Somewhere, someone is going to make this a thing. Only, it's not really a thing. So let's just get out in front of it here.
Bluebox — the group behind this "Master Key" scare — has an app that will tell you if the exploit is on your phone, or if it's been patched. Cool. But remember:
We're really not all worried about this. Here's the long version of why we're not worried about it.