Software was not fully downloaded. CNET installer is misbehaving. Tried few times downloading this Nokia Software Updater 2.6.6 and it failed to complete the file of 35MB and stopped at 6.
Tap Settings About phone System updates Check for update to check if updates are available.When your phone notifies you that an update is available, just follow the instructions shown on your phone. If your phone is low on memory, you may need to move your apps, photos, and other stuff to the memory card.Warning: If you install a software update, you cannot use the device, even to make emergency calls, until the installation is completed and the device is restarted.Before starting the update, connect a charger or make sure the device battery has enough power, and connect to Wi-Fi, as the update packages may use up a lot of mobile data.
The software of Nokia phones when they are sold is not the definitive version and that's the reason why it is very recommendable to update it with the latest software version.Nokia Software Update is a lite application for Windows that will search for the latest software version for your Nokia phone.It is an easy way. You won't have to search for anything, Nokia Software Update will do everything. In fact, you'll only have to connect the phone via USB and run the program.The application will detect the phone and will check for new updates in Nokia repositories. We recommend you to update your phone, it will work better.