Samsung has conducted a “three-point bend test”, as well as a “human weight test” to prove how durable the Note 4 is. The latter test simulates the handset being repeatedly (hundreds of times) sat on by a 220 pounds (100 kg) person. Of course, the Note 4 bends in both tests, but it regains its initial shape with no damaging effects, according to Samsung. The handset maker says that the secret behind the Note 4’s durability is related to its metal frame (including a magnesium bracket) and a “mutually reinforcing structure between parts.”
Samsung didn't comment on the Note 4 hardware gap issue that we reported about a few days ago - likely because this is, in fact, a "necessary manufacturing feature" rather than an issue.
The Galaxy Note 4 went on sale at the end of September in South Korea, and will be released in 140 other markets around the world by the end of this month. In the US, all major carriers will offer the Note 4 starting mid-October.