CAPS LOCK is sometimes necessary. If you want to use caps lock on an iPhone, iPad, or iPod touch, here is how to type in caps lock on the iPhone, iPad or iPod touch keyboard.
Turn on CAPS LOCK by double-tapping the shift key (iPhone and iPod touch)
Turn on CAPS LOCK by double-tapping the ship key or by tapping the two shift keys simultaneously (iPad)
All letters you type will be caps until you turn it off. Tap once on the shift key to disable CAPS LOCK.
Shift key will turn blue when you enable CAPS LOCK.