Last year, the Federal Communications Commission implemented a new industry standard automatic alert system. This is designed to help customers understand their plans so they don't rack up huge charges.
The new program won't arrive until later this year, though. What can you do to better track your plan in the meantime? Sign up with your provider to receive overage alerts.
To check your voice minutes, simply dial *MIN# (*646#). For, data, dial *DATA# (*3282#). Both services send you a free text with your data usage. They're a little long to remember, so you might want to save them as contacts in your phone.
AT&T will usually send an alert when you reach 65 or 90 percent of your limit. It doesn't interrupt apps if you're using one, so you might miss it if you're playing a game or watching YouTube.