iFixit

The slide-out keyboard on the numerically-named Droids is often the biggest selling point on the phone, filling a niche market for users who prefer the kind of physical response that only a tactile keyboard can deliver. After all, how are you going to send secret texts from under the table unless you can feel the keys you're touching?

The keyboard on the Droid 4 features the same offset key layout as the Droid 2 and the dedicated number row like the Droid 3.

Unlike previous versions, the Droid 4's upper display assembly envelops the entire lower half of the phone -- there's no lower lip on the bottom half anymore.