Signal does not come preinstalled on devices for them. He lied about that.
It’s not even approved for unclassified information that’s used in an official capacity.
The Biden Administration strongly denies his claim.
>Former Biden officials, though, said that Signal was never permitted on their government phones.
“We were not allowed to have any messaging apps on our work phones,” said one former top national security official on the condition of anonymity. “And under no circumstances were unclassified messaging apps allowed to be used for transmission of classified material. This is misdirection at its worst.”
https://www.huffpost.com/entry/trump-war-plans-signal-biden_...