It makes sense after updating to the firmware Android Lollipop to perform aso-called factory reset. The factory reset will erase all data on your smartphone and install the operating system, in this case Android Lollipop, completely new. Thus, all the old and unnecessary system files from the previous operating system are completely deleted, which means that any errors can be corrected.
If you do not know how to perform a factory reset on Android lollipop, then we want to give you some step-by-step instructions here.
Before you perform the factory reset on your Android Lollipop smartphone, back up all important data, such as images, text, messages, music, etc. as these are completely deleted by the factory reset operation. Most smartphone Manufacturers supply a backup software for this procedure. Samsung, for example, provides the program "Samsung Kies" to create backups.
After you have performed the backup the factory reset on Android Lollipop can be started as follows:
Open from the home screen of your Android Lollipop smartphone the menu and then the settings. Search for the section "user and backup" and then tap on "Backup and Reset". You will proceed to the next submenu. You can now see the following button: "Factory data reset"
After you tap the button, a wizard starts that guides you through the process of returning to the factory settings in Android Lollipop. Tap in the next screen, "Reset Device" and follow the instructions on the display. The smart phone will restart after the factory reset and all new Android Lollipop files will be installed. Then you will have a freshly installed Android Lollipop system, which should not cause any further problems.
Have fun with Android Lollipop!