Review: LG DoublePlay for T-Mobile
The secondary display does not run full applications as the main screen does. Instead, it can run up to eight, feature-limited versions of full applications. Some of the apps that run on the second display aren't really apps at all, but simple controls for apps being used on the main screen. For the apps that can stand on their own, they can be used while the main screen is left alone, running another app. In other words, you can use two apps at the same time.
The controls for the second display are separate from those of the main display. If you hit the back button on the main display, you don't go back on the second display and vice versa. You can, however, send the app running in the small screen up to the big screen if you need more space. There's a little arrow in the top-left corner of the small display that lets you do that. If you want to go back to the home screen of the secondary display, there's a little home bottom in the top-right corner to do that. There's also a "back" button that shows up every so often to let you go back one screen depending on what you're doing.
The secondary display on the DoublePlay offers its own little menu set-up. It holds a total of eight user-configurable applications. The applications that are pre-set on the DoublePlay include messaging, group text, music, photo, browser, and email, but you can delete and/or rearrange these and add what you want from a pre-determined set of compatible apps.
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That's pretty much it for the menus of this little display. Each application runs somewhat differently on this secondary display than on the main display, and I'll touch on them in each individual section of the review.