How to get your iPhone 4s to tell you when someone has read your message? - 1

On my ipod it tell me when someone read my messge and the time they read it. Does anyone know how to make it so my iPhone 4s does the same?

It is called "Read Receipt".
The person who you are sending messages to must have an iOS device, and they have to enable Show Read Receipts on their device.

In the Options, there should be an option from iMessage saying whether you want to turn in the read receipts. Do that.