This is just an one of the many lessons that iPhone Video Course teaches. Don't worry, you can watch a bit each day.
All those videos work with iPhone 3, iPhone 4 and iPhone 5 models.
Here's some of the stuff you'll learn:
Basics of iPhone
Calling and Messaging
Find Your Lost iPhone
Everything about your iPhone security
Setting Up an Email Account
Taking and Sharing Photos and Videos
and many more...
Business Functions and Working
Using Reminders and Notes
Follow Stock Prices
Printing with iPhone
Using Maps to Navigate and many more...
Entertainment and Troubleshooting
Keep Your iPhone Updated
Extending Your iPhones Battery
Read Books and Listen to Music
Track Your Trainings
Create Your Own Ringtones and many more...
iPhone Video Course Works on All Devices