2831. From the Home screen, press and then tap Settings ➔(More tab) ➔ Security ➔ Unknown sources check box.2. Tap OK to allow install of non-Play Store applications.Tap again to remove the check mark and disable theinstallation of non-Play Store applications.Warning! Not all web applications are safe to download. In order toprotect your phone and data, use the Play Store to installweb applications. For more information, refer to“Downloading a New Google Application” on page 247.PC ConnectionsYou can connect your device to a PC using an optional PC data cableusing various USB connection modes.Media device (MTP): allows you to transfer media files in Windows, orusing an Android file transfer on a Mac.Camera (PTP): allows you to transfer photos using the camerasoftware, and transfer any files onto a PC that does not support MTP.Note: To sync your device to your computer it is highly recommendedthat you install Samsung Kies which is available at http://www.samsung.com/kies (for Windows/Mac).Note: If you are a Windows XP user, ensure that you have Windows XPService Pack 3 or higher installed on your computer. Also,ensure that you have Samsung Kies 2.0 or Windows MediaPlayer 10 or higher installed on your computer.