You can see the messages you have sent to and received from a particular contact in a single view, and continue the conversation from that view.
Select > Messaging.
Select a contact from the Conversations list. The conversation opens, and all messages sent to and received from that contact are displayed.
Reply to a message in a conversation
Select the text input field, and write your message.
To add an attachment, select .
To add more recipients, select > Add recipient.
To send the message, select .
The message is sent to the number last used for the contact.
When you send a new message, it is added to the current conversation. If no conversation exists, a new conversation is started.
When you open a received message from the home screen, by default, the message opens in the Conversation view for a particular contact.