If you’re in the market for a Galaxy Note 7 and want to make sure the unit you’re buying isn’t going to explode, just look for an “s” on the device’s label. It will also include a black square. The image was shared by Samsung’s Australian subsidiary and it’s not clear if the company is using the same tactic globally.
You can also use the marking to see if your already purchased unit is safe. If it doesn’t include that marking, you’ll want to seek out a replacement or refund from Samsung to make sure you don’t run into an explosion issue.