You may see an ad icon at the top of the screen in the notification bar. Pulling down the notification bar and touching the ad will typically open a web site or app. These icons and ads are push ads that installed on your phone along with one of your non T-Mobile apps. The ads will typically continue as long as you have the app installed.
If you need help performing any step, check the how-to guides for your device on the Phones page.
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