Check your data usage in the AT&T mobile app or online account

The fastest way to see how much data you have used is to open the AT&T mobile app on your phone and tap the account or usage section. You will see your current billing period, how much data you have used so far, and how much remains in your plan. If you do not have the app, you can log into your AT&T account at att.com, select your phone number, and find the same information under "Usage" or "My Usage".

Both methods update throughout the day, though there can be a delay of a few hours between when you actually use data and when AT&T records it. If you need to know your usage right now, the app is usually faster than the website because it refreshes more frequently.

Key Takeaways

  • The AT&T mobile app shows your data usage in real time and is the quickest way to check how much you have left in your plan.
  • You can also check usage on att.com by logging into your account and navigating to the Usage section.
  • AT&T can send you text alerts when you reach 50, 80, or 90 percent of your monthly data limit if you turn them on in your account settings.
  • Data usage updates with a delay of a few hours, so the number you see may not include the last few minutes of activity.
  • If you are on a shared data plan, each phone on the plan shows its own usage separately in the app.

Turn on data usage alerts so you do not have to check manually

AT&T can send you a text message when you reach 50, 80, or 90 percent of your monthly data limit. To set this up, open the AT&T app, go to your account settings, and look for "Notifications" or "Alerts". You can choose which thresholds trigger a message and which phone number receives it.

Once alerts are on, you will get a text without having to open the app. This is useful if you have a limited data plan or if you stream video and music often. You can turn alerts off at any time from the same settings menu.

Understand what counts as data on your AT&T plan

Data usage includes anything that connects to the internet: web browsing, email, social media, video streaming, music streaming, app updates, and map navigation. Text messages and phone calls do not use data if you are on a standard voice plan, but they do if you are using Wi-Fi calling or a data-based messaging app like WhatsApp.

Video streaming uses the most data by far. A one-hour HD video on YouTube or Netflix can use 1 to 3 gigabytes depending on the quality. Streaming music uses much less — roughly 40 to 50 megabytes per hour on Spotify or Apple Music at standard quality. Browsing websites and checking email use only a few megabytes per session.

When you are connected to Wi-Fi, none of this counts toward your monthly data limit. AT&T only counts data you use over its cellular network.

Check data usage for individual apps on your phone

If you want to know which apps are using the most data, you can see a breakdown on your phone itself without opening AT&T's app. On an iPhone, go to Settings, tap Cellular, and scroll down to see how much data each app has used since you last reset the counter. On an Android phone, go to Settings, tap Network and Internet, select Mobile Network, and tap App Data Usage.

These phone-level counters reset on a date you choose, which may not match your AT&T billing cycle. To get an accurate picture, set your phone's counter to reset on the same day your AT&T bill renews. You can find your billing date in the AT&T app under Account or Billing.

Know the difference between your plan limit and overage charges

AT&T offers plans with different data limits: some have a set amount per month, while others are unlimited. If you have a limited plan and go over, AT&T will charge you for the overage. The cost varies by plan, but overage charges typically run $10 to $15 per gigabyte.

If you are close to your limit, you have two options: buy extra data before you go over, or switch to an unlimited plan. Buying extra data is a one-time purchase that adds to your current month only. Switching plans takes effect on your next billing date. Check the AT&T app to see the cost of each option for your specific plan.

Use Wi-Fi to avoid using cellular data

Connecting to Wi-Fi at home, work, or public places like coffee shops does not count toward your monthly data limit. Your phone will automatically connect to Wi-Fi networks you have used before, but you can also manually select a network in your phone's settings.

Be cautious with public Wi-Fi networks that do not require a password, as they are less secure. For everyday use like checking email or browsing, public Wi-Fi is fine. For sensitive tasks like banking or shopping, use your home network or a password-protected network instead.

Frequently Asked Questions

Why does my AT&T app show different data usage than my phone's settings?

AT&T's count and your phone's count may not match because they reset on different dates and because there is a delay between when you use data and when AT&T records it. Your phone's counter resets on a date you set, while AT&T's counter resets on your billing date. Set your phone's counter to match your billing date for an accurate comparison.

Does tethering use data from my plan?

Yes. When you use your phone as a hotspot to connect another device to the internet, all data used by that device counts toward your AT&T plan limit. Tethering uses data quickly, especially if the other device is streaming video or downloading large files.

Can I see data usage for previous months?

Yes. In the AT&T app or on att.com, you can view your usage history for past billing periods. This is useful if you want to see whether your usage is increasing over time or to plan for a plan change.

What happens if I go over my data limit?

AT&T will charge you an overage fee, usually $10 to $15 per gigabyte, depending on your plan. You can avoid this by buying extra data before you go over or by switching to an unlimited plan. Both options are available in the AT&T app.