Yes, I meant a Nexus 4 without any protection. (Thanks for pointing that out!) So we agree that a 6-foot drop onto pavement will break a Nexus 4, probably with severe damage as a result.
Let's look at another scenario. The Nexus 4 in question does not have any protection.
A person is using their Nexus 4 as an alarm clock. The Nexus 4 is located on a nightstand that is 2 feet high. When the alarm rings, the person tries to hit the snooze button, but accidentally knocks the Nexus 4 off the nightstand. The Nexus 4 falls 2 feet onto a carpet. Do you expect the Nexus 4 to break?
In my opinion, the Nexus 4 could still break, but the damage would not be as severe as the scenario involving pavement. This is because carpet has a cushioning effect. The thicker the carpet, the more cushioning. Also, the fall is much shorter (2 feet versus 6 feet). So I would expect maybe a crack, most likely on the back. However, I would not expect a spider-web of cracks on the back. For the front, you may get a small crack, too. If you're lucky, the carpet will absorb most of the shock, and you may even have an undamaged Nexus 4.
To summarize, for a 2-foot fall onto carpet, I would expect:
- Possible damage to the back, but not as bad as a fall onto pavement
- Slight damage to the front if the carpet is thin, and maybe no damage to the front if the carpet it thick
Do these expectations seems reasonable?