ones are the ones that need to be monitored very closely.
Furthermore, since Android 6 and especially in recent versions, the system uses a more granular model. That means You can grant a permission only when the app is in use, revoke it later, or even make it expire only if you stop using the app for months.All of this is designed to give you more control… as long as you take advantage of it.
Types of Android permissions and what each one allows
When you check the permissions in Settings, you'll see a list of categories that you can open to view what specific data does your mobile phone give to each applicationThese are the most common ones and what they really mean:
Calendar: It allows apps to view, create, modify, or delete your events. A calendar app or a social network might need this to add appointments, but a flashlight app has no justification for requesting it.
Contacts: It gives full access to the phone's contact list and often to associated accounts (e.g., social media). A messaging app uses it to show you who's available, but An irrelevant app that wants to read your contacts is a clear source of risk..
Call logs and telephone: It allows you to read and write call history, see who is calling you, make and manage calls, forward numbers, etc. It is a very sensitive permission because It exposes your phone activity and can generate unwanted calls, even to premium-rate numbers..
SMS: It authorizes the reading, receiving, and sending of text messages, as well as MMS or WAP push messages. If a malicious app intercepts it, It can intercept verification codes, subscribe you to premium services, or launch spam campaigns from your number..
Camera: It offers direct access for taking photos and recording video. It's necessary for photography apps, video calls, or document scanners, but In the hands of malware, it can activate the camera without you even noticing..
Microphone: It allows audio recording. It is used in video calling apps, voice notes, virtual assistants, and music recognition, although It can also be used for covert wiretapping if it is granted to the wrong person..
Location: It provides access to your approximate (WiFi and antennas) or precise (GPS) location. It's vital for maps, transportation, and weather forecasting, but also It can map all your daily routines and know where you live, work, or what places you usually go.
Files / Storage / Photos and videos / Music and audio: It allows reading and writing to internal memory or SD card, as well as accessing photos, videos, or audio. This is logical in gallery apps, editors, or players, but It gives a huge window into your private life if the app is not trustworthy..
Nearby devices: It's used to search for, connect to, and locate nearby devices (Bluetooth, accessories, etc.). Very useful for headphones, watches, or fitness trackers, although It's best to limit it to apps that really need it..
Notifications: This authorizes the app to read the content of system notifications. With this authorization, an app can see what messages you receive, including verification codes, bank notifications, or private information from other applications.
Physical activity / Body sensors: It offers access to data such as steps, heart rate, and sports activity. It's usually essential for health apps, but It can also be used to create a very detailed profile of your habits.
The three key permissions of malware (and a very dangerous extra guest)
Android has many sensitive permissions, but experience with malware and scams shows that There are three that stand out above the rest: accessibility, SMS reading, and access to notifications.In addition to these, there is an "extra" permission that, when used correctly, also gives attackers a lot of leeway: app overlay.
Accessibility permission
The accessibility service was originally designed to make mobile phones easier to use for people with visual, motor, or similar disabilities. However, This permission allows an app to observe what you do, press buttons for you, read the screen content, and automate actions on your behalf..
Google has been tightening the rules for these types of services over the years, but it's still a huge gateway. If any application asks for accessibility access without a very clear reason, be suspicious.Many malware families use it precisely to silently take control of the device.
Access to notifications
The notification access permission allows an app Read, manage, and in some cases interact with the notifications that appear in your status bar.That includes messages from banks, one-time codes, email notifications, and pretty much anything else you receive.
Banking Trojans and other modern malware abuse this permission to Capture two-step verification (2FA) codes and complete them in the backgroundWhile you're viewing an SMS or a notification from your bank, the malicious app has already copied the code and is pasting it into a hidden form.
SMS Reading
SMS access serves a similar purpose to notification permission, but directly targets text messages. Since many banks and services still send codes via SMS, an app that can read them has free rein to authorize transactions without you noticing..
Aware of the problem, Google created specific APIs to limit which apps can request this permission, so that only SMS apps or very specific verification services can use it. Even so, Abuses of this type are still seen on older mobile phones or apps installed outside of Google Play..
App overlay (display over other apps)
Overlay allows an app to place a floating window on top of any other application. This is what they use, for example, chat bubbles, floating icons, or accessibility toolsSo far, so good.
The problem arises when a malicious application uses that overlay to place a transparent layer over the keyboard or sensitive formsThis allows them to record what you type, steal passwords, or trick you into clicking fake buttons ("clickjacking"). That's why it's a good idea to check which apps have permission to "display over other apps."
How to review and change the permissions of a specific app
Android lets you control, quite easily, what can each app installed on your mobile phone do?The menu names change slightly depending on the brand and version, but the general navigation is usually very similar:
- Open the app Settings of the telephone.
- Sign in Applications or in Applications and notifications.
- Find and tap the app you want to check. If you don't see it, tap See all applications or a similar option.
- Within the app's details, go to Permissions.
- You will see the permissions granted and those denied. Tap each one to switch between Allow, Do Not Allow, or the available advanced options (only while using the app, always ask, etc.).
With particularly sensitive permissions such as location, camera or microphoneAndroid offers some very interesting nuances:
- Allow all the time: It's usually only available for location tracking. The app can know where you are even when you're not using it.
- Allow only while using the app: the most recommended option for most cases; The app only accesses the permission when it is in the foreground..
- Always ask: Each time you open the app, you will have to approve the permission again.
- Do not allow: The app cannot use that permission at any time.
Keep in mind that if you disable a key permission, Part of the app may stop working (For example, a GPS navigator without location services or a camera app without camera access). If something breaks, you can always go back to Settings and reactivate it.
How to see which apps use the same type of permission
In addition to reviewing app by app, Android incorporates a A permissions manager that lets you see all the applications that access the same resource.It's very convenient for detecting surprises, such as games that use your location or unknown apps with access to SMS.
To view it on most current mobile phones:
- Opens Settings on your Android.
- Go to Security and privacy or directly to Privacy , according to your version.
- Sign in Permissions manager or in Privacy Dashboard and then in Manager.
- Choose a specific permission (for example, Location, SMS, Notifications, Camera…).
- You will see the list of apps that have access, separated by level (Always allowed, only while in use, denied). Tap an app to change its settings.
This panel is especially useful for reviewing SMS, notifications, accessibility and “Show over other apps”If you see something that doesn't fit with the app's function, revoke the permission without hesitation. If it really needs it later, the system will request it again.
App privacy and recent activity panel
In Android 12 and 13, Google added a Privacy dashboard showing which apps have used sensitive permissions in the last few hours or daysIt's a quick way to see if any tool is overstepping its bounds.
To consult it:
- Opens Settings on your mobile.
- Toca Security and privacy o Privacy .
- Sign in Privacy Dashboard.
- Select a permission (Location, Camera, Microphone, etc.) to view Which apps have used it in the last 24 hours (Android 12) or 7 days (Android 13).
- If you see something unusual, tap the app in the list and adjust or revoke the permission.
Furthermore, since Android 12, the following are shown Visual indicators when an app uses the camera or microphone (small green dots in the status bar), and there are global switches to block all camera and microphone access from Settings > Security and privacy > Privacy controls.
Automatic permissions and cleaning up apps you don't use
Another very interesting feature of recent Android versions is the ability to Automatically revoke permissions for apps you haven't opened in a while.This way, if you installed something months ago and forgot about it, it won't have access to your data forever.
To check it in a specific app:
- Sign in Settings> Applications.
- Select the application you want.
- Look for the style option “Pause application activity when not in use” or “Remove permissions if the app is not used.”
- Activate it so that Android Automatically cut off permissions and background activity after a few months of inactivity..
In addition to this, it's a good idea to do regular cleaning: If you don't know what an app is for or haven't used it in ages, just uninstall it.The fewer apps installed, the smaller the attack surface.
Administrator permissions, root permissions, and other special access privileges
In addition to "normal" and "dangerous" permissions, Android has a category of special accesses that grant a very high level of control over the deviceThese are especially delicate:
Device administrator privileges: They allow an app to change the password, lock the phone, erase all data, or make it difficult to uninstall. Some security or business management apps use them legitimately, but It is enormous power in the wrong hands.
Various special access points: Within Settings > Applications > Special access (or similar names) you will find permissions such as “Install unknown apps“Show over other apps”, “Optimize battery”, “Modify system settings”… It’s worth it Review these sections carefully and limit access to only what is strictly necessary..
How to detect suspicious apps through their permissions
Even without being a security expert, you can detect many suspicious applications simply by looking at What permits are they requesting and what do they want them for?Some very clear clues:
- An app requests a permission that has nothing to do with its function (a flashlight app that wants contacts and SMS, for example).
- It requires many "dangerous" permits for something that should be simple.
- It starts asking for new permissions after an update without explaining why.
- It repeatedly insists if you deny it access, even blocking functions that don't need it.
If you're unsure, you can do three very simple things: Read reviews on Google Play, check the "Data Security" section of the app's listing, and see what permissions it uses.Google requires developers to declare what data they collect and how they process it, which gives you an extra clue.
And if something still doesn't seem right, the wisest thing to do is look for an alternative or simply uninstallOn Android, there are usually several apps for almost any task.
The relationship between permissions, malware, and scams on Android
A very common pattern is the following: you download a seemingly normal app (games, tools, trending apps, even APKs outside of Google Play) and when you open it It asks for accessibility, SMS reading, notifications, or device management.If you accept without thinking, the malware can:
- Read your SMS messages and notifications to capture verification codes.
- Overlaying fake screens on your online banking and stealing credentials.
- Subscribing to premium services or making payments without your authorization.
- Record everything you type and send it to a remote server.
Google Play Protect and the store's review systems detect and remove many of these apps, but If you download from outside the Play Store or carelessly grant excessive permissions, the risk increases significantly.That's why your judgment when managing permissions is such an important part of your security.
To further enhance protection, it is recommended to use a security app from a recognized provider that analyzes applications, monitors for suspicious behavior and alerts you if something seems wrong, as well as centrally reviewing your permissions.
With all of the above, it is clear that the permissions system is one of the biggest security barriers in Android, but also one of the easiest to bypass if the user grants access blindly. Reviewing what each app requests, limiting access only when necessary, and using the system's privacy tools makes the difference between a relatively secure mobile phone and a device full of open doors for anyone who wants to abuse them..
