From the article:
***But the NFL argues that not only did Brady not offer an explanation for why he chose that date to destroy the phone, but Brady’s own actions suggest it is not normal practice to do so.
According to the NFL, Brady did not destroy the phone used before the one that was destroyed and even made it available to investigators. Brady used this phone from the spring of 2014 to November 6, 2014, but it was still around when forensic expert Brad Maryman examined Brady’s electronic data in the spring of 2015.***
Interesting.