How to Check and Manage Data Usage on iPhone

Managing data usage on iPhone is essential to avoid unexpected charges, especially if you have a limited plan or are traveling. With a few simple steps, you can easily keep your mobile data consumption under control.

Why tracking your data usage on iPhone matters

Knowing which apps use the most data — and how to track that usage — helps you stay in control and avoid unexpected charges, especially if you're on a limited plan or traveling.

Essential features like email, maps, and cloud backups rely on mobile data to function properly. A simple text message uses almost no data, but streaming high-definition video for an hour can burn through several gigabytes.

Before you start managing your mobile data, take a moment to consider the following:

• How much data do you really need?

• If you rarely reach your limit, small adjustments may be enough. But if you’re constantly running out, upgrading your plan might actually save money over time.

• Are you sharing your data plan?

• On shared plans, one person’s heavy usage — like streaming or downloading — can impact everyone else.

• Which apps do you use the most?

• Apps like messaging or navigation are essential on the go. Entertainment apps like Netflix or TikTok are best saved for when you're connected to Wi-Fi.

• Are you traveling soon?

• Roaming charges can add up fast. Start tracking and limiting your usage before you leave to avoid unexpected fees.

Once you understand your needs, check your actual data usage to see where you can make smart adjustments.

How to check data usage on iPhone

Checking data usage on your iPhone helps you manage your data effectively and avoid unexpected charges.

View data usage by app

Some apps may use more data than you expect. To check and manage your usage effectively, follow these simple steps:

• Open Settings on your phone.

• Tap Cellular or Mobile Data.

• Scroll down to view a list of apps along with the amount of data each has used.

• Use the toggle switch to enable or disable mobile data for individual apps.

Helpful tip:

• Keep mobile data on for essential apps like maps, email, and messaging.

• For non-essential apps like app stores, downloads, or video streaming, turn off mobile data and use them only on Wi-Fi to save your data allowance.

Check monthly or current-period data

To keep an eye on your data usage during the current period, follow these steps:

• Open the Settings app.

• Tap Cellular or Mobile Data.

• Scroll down to view data usage by each app.

• At the top, you’ll see the total data used since the last reset.

Keep in mind: This data reflects the current period as tracked by your device, which may not exactly match your carrier’s billing cycle. For accurate monthly usage details, check directly with your mobile provider.

Check eSIM and physical SIM usage

If you’re using both an eSIM and a physical SIM on your iPhone, you can view data usage separately for each line. iPhones support dual SIM tracking, allowing you to see exactly how much data each plan is using — which is especially useful when using an international eSIM alongside your primary SIM.

To check data usage for each SIM:

• Open Settings.

• Tap Cellular or Mobile Data.

• Go to Cellular Data Usage.

• You’ll see a breakdown of data used by each line (for example: Primary and Secondary, or based on carrier names).

Make sure you're monitoring the correct line that's being used for mobile data. This feature is particularly helpful if you're traveling and using an eSIM for roaming while keeping your main number active.

Reset data usage statistics

For more accurate tracking, it's a good idea to reset your data usage stats at the beginning of each billing cycle. This helps you see exactly how much data you've used during the current period.

To reset your data stats:

• Open the Settings app.

• Tap Cellular or Mobile Data.

• Scroll down and tap Reset Statistics.

Resetting ensures your data usage reflects only the current cycle, making it easier to stay within your plan.

How to limit cellular data usage on iPhone

If you often run out of mobile data before your billing cycle ends, try these simple tips to reduce usage and keep your data under control.

Enable Low Data Mode

Turning on Low Data Mode is an effective way to reduce mobile data usage. This feature limits background activity and prioritizes only essential tasks.

To enable it, follow these steps:

• Open the Settings app.

• Tap Cellular (or Mobile Data).

• Select Cellular Data Options.

• Toggle on Low Data Mode.

Limit background app activity

Some apps continue using data in the background—even when you're not actively using them. This includes refreshing content, syncing data, or checking for updates.

To reduce unnecessary data usage, follow these steps:

• Open the Settings app.

• Tap General.

• Select Background App Refresh.

• Turn it off to stop apps from running in the background unless you're actively using them.

Use Wi-Fi for updates and media

App updates and media downloads can consume a large amount of mobile data if left unchecked. To save data, make sure your phone only performs these tasks when connected to Wi-Fi.

Follow these steps to adjust the settings:

• Open the Settings app.

• Tap App Store.

• Turn off App Downloads over mobile data.

Using Wi-Fi for updates and large files is a simple way to avoid data overages and keep your usage under control.

Reduce video or image quality

Sending high-resolution videos and photos can quickly eat up your mobile data. To reduce usage, go into your messaging app settings and lower the quality of media before sending. This quick adjustment helps you share content while keeping data consumption under control.

How to monitor data usage with carrier tools

If you want better control over your mobile data, make use of the tools provided by your carrier—such as mobile apps, usage alerts, and customer support.

Use your carrier’s app (e.g., Verizon, AT&T)

Most carriers, like Verizon or AT&T, offer mobile apps that let you track your data usage in real time. These apps show how much data you’ve used, what’s left in your plan, and sometimes allow you to set monthly limits to avoid overages. It’s a quick and reliable way to manage your data directly from your phone.

Set data alerts and limits

To avoid surprise charges, use your carrier’s settings to create data alerts and monthly limits. You can get a notification when you've used, say, 80% of your data plan. This gives you time to cut back on usage or upgrade your plan before reaching the limit.

Contact carrier support if needed

If you need a more detailed breakdown of your data usage or notice something unusual, reach out to your carrier’s support team. Whether you call, chat online, or visit a store, they can help you review your data usage, explain your bill, and resolve any issues with your plan.

How to fix common data usage problems

If your iPhone is using more mobile data than expected, try these simple fixes to identify the issue and reduce unnecessary consumption.

Troubleshoot excessive data consumption

If your mobile data is running out faster than usual, outdated carrier settings might be to blame. These settings can interfere with how your phone manages data.

To fix this, go to Settings > General > Software Update. Keeping your software up to date can help your device use data more efficiently and prevent unnecessary consumption.

Turn off data roaming when not needed

If you’re not actively using mobile data abroad, it's best to disable data roaming. Keeping it on can lead to unexpected charges when your phone connects to foreign networks.

To turn it off, go to Settings > Cellular, then switch off Data Roaming. For specific details about roaming fees, check with your mobile carrier.

Contact Apple Support if issues persist

If you're still experiencing high data usage after trying all available tips, it's time to get help from Apple Support.

Make sure to prepare key information like:

• Your iPhone model

• iOS version

• What you've already tried

You can reach Apple Support via their website, online chat, or phone. Sharing these details upfront can speed up the troubleshooting process.

iPhone data usage: Common questions answered

Here are some of the most common questions users ask—along with clear answers to help you better understand and manage your data usage.

What does “current period” mean?

The “current period” refers to the amount of mobile data you've used since the last time you reset the usage stats. This usually aligns with your current billing cycle and helps track how much data you've consumed so far.

How do I stop apps from using data in the background?

Some apps may continue using data in the background, even when you're not actively using them. To prevent unnecessary data consumption, disable background activity for apps. This ensures that apps only use data when you open and use them directly.

Can The BitJoy help me track eSIM data more easily?

Yes. The BitJoy offers an eSIM platform that makes it easy to monitor and manage your data usage while traveling internationally. With a straightforward and friendly website, you can:

• Track remaining data for each eSIM you’ve installed

• Get alerts when you’re approaching your data limit

• Manage multiple eSIMs in one place — ideal for frequent travelers

Your BitJoy account gives you direct access to usage details without needing extra third-party apps. This makes it easier to stay in control, avoid overages, and manage mobile data smartly while abroad.

Read more:

How to Check and Manage Data Usage on iPhone

How to Save Data on iPhone: Essential Tips

Tracking and managing data usage on iPhone is simple when you use the right tools. Stay within your limits and save money by monitoring your data wisely. For easier eSIM tracking while traveling, try The BitJoy today.