A:AnswerYes, these screen shields will work even with an Otterbox Defender case on the phone. The shields will lay as flat as can be on the screen if applied properly and you should see no difference in the touch sensitivity on the screen even with the Otterbox on top of it.
A:AnswerYes Best Buy always offers screen applications for a $7.99 service charge. The charge guarantees that they will have it on their with no blemishes or anything seen under the screen and if you're lucky, I've had associates in the past put them on just for purchasing the screen shield.