CHAT WITH BLOCKED USERS:
When someone blocks you, there will be no way of chatting him/her. Use this trick to chat with blocked users.
To do the trick, follow the steps below:
1. As soon as the person blocks you, do not close the chat window.
2. Take MENU and select INVITE USER option. Then invite anyone who is online into a groupchat.
3. You can now chat with him/her in the groupchat.
4. If a message saying "XXX is not online" appears, it means he/she is no longer online and therefore you can't chat with him/her for the moment.