SMS Timestamps is a Cydia Tweak which will put timestamps on all of your Text Messages. Normally, Messages only shows timestamps incrementally and not on all of the messages you send and receive. This tweak will let you know the time and date of each SMS instance. Within the settings you can choose to have it only show on messages after 1, 5, or 10 minutes. SMS Timestamps can be found in the Cydia Store for FREE under the Big Boss Repo.