Cognitive-behavioral therapy is an action-oriented form of psychosocial therapy that assumes that maladaptive, or faulty, thinking patterns cause maladaptive behavior and negative emotions. (Maladaptive behavior is behavior that is counter-productive or interferes with everyday living.)
The quickest way to check your usage is by receiving a free text message about your balance, data, minutes, and text messages. T-Mobile automatically sends you an alert by text message when you've reached 80% of your minutes, texts, or data usage. Another alert is sent when you've reached 100%. Go to: 1  Check your minutes.
Manage iPhone Mobile Data Usage. The Mobile Data Usage part of Settings can be used to check how your doing for Mobile data. If you want to get a feel for how much data you're using click on Settings > Mobile > Mobile Data Usage. Scroll down and look for Mobile Data Usage.