I have an Otter Defender. I loved the case for my iPhone but the one for the Z10 covered too much of the bottom where you start your swipes. I had to take off the screen protector and then I filed off 4-5 mm off the bottom part of the plastic, formerly covering the logo. I have about 3/4 of the Blackberry logo height showing. This is acceptable, but so much smoother swiping without a case. I bought a big battery with a new back, so I'll be caseless from now on.