At it's face value this is indeed true. However, it is interesting there is no mention of Samsung then, right? Why would they be exempt from this recommendation, especially given Samsung phones are hundreds or perhaps thousands of times more prevalent than Huawei and ZTE phones in the US.
Shouldn't the argument from the FBI, CIA, and NSA be that US citizens shouldn't purchase any non-US manufactured phone? I'm skeptical as to the true purpose of the statement. This might possibly indicate that for whatever reason Huawei and ZTE don't play ball with the US when it comes to surveillance and the US intelligence agencies don't like it. If anything, this just raised the probability of me purchasing one of these phones. I'll probably stick with BlackBerry, but I will at least consider these next time I need to buy a new phone.