Yes, I would buy a physical keyboard case for a Smartphone without a physical keyboard if the case was fairly price, and work well, and I plan on texting and typing a lot on the phone.
But, I probably just buy a phone with a built-in keyboard unless the phone I want does not have a keyboard.
I most likely prefer a slide out keyboard phone since I don't really like those keyboard phones which uses up half of the phone for the keyboard, and the keyboard is protected when it is slide back in.
A keyboard case might be good if someone gave you their old phone which did not have a keyboard, and you want one, but can't afford a whole new phone with a keyboard, but you can afford a keyboard case for the phone someone gave you, or your phone you want like Samsung Galaxy S3, Note ll, or iPhone 5 does not have a keyboard, but you need one.
I heard people with Blackberries which have keyboards are switching to iPhone, Windows Phone, and Android phones which don't have keyboards usually, so I think the Keyboard case might be useful for former blackberry users who are too used to the keyboard.
I went from a Blackberry Bold to an iPhone 3GS and at first, I doubted where I could go from the keyboard to a touch screen, but I snapped out of that after I used it. After about a week, I was fully used to it and haptic feedback is what made that possible.
