What Your Smartphone Is Sharing Without You Realising

Ever sent a holiday photo to a friend without realising it might contain the exact location where it was taken?

At a time when smartphones and apps are deeply embedded in everyday life, even something as simple as a phone number can become surprisingly exposed online, which is why understanding how to make your number private has become increasingly important.

That hidden information is just one example of how smartphones share data that most people never think about. It’s not necessarily a bad thing; many of these features exist to make apps more useful. The problem is that most of us enable them without understanding what they’re doing. By the end of this article, you’ll know exactly what your phone may be sharing, why it happens, and how to take back control with a few simple settings.

The App Permissions You Clicked Through Without Reading

Let’s start with the most obvious source of data sharing: app permissions.

Every time you install an app, it may ask for access to different parts of your device. Most people tap “Allow” without giving it much thought. After all, who wants to read through permission requests when they’re trying to use a new app?

Current versions of iOS and Android allow apps to request access to:

Contacts
Location
Microphone
Camera
Photos and videos
Calendar
Bluetooth and nearby devices
Phone and SMS functions (Android)

Some permissions make perfect sense. A camera app needs access to your camera. A navigation app needs your location.

Others are less obvious.

Take contacts, for example. When you grant contact access, an app can potentially view every contact stored on your device, including names, phone numbers, email addresses, and other information you’ve saved. Many people assume the app only gains access to their own number, but that’s not how it works.

Location permissions can be even more revealing.

Both Apple and Google allow apps to request access to your location while you’re using the app. Some apps may also request continuous or background access. Combined with background app activity, this can allow an app to build a picture of where you go throughout the day.

Think about how many apps on your phone actually need that level of access.

A simple audit can be eye-opening.

On iPhone:

Settings → Privacy & Security

On Android:

Settings → Security & Privacy → Permission Manager

Spend a few minutes checking which apps have access to your microphone, camera, contacts, and location. You’ll probably find at least one permission that no longer makes sense.

And honestly, has anyone ever carefully read every permission request before tapping Allow?

Your Photos Are Telling People More Than You Think

Most people see a photo as just an image.

Your phone sees much more.

Every photo taken on a smartphone usually contains something called EXIF metadata. This is hidden information stored inside the image file itself.

Depending on your settings, EXIF data may include:

GPS coordinates
Date and time
Device model
Camera settings
Image dimensions
Lens information

This information is useful for organising photos and improving photography. However, it can also reveal more than you intended.

Imagine taking a photo in your living room and sharing the original image file with someone online. If location services were enabled when the picture was taken, the metadata could potentially contain the exact location of your home.

The good news is that many major social media platforms remove most EXIF metadata when images are uploaded. Instagram, Facebook, and X generally strip location metadata from publicly posted images.

However, that protection doesn’t always apply elsewhere.

Original files sent through email, cloud storage links, direct downloads, or certain messaging platforms may still contain metadata. That’s why privacy experts often recommend checking before sharing original image files.

Removing location information is easier than many people think.

On iPhone

Open Photos
Select the image
Tap the information button
Choose Remove Location

On Android

Open Google Photos
Select the image
View photo details
Edit or remove location information if available

This small step can prevent accidental location sharing, especially for photos taken at home, work, or other frequently visited places.

For many people, EXIF metadata is one of the most surprising privacy features hidden inside their phone.

Your Phone Number Is More Searchable Than You’d Expect

Most people think of a phone number as private information.

In reality, phone numbers often become connected to dozens of databases over time.

This usually happens through:

App registrations
Online shopping accounts
Loyalty programs
Social media accounts
Business registrations
Contact uploads from friends and family
Public records

Once a phone number appears in multiple databases, it can sometimes show up on people-search websites or reverse lookup services.

Search results may include:

Names
Previous addresses
Social media profiles
Carrier information
Business listings

This is one reason modern scams have become so convincing.

A fraudster doesn’t need to know everything about you. If they already know your name, approximate location, or employer, their messages become much more believable.

In the UK, privacy protections under GDPR provide stronger safeguards than in many countries. However, publicly available information and third-party databases can still create surprisingly detailed profiles.

Location Data – What’s Being Collected and By Whom?

Location data is one of the most valuable forms of information collected by smartphones.

Modern devices usually offer two different levels of location access:

Precise location
Approximate location

Precise location can identify your exact position. Approximate location provides a broader area rather than a pinpoint location.

Many apps don’t actually need precise access.

For example:

Weather apps
News apps
Shopping apps
Restaurant recommendation apps

In many cases, an approximate location works perfectly well.

Yet millions of users grant precise location access automatically because it’s the default option presented during setup.

Advertising companies have long used aggregated location information to better understand consumer behaviour. This data can be used to deliver more relevant advertisements, measure foot traffic, and analyse audience trends.

The UK’s Information Commissioner’s Office (ICO) considers location data personal information because it can reveal patterns about a person’s daily life, habits, and movements.

Here’s a simple question:

How many apps on your phone genuinely need to know where you are every minute of the day?

For most people, the answer is probably very few.

Review Your Location Settings

iPhone

Settings – Privacy & Security – Location Services

Android

Settings – Location – App Permissions

Pay special attention to apps with:

Always allow permissions
Background location access
Precise location enabled

If an app doesn’t genuinely need those features, consider turning them off.

The Quick Audit Your Phone Has Been Waiting For

You don’t need to become a privacy expert.

You don’t need to delete every app.

You just need five minutes.

Quick Privacy Checklist

Review app permissions and remove unnecessary access.
Check location settings and disable “Always” access where possible.
Remove EXIF location data before sharing original photos.
Search your phone number online and see what information is publicly visible.
Review the microphone, camera, contacts, and photo permissions.
Delete apps you no longer use.

One Extra Tip for UK Users

Many UK mobile providers and online platforms allow users to manage advertising preferences and personalised marketing settings through account dashboards.

It’s worth checking these settings periodically. Reducing marketing permissions won’t eliminate all data collection, but it can reduce the amount of information used for profiling and targeted advertising.

A quick privacy review can help you understand what’s being shared, why it’s being shared, and whether you’re comfortable with it. And that’s really what privacy comes down to: making informed choices about your own information.