Unfortunately, there appears to be no way to turn this "feature" off; you simply can't get an unencrypted signal.

不幸的是，似乎无法关闭这项“功能”；无法得到未加密的信号。

youdao

But no. They show off some very poor raw data and then rush off to dilute the experiment a trillion fold and claim to see the same signal.

可是他们做了什么呢他们给你一些非常差劲的原始数据然后直奔稀释一万亿倍的实验而去然后声称他们观测到了同样的信号。

youdao

Interference from power lines when cycling. Shuts off after 5 minutes if no signal is received.

骑单车时与电力线干扰。5分钟没有信号就自动关闭。

youdao

The problems include no signal, people only being able to make calls during off-peak hours and voicemail failing to save and record messages properly.

BBC: Anger over 'poor' Vodafone mobile network in Marlborough

In fact, we had no problem getting a 4G signal, even in an outer borough like Brooklyn. (All bets were off when we went indoors, though.) When we were able to find LTE, we saw average download speeds of 15.52 Mbps, and average up-rates of 7.79 Mbps, with outlying scores of 7.02 to 25.66 Mbps down and 4.78 to 9.19 up.

ENGADGET: HTC One for AT&T and Sprint: what's different? Mobile