I can’t stand the new lowercase keyboard in iOS 9. It’s a fairly useless change to begin with, as it doesn’t make anything easier.
Sure, it shows whether you’ve pressed the Shift key or not, but the new Shift key is also improved, making the lower-case option aesthetic rather than functional.
So, if you’re like me, here’s how to put that keyboard back to the way it “should” be.

Screen: Rob LeFebvre/Cult of Mac
First of all, drop into your Settings app with a tap and then go to General.
Don’t tap on Keyboard, yet, because this is (oddly) in the Accessibility section. Tap on Accessibility, then tap on Keyboard, which is in the fourth section down.
Once you’re there, you’ll see a toggle under Software Keyboards. Toggle that puppy to OFF and you’ll never have to deal with the goofy lowercase stuff again. Your Shift key will still work fine.
At least now you have the iOS keyboard you want, rather than the one Apple defaults.
Via: Daring Fireball