48Updating your phone’s operating systemClosing an applicationTo close an active application, go to settings > Applications > Manageapplications. Tap the running tab, then tap the program you wish to close.Select Force stop to close the program.Uninstalling an applicationYou can remove programs installed on your smartphone to free up extrastorage memory. Tap and hold a program icon from the applications menu anddrag it into the trash can on the bottom left hand corner.Alternatively, you can go to Settings from the Application menu and selectApplications > Manage applications. Tap the application you wish to uninstall,tap Uninstall and confirm the uninstall.Here you can allow programs from Unknown sources to be installed andManage applications.Warning! You should only remove programs if you are familiar with the Androidoperating system.Updating your phone’s operating systemYour phone is able to retrieve system updates via wireless connections, allowingyou to upgrade the firmware without needing a PC. To check for updates, orenable automatic updates, tap Menu > Update Notification.Reset to factory defaults (clean boot)A clean boot will restore your smartphone to the factory settings.Warning! You should only perform a clean boot when all other options have failed torestore your smartphone to an operational state.Warning! This will erase all your personal information, any contacts stored on yourphone and any programs you installed.If your phone is responding to screen inputOpen Settings from the application menu, then tap Privacy > Factory data reset;click Reset phone and then Erase everything to format your phone.If your phone is not responding to screen inputTurn off your phone, then press and hold the power and volume down buttonsuntil you feel your smartphone vibrate and/or you see the Acer logo screen,then release the buttons and wait for the phone to boot.