Nokia X3-00 support

No, you can't. Series 40 devices run on java-based application with .jar file extension.

Select Menu > Settings > Display (or Main display) > Font size.

You can activate call divert to voice mailbox so that the caller can leave messages to your voice mailbox when you are not available.

To activate call divert, select Menu > Settings > Call > Call divert, (for dual SIM devices, select the SIM card to use), and select If not available or If out of reach > Activate > To voice mailbox and enter the voice mailbox number which you get from your service provider.

Select Menu > Settings > Call > Voice clarity > Active, then make a new call.

Select Menu > Settings > Call > Call divert (or Call forwarding). For dual SIM devices, select the SIM card to use if prompted. And then choose Divert all voice calls (or All voice calls) or do so in certain situations. Then enter your voice mailbox number which you get from your service provider. 

The light effects are normally associated with incoming calls, missed call notifications and received SMS messages. The light effects may vary between your Nokia device and another Nokia device.

To turn on or off the light effects, select Menu > Settings > Lights > Light effects.

Select Menu > Contacts > Settings and from the following options:

• Memory in use - to select the SIM card or phone memory for your contacts. Select "Phone and SIM" to recall names and number from both memories. In that case, when you save names and numbers, they are saved in the phone memory.
• Contacts view - to select how the names and numbers in Contacts are displayed
• Name display - to select whether the contact's first or last name is displayed first
• Font size - to set the font size for the list of contacts
• Memory status - to view the free and used memory capacity

When using predictive text input, if a question mark (?) is shown after the word you entered, the word you intended to write is not in the dictionary. To add the word to the dictionary, select Spell, enter the word and save it.

Note: You cannot manually delete words that were added to your dictionary. When the dictionary is full, the most recent addition replaces the first.

When the fixed dialling is on, SMS sending works only to the numbers saved in the fixed dialling number list. In addition, the SMSC (Short Message Service Center) number should be added to fixed dialing list and it is the same as in the message settings.

Select  Menu > Settings > Display > Screen saver (or Wallpaper) > Slide set. 
 

Select Menu > Settings > Display > Notification details > Show or Hide.

Notification details display details in missed call and message notification.

The voice mailbox is a network service to which you may need to subscribe. For more information, contact your service provider.

Select Menu > Messaging > Voice messages > Listen to voice msgs. You also have a speed dial access to your voice mailbox, press and hold the 1. To enter, search for, or edit your voice mailbox number, select Voice mailbox no..
 

The pictures cannot  be deleted directly after capturing, because of the photo is being postprocessed after shooting. After waiting for a while, the option to delete is available in the  options image editing.

Names and numbers are saved in the used memory.

To save a name and phone number, select Menu > Contacts > Add new.
 

The backlight timeout cannot be adjusted on your Nokia device.

Select Menu > Contacts > Names.

Scroll through the list of contacts, or enter the first characters of the name you are searching for.
 

 This is a phone feature, designed for your safety. When selected ringing tone volume is very high, phone will automatically play first seconds of ringing tone at a lower level. This is to avoid acoustic shock in case you have the phone close to your ears when it starts ringing.

Select Menu > Organizer or > Calendar > Options > Settings > Calendar tone.

The home screen displays a list of selected features and information that you can directly access.

Select  Menu > Settings > Display > Home screen.

If you forget or lose the lock code or security code, try first the default lock code 12345. If it is not accepted, contact the nearest Nokia Care point to unlock your device. To find nearest location to you, go to your local Nokia website, and navigate to Support > Contact us.