Select Menu > Settings > Display > Screen saver (or Wallpaper) > Slide set.
Yes, your Nokia phone display will go blank while being updated or state "local / test mode", and when doing the update via Nokia Suite, your PC can display "Device disconnected". Do not disconnect your phone at this time but wait for the update to finish.
As soon as the update is completed, the phone will reboot and the phone screen should be back to normal.
Your device screen light is turned off after a certain time your device is not in use (the time varies between device models), this is designed specifically for your device to save the battery power. It is not possible to change it. But you can turn on the light easily by pressing any key.
Note: the screen saver can be turned on or off separately in Menu > Settings > Display > Screen saver, select a screen saver and the time-out. The screen saver is activated in standby mode after the defined time-out. After the time-out of the screen saver, the power saver will be automatically activated.
Nokia 2700 and 2730 phones do not have screen saver.
Check that the IMEI number printed on the label under the battery is the same as the IMEI number reported by your device.
To display the number, in the home screen, enter *#06#. If the numbers match, to check the validity of the number, contact a Nokia care point.
Select Menu > Settings > Display (or Main display) > Font size.
A typical situation for a phone call to fail is when the network is busy. This may be sometimes noticeable in areas where an unexpectedly high amount of users are occupying the network. In most cases, an error which returns from the base station indicates that the network is currently too busy to handle the call request.
Solution proposals for the connection error:
There are several ways to find the IMEI number (15 digits) of your phone, for instance:
Use the following guidelines to increase your battery life time:
Make sure your phone is running the latest software. For downloads and assistance, go to your local Nokia website's support page.
If the battery loses the power fast even though there is no features consuming the power, the battery may be wearing out and you need to replace it with a new one.
Press and hold the key 1 until your device dials to your voice mailbox number or select Menu > Messaging > Voice mail (or Voice messages, or More > Voice messages) > Listen to voice mails (or Listen to voice msgs. or Listen to voice messages). For the first time use, enter your voice mailbox number which you get from your service provider.
Note: The voice mailbox is a network service, contact your service provider for subscription. If supported by the network, the voice mail icon (the icon on the key 1) will display on the device to indicate new voice mails.
Flash messages (network service) are text messages that are instantly displayed.
Select Menu > Messaging > Create message > Flash message, or Menu > Messaging > Other messages > Flash message, or Menu > Messaging > Other messages > Flash message.
Note: Only devices that offer compatible flash message features can receive and display blinking flash messages.