Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B206 Safari/7534.48.3)
Very new aircraft have a "no electronic devices" instead of a no smoking sign. IME these tend to go off at either 10k feet or sometimes the same time as the seatbelt sign.