One of the missing features in the iphone messaging application is the sms counter.
The counter is used to tell you the number of characters you have typed before sending a sms, this is very useful because the number of characters in a single sms is limited to 160.
All phones have it except the iphone, BUT it is possible now to have it by following the next steps.
1- Launch Cydia
2- Search for SMS Helper (It is in the Big Boss Repo.)
3- Install the application and restart the springboard.
Finally notice the counter instead of the send button when typing!