The iPhone keyboard will be debated for a very long time…some (like me) will love it, and have no complaints about using it. Others will hate it down to their very core. Such is the way of Apple products.
Regardless of how you feel about the keyboard, I think you’ll appreciate this tip.
When you enter punctuation, you have to hit the characters key in the bottom left of the screen. If you click that, then select your punctuation you have to switch back to the letters keyboard by clicking the appropriate button in the bottom left of the screen as well.
But…if you keep your finger pressed down after you click that characters tab, and drag your finger over to punctuation mark of your choice, when you lift your finger up, the keyboard will automatically switch back to the letters keypad.