Before we tackle that dastardly sticker, we bust out a spudger to remove the micro-SIM cover.

You could also use your fingernail to accomplish the same task, but spudgers are more scientific.

Alas! A liquid damage indicator cleverly placed below the micro-SIM cover thwarts our hopes of a Droid 4 deep-sea excursion. Sorry little buddy, looks like you're going to have to sit this one out.