Samsung most likely thought that they had a legitimate region for adding a region lock to the Galaxy Note 3. However, a lot of people, myself included, took offense to something like this. The gist of it was that all unlocked models of the device will still incorporate region locking to set of approved countries. Should you activate an unlocked Note 3 with a SIM card from an “unapproved” region, you’ll love the device. In this day and age, this shouldn’t even be something that’s standard in the industry.
You will need to have a rooted device in order to run this unlocking app, so make sure you’ve done that before installing it. As of the time of writing, this has been tested with the European Galaxy Note 3 (SM-N9005) and nothing else.