Online chat Application facebook messenger does not want to install it on my HTC Desire He tells me that an unknown error code during the installation of "24" What should I do?

Make sure that you are not filtering your contacts. http://www.htc.com/www/support/htc-desire-hd/howto/14185.html

I need you to know before you decide to use free HTC Desire HD unlock code in your phone. Free unlock code is not reliable and usually make your phone hardlocked so you need to fix it at mobile repair shop. I sugest you to purchase reliable htc unlock code for small price at third parties sites rather than use unknown code.

You can not remove those apps unless you root the phone and flash a new OS onto it. They are normally installed by you carrier. Please note rooting the phone will void the warranty.

When you are in Chat, tap the Menu button and then tap Go Online.
This will make you appear 'online' for chatting.

How do I put CHAT via Facebook on my HTC Desire phone

Sure. I know what you look for. The apps name is 'MSN Messenger Button'.For MSN / Windows Live Messenger users, this application lets them add an MSN Messenger Button to their Facebook profile page. It allows contacts to add users to their MSN Messenger contacts. It also lets users find out who among their Facebook friends are using MSN Messenger and allows them to be added as contacts. In addition, this application also lets users chat with MSN Messenger friends right on their Facebook profile.

Hello i hope u 'll be fine.... thanks for using fixya.

• Now u can chat with your Facebook friends by "Facebook chat Messenger". To download "Chitchat for Facebook messenger" Just Click Here
• Download it and install on your PC, After it, Just login it with your Facebook id and chat with your friends online through it,

Best of luck and enjoy
Kindly do rate if it is helpful,

THANKS & Keep using Fixya

As the import contacts tab in yahoo messenger does not have the 'facebook ' option you have to do this the round about way via yahoo mail.You have to first import the facebook contacts to the yahoo mail application ( not the chat/messenger application).This can be done by following the guide in the link below :
http://www.tothepc.com/archives/import-facebook-gmail-contacts-to-yahoo-mail/
Your yahoo mail will now have the facebook contact addresses

After you have done this you can go to Yahoo Chat Messenger Menu - Contacts - Import Contacts - 'Select the accounts below where your accounts are stored' - click on 'Yahoo mail / Address book ' - then click on continue .
This will send chat invitations to your contacts in facebook and they will get added to your messenger buddy as per permissions given by the facebook contacts.

Attached is a screenshot:

Hello i hope u 'll be fine.... thanks for using fixya.

• Now u can chat with your Facebook friends by "Facebook chat Messenger". To download "Chitchat for Facebook messenger" Just Click Here
• Download it and install on your PC, After it, Just login it with your Facebook id and chat with your friends online through it,

Best of luck and enjoy
Kindly do rate if it is helpful,

THANKS & Keep using Fixya

the chat application has issues, you can uninstall it and reinstall it under your profile settings. (On the top over to the right where it says your name in the blue bar, its to the right of that has a menu popup and you want application settings)