1
Go to the imo website to sign in using one of the supported, integrated messaging services. Imo.im currently only allows you to sign in using a username and password associated with one of several supported third-party services
2
Click a contact from your “IMO Contacts” list to start a new chat. This will automatically open a new conversation in the middle of your screen.
3
Enter text for your instant message into the text input field attached to the newly opened conversation.
4
Click the “Send” button next to the text input field to send your IM. Alternatively, you can press the “enter” button on your keyboard to send the IM.
RESOURCE : WIKIHOW