Data Usage Information & FAQs from AT&T
Info for Smartphone Customers with Legacy Unlimited Data Plans

Do you have an unlimited data plan? If so, we have information to help you manage your account.


As a result of the AT&T network management process, customers on a 3G or 4G smartphone with an unlimited data plan who have exceeded 3 gigabytes of data in a billing period may experience reduced speeds when using data services at times and in areas that are experiencing network congestion. Customers on a 4G LTE smartphone will experience reduced speeds once their usage in a billing cycle exceeds 5 gigabytes of data. All such customers can still use unlimited data without incurring overage charges, and their speeds will be restored with the start of the next billing cycle.

Learn more about unlimited data plans and reduced speeds

Managing your data usage is easy. Check your data usage anytime by dialing *data# from your smartphone.

If you have one of our Mobile Share® plans or our tiered data plans, this information does not affect you.

Learn more about our Mobile Share Value plans with Unlimited Talk and Text.

What you need to know...


If you have a smartphone that works on our 3G or 4G network and still have an unlimited data plan:


  • You'll receive a text message when your usage approaches 3GB in one billing cycle.
  • The next time you exceed that usage level, your speeds may be reduced without another text message reminder.
  • Each time you exceed 3GB or more in a billing cycle, your data speeds may be reduced for the rest of that billing cycle and then go back to normal.

The same process applies for 4G LTE smartphones with unlimited data plans except your speeds will be reduced once you exceed 5GB of data usage (instead of 3GB).

You'll still be able to use as much data as you want without incurring overage charges. That won't change. Only your data throughput speed may change if you exceed 3GB in one billing cycle on a 3G or 4G smartphone or 5GB or more on a 4G LTE smartphone.

Learn more about unlimited data plans and reduced speeds

What can you do with a GB?


You can do all of this with your data... 1GB 4GB 10GB
Emails sent / received with attachments 1,000 3,600 10,400
Hours of surfing the web 29 114 286
Hours of streaming video 1 5 11
Hours of streaming music 9 34 86
Social media posts with images 140 540 1,360
Apps / games / songs downloaded 10 40 100

One Hour of Data Consumption

Streaming HD Movies
306MB
306MB
Streaming Video Clips
120MB
120MB
Streaming Audio
30MB
30MB
Email
5MB
5MB
Social Media
5MB
5MB

Explore Your Options


Use Wi-Fi

Your speeds are not reduced if you are connected via Wi-Fi. Data activity over Wi-Fi doesn't count toward the threshold at which your data speeds will be reduced.


Switch to a Mobile Share® Value Plan

With Mobile Share Value plans, your speeds are not reduced. You can switch anytime without having to sign a new two-year term agreement


Do nothing

You may continue to use an unlimited amount of data without incurring overage charges; however, your speeds may be reduced if you exceed 3GB of data on a 3G or 4G smartphone in a billing cycle, and will be reduced if you exceed 5GB of data on a 4G LTE smartphone in a billing cycle.


  • Estimate your usage with the data calculator.
  • Check usage this month by dialing *data# on your mobile phone.
  • Log in to myAT&T to check historical usage.
Our AT and T mobile phone adoption has grown 30000 percent from 7 million in 2006 to 53 million in 2014.

AT&T Smartphone Adoption


Experts agree that our country continues to face a serious wireless spectrum crunch. While access to more spectrum is critical, we are continuing to invest aggressively to meet customer demand:


AT&T invested nearly $119 billion in its wireless and wireline networks over the past six years (2008 through EOY 2013).

In 2013, we invested $21.2 billion in our wired and wireless networks.


AT&T Smart Wi-Fi App

Locate and connect to Wi-Fi hotspots. Manage connections and data usage.


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