A master reset is sometimes called a factory data reset or reset for short. It restores the phone to its original settings, as if it is new again. This deletes the information stored on the device. Information stored on the memory card or synchronized to a Google account is usually saved, though some devices erase the memory card. Follow these steps below to back up any data that you may lose.
If you need help performing any step, check the how-to guides for your device on the Phones page.
After the sync instructions above, you can check calendars are backed up:
Paid applications are already saved to your Google account.
If the app stored data (save games, high scores, memos, preferences, etc.) on:
There are non-T-Mobile applications on the Play Store that can back up your app data. T-Mobile does not support these applications, but you can contact the developer for help.
Android devices may save your media (pictures, photos, videos, music) on the SD card. If it is stored on the internal storage, you can move it to the SD card or a computer.
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