How can i erase my chat history in nokia 100?plz help me

I want to kepad unlock code my mobile NOKIA 100..??
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Help me plz....

Go to options/more/Send chat by post, and send a email to yourself.
Then print de email.

Salutations
Manuel

Many instant message programs are set, by default, to save your chat history.
This might not be a desirable feature for people who share a computer with others since it could pose a security threat.
Delete the folder in which the history is saved or delete the chat history within the instant message program.
Popular instant messenger programs, such as Yahoo!, Windows Live and Skype, simplify the process of clearing message archives.

Delete archived messages in Yahoo! Messenger.
Open Yahoo! Messenger.
Click on "Messenger" on the toolbar and select "Preferences."
Click "Clear Archive Now" to delete your chat.
Clear chat history in Windows Live Messenger.
Open the program and click the first icon from the right at the top of the box.
This is the "Show Menu" icon. Highlight "File" and click "View Message History."
Select a contact from your list to view messages from or to that contact.
Click "OK."
Click "Delete History" at the top of the "Message History" window.


Erase your conversation history in Skype.
Launch the program and click on "Privacy Settings."
Click the "Clear History" button under the "Keep History For" section.
This will delete all saved conversations.

Clean the message archives in Google Talk.
Click "Settings" on the toolbar and select "Chat" from the list of options.
Click the "Don't Save" option and click "OK."

Delete all message archives with an application.
Programs such as Cyber Scrub, WinClear and ParetoLogic Privacy Controls will delete the history from any instant messaging program, as well as tracking data from your Internet activity. Many of these programs are available for download.
Yahoo
http://help.yahoo.com/l/us/yahoo/messenger/web/web1/history/mstawdelarch.html
http://www.cyberscrub.com/topics/clean_delete_erase_chat_history.php
http://www.winclear.com/

nokia 100 insert sim card pls help me..........

With facebook chat you only see people who are currently online and using the facebook chat or using BlackBerry

nimbuzz-chat

Facebook Chat history is only stored by Facebook.com for a limited amount of time. You will be unable to access Facebook Chat history after this time.
The solution is to use a Facebook Chat Messenger that stores Facebook Chat History on your computer.

erase ur phone memory & msg also 100% ok plz give thanx

will the only thing u can do about this is delete your file and start all over.wich include new nickname and a new password

(I changed my opinion of the best method for doing this in the middle of my post - read to the very end).

Open Yahoo Messenger (I am assuming you are using Version 9 (Beta). Click on the Contacts tab and go to Message archive. This will pull up all conversations, incl deleted offline messages from pornbots, etc. Right click each folder under the main "Messages" folder and delete them one by one. I tried deleting them in bulk, but this feature doesn't seen to be enabled yet - I would tell Yahoo that they need to improve on this feature when they finalize version 9.

Oops! correction: they did enable this feature (see below)
My method:
Open Yahoo Messenger. Click the "Messenger" tab. go to Preferences. Click on Archive. Click on "No, do not save any of my messages". Then click, "Clear archive now".

Yahoo's suggested method:
To turn off archiving of your instant messages:
1. Click History in the top-right part of the page.
2. Click Options in the upper right of the My History window.
3. Un-check “Enable Message History” in the dialog.
4. Click Done.

-Tha Mp3 Doctor