I have forgot my old ID and password for my yahoo account on my blackberry. How can I get that information easily? Or can I just set up another yahoo account?

If you forget your Yahoo password:

click this link : https://edit.yahoo.com/forgot ....you will be asked for an alternative email address
to which a reset link will be sent.If you don't have an alternative email you will be asked the 2 secret Q's to which you must answer"old accounts may only have 1"you will then be asked for a new password and thats it.

Also:
You can get a new password, a Yahoo! ID reminder, or both. If you forgot your Yahoo! ID or password, go to the Sign-in Problems page.
If you forgot your Yahoo! ID, you need to provide three pieces of information so we can confirm your identity:

• Your birthday
• Your ZIP or postal code (at the time you created your Yahoo! account or when you last updated it)
• Your alternate email address -Note: You must have access to this email address
• Country code (at the time you created your Yahoo! account or when you last updated it)

Be sure to provide the same information you gave the last time you registered for a new Yahoo! ID or password or the last time you updated your account.
If you forgot your password, you can create a new one. But first you'll have to provide the following information so we can confirm your identity:

• Your Yahoo! ID
• Alternate email address, mobile phone number, or the answers to your secret questions

A Reset Your Password link will be sent to your alternate email address. Click the link and enter your new password in the Reset your password page.
If you entered your secret question incorrectly or forgot what you originally entered, for security reasons, we cannot tell you what your Yahoo! ID is or let you create a new password.

If you cannot verify the answer to your Security Question, you cannot change it to something else.
We strongly suggest that you add and verify an active alternate email address or mobile phone for your account. This is an email address we can use to communicate with you if you no longer have access to your Yahoo! Mail account.

https://edit.yahoo.com/forgotroot?done=http%3A%2F%2Fmail.yahoo.com&src=ym&partner=&intl=us
Select one of the following. You will probably have to do this twice because you forgot both username and password.
What's the problem you are experiencing?
Looks like you need some help?
Let us help you find a solution.
What's the problem you are experiencing?
I forgot my password My password doesn't work
I forgot my Yahoo! ID My account may have been compromised
Answer a few questions and we'll email you your ID
We need to match all the information below with our account records to locate a Yahoo! ID.
Alternate Email Address
This is the primary alternate email address on your Yahoo! account.
Birthday
Country of Residence
Postal Code
If you don't have an alternate email address for them to email you instructions you may go to gmail.com or myway.com and create one

You can get a new password, a Yahoo! ID reminder, or both. If you forgot your Yahoo! ID or password, go to the Sign-in Problems page.

If you forgot your Yahoo! ID, you need to provide three pieces of information so we can confirm your identity:

• Your birthday
• Your ZIP or postal code (at the time you created your Yahoo! account or when you last updated it)
• Your alternate email address -Note: You must have access to this email address
• Country code (at the time you created your Yahoo! account or when you last updated it)

Be sure to provide the same information you gave the last time you registered for a new Yahoo! ID or password or the last time you updated your account.

If you forgot your password, you can create a new one. But first you'll have to provide the following information so we can confirm your identity:

• Your Yahoo! ID
• Alternate email address, mobile phone number, or the answers to your secret questions

A Reset Your Password link will be sent to your alternate email address. Click the link and enter your new password in the Reset your password page.

If you entered your secret question incorrectly or forgot what you originally entered, for security reasons, we cannot tell you what your Yahoo! ID is or let you create a new password.

more info here http://help.yahoo.com/l/us/yahoo/edit/id_password/edit-20.html

If you forget your Yahoo password:

click this link : https://edit.yahoo.com/forgot ....you will be asked for an alternative email address
to which a reset link will be sent.If you don't have an alternative email you will be asked the 2 secret Q's to which you must answer"old accounts may only have 1"you will then be asked for a new password and thats it.

Also:
You can get a new password, a Yahoo! ID reminder, or both. If you forgot your Yahoo! ID or password, go to the Sign-in Problems page.
If you forgot your Yahoo! ID, you need to provide three pieces of information so we can confirm your identity:

• Your birthday
• Your ZIP or postal code (at the time you created your Yahoo! account or when you last updated it)
• Your alternate email address -Note: You must have access to this email address
• Country code (at the time you created your Yahoo! account or when you last updated it)

Be sure to provide the same information you gave the last time you registered for a new Yahoo! ID or password or the last time you updated your account.
If you forgot your password, you can create a new one. But first you'll have to provide the following information so we can confirm your identity:

• Your Yahoo! ID
• Alternate email address, mobile phone number, or the answers to your secret questions

A Reset Your Password link will be sent to your alternate email address. Click the link and enter your new password in the Reset your password page.
If you entered your secret question incorrectly or forgot what you originally entered, for security reasons, we cannot tell you what your Yahoo! ID is or let you create a new password.

If you cannot verify the answer to your Security Question, you cannot change it to something else.
We strongly suggest that you add and verify an active alternate email address or mobile phone for your account. This is an email address we can use to communicate with you if you no longer have access to your Yahoo! Mail account.

You can get a new password, a Yahoo! ID reminder, or both. If you forgot your Yahoo! ID or password, go to the Sign-in Problems page.
If you forgot your Yahoo! ID, you need to provide three pieces of information so we can confirm your identity:

• Your birthday
• Your ZIP or postal code (at the time you created your Yahoo! account or when you last updated it)
• Your alternate email address -Note: You must have access to this email address
• Country code (at the time you created your Yahoo! account or when you last updated it)

Be sure to provide the same information you gave the last time you registered for a new Yahoo! ID or password or the last time you updated your account.
If you forgot your password, you can create a new one. But first you'll have to provide the following information so we can confirm your identity:

• Your Yahoo! ID
• Alternate email address, mobile phone number, or the answers to your secret questions

A Reset Your Password link will be sent to your alternate email address. Click the link and enter your new password in the Reset your password page.
If you entered your secret question incorrectly or forgot what you originally entered, for security reasons, we cannot tell you what your Yahoo! ID is or let you create a new password.

You can get a new password, a Yahoo! ID reminder, or both. If you forgot your Yahoo! ID or password, go to the Sign-in Problems page.
If you forgot your Yahoo! ID, you need to provide three pieces of information so we can confirm your identity:

• Your birthday
• Your ZIP or postal code (at the time you created your Yahoo! account or when you last updated it)
• Your alternate email address -Note: You must have access to this email address
• Country code (at the time you created your Yahoo! account or when you last updated it)

Be sure to provide the same information you gave the last time you registered for a new Yahoo! ID or password or the last time you updated your account.
If you forgot your password, you can create a new one. But first you'll have to provide the following information so we can confirm your identity:

• Your Yahoo! ID
• Alternate email address, mobile phone number, or the answers to your secret questions

A Reset Your Password link will be sent to your alternate email address. Click the link and enter your new password in the Reset your password page.
If you entered your secret question incorrectly or forgot what you originally entered, for security reasons, we cannot tell you what your Yahoo! ID is or let you create a new password.

How to Recover Yahoo Account Password

please follow stpes to resolved your issue

You can get a new password, a Yahoo! ID reminder, or both. If you forgot your Yahoo! ID or password, go to the Sign-in Problems page.
If you forgot your Yahoo! ID, you need to provide three pieces of information so we can confirm your identity:

• Your birthday
• Your ZIP or postal code (at the time you created your Yahoo! account or when you last updated it)
• Country code (at the time you created your Yahoo! account or when you last updated it)

Be sure to provide the same information you gave the last time you registered for a new Yahoo! ID or password or the last time you updated your account.
If you forgot your password, you can create a new one. But first you’ll have to provide the following information so we can confirm your identity:

• Your Yahoo! ID
• Alternate email address, mobile phone number, or the answers to your secret questions

A Reset Your Password link will be sent to your alternate email address. Click the link and enter your new password in the Reset your password page.
If you entered your secret question incorrectly or forgot what you originally entered, for security reasons, we cannot tell you what your Yahoo! ID is or let you create a new password.

regards
manish

Click the "Forget your ID or password" link at the lower right of your screen, it will help you retrieve your password for sure. And you can have your email address back...as long as you have the information needed to verify your account, one of it is the the answer to your secret question...good luck!