We pull usage data from the network every four hours for most accounts. It is at 15-minute increments if you routinely use more data. You may not be able to view usage info for the first day of a new bill period until later on in the day. Usage display shows time in terms of GMT (Greenwich Mean Time) time zone, which is behind U.S. time zones.Good to know:
Trained and specialized AT&T lab engineers check the accuracy of our system on a regular basis.
Data measurement and samples
A gigabyte shows how much data you send and receive over the network. It’s not how long you spend on the internet. A gigabyte (GB) is 1,073,741,824 bytes, 1,048,576 kilobytes (KB), or 1,024 megabytes (MB).
Fifty thousand emails with no file attached is about 1GB. The same goes for watching an 80-minute movie in standard definition (SD). Watching 20 minutes of a movie in high definition (HD) also equals about 1GB.
|Usage Comparisons for All Data Allowances or Internet Speed Plans|
|Web browsing||10,000+ pages||10,000+ pages||10,000+ pages|
|Email||10,000+ emails||10,000+ emails||10,000+ emails|
|Social media||10,000+ image downloads/uploads||10,000+ image downloads/uploads||10,000+ image downloads/uploads|
|Music||1,000+ MP3 song downloads||1,000+ MP3 song downloads||1,000+ MP3 song downloads|
|YouTube||1,000+ standard videos||1,000+ standard videos||1,000+ standard videos|
|TV & movies||75 hours SD TV and 90 SD or 25 HD movies||75 hours SD TV and 100 SD or 35 HD movies||400 hours SD TV and 720 SD or 200 HD movies|
The types of activities you do affect your usage more than the time you spend online. For example, data-rich activities like streaming video may use more data than sending emails.