There may be less to the burner phone angle than I first thought.
My interpretation of this is:
1. Strzok's wife found the burner phone
2. Page was offering a cover story as to why she and Strzok communicated by burner phone (so pro-Hillary talk couldn't be traced).
Can't be traced? I wonder if this brainiac Page is typical of the caliber of FBI agent; arrogant, but stupid.