[AJFavish]

Excerpt shows they used non-government phones part of the time to hide their communications:

http://www.foxnews.com/politics/2017/12/13/ex-mueller-aides-texts-revealed-read-them-here.html

04/02/2016
Page – So look, you say we text on that phone when we talk about Hillary because it can’t be traced, you were just venting, bc you feel bad that you’re gone so much but that can’t be helped right now.

[EVO X]

Excerpt shows they used non-government phones part of the time to hide their communications:

I am venturing to guess, that raised some eyebrows since the Hillary investigation was still underway on Apr 2.