In order to change your wallpaper in any Android device, you will need to follow the steps below:1.
Tap About Phone4.
Tap Developer Options5.
Tap Build number6.
Tap System Settings7.
Tap Display settings8.
Tap Turn on your display9.
Tap Network settings12.
Tap the phone’s Wi-Fi network14.
Tap Software update15.
Tap Allow software updates16.
Tap Check for updates17.
Tap Update now18.
Tap Restart your device21.
Tap Battery charge22.
Tap and hold the volume down button until the phone starts showing a message.23.
Tap Yes to accept the message24.
Tap Cancel when done26.
Tap Back to normal screen to finish.
You can change the system wallpaper in Settings and then tap the Change the wallpaper icon in the notification bar.
To switch between the Android 4.2.2 and 4.4.2 version of the phone, open Settings and tap About phone.
Tap the About phone button in the upper left corner of the screen.
Tap on the system notification bar icon and select Settings.
Tap on the Android Version number.
If the Android version you have is older than 4.3.2, you may need to install an update.
Tap Upgrade to upgrade.
Tap Yes to the confirmation popup.
When the system updates are complete, your phone will start showing a notification when you select it in the system menu.
Tap Install update to install the latest update on your device.