I get it. You don't realize what "data" means:
noun plural
- Facts that can be analyzed or used in an effort to gain knowledge or make decisions; information.
- Statistics or other information represented in a form suitable for processing by computer.
- See datum.
Call records are data. They are facts that can be analyzed to gain knowledge and make decisions.
The linked article pointed this fact out. Now that you know what "data" means, you should understand.
No. It doesn't mean that he has all of it.
From linked article:
Washington — Federal investigators have gained access to White House cellphone records — including a phone used by former President Donald Trump — and could use that information as evidence in the special counsel's 2020 election-related trial, prosecutors revealed late Monday.
While it remains unclear exactly what prosecutors got their hands on and how much the White House cellphone records account for Trump's past online activity, according to special counsel Jack Smith, a technical witness who examined the phone for usage information "throughout the post-election period" might be called to discuss the data during the trial.
(my emphasis) C'mon. They have his phone from the WH (and that data is not personal; the Presidential Records Act makes it clear that such data is the property of the government) and can get from it what there is to get.
I'm just mentioning what the article says.
Special counsel Jack Smith has extracted data from the cell phone Donald Trump used while in the White House and plans to present evidence of his findings to a Washington, D.C. jury to demonstrate how Trump used the phone in the weeks during which he attempted to subvert the 2020 election.
In a court filing Monday, Smith indicated that he plans to call an expert witness who extracted and reviewed data copied from Trump’s phone, as well as a phone used by another unidentified individual in Trump’s orbit.
The data from Trump’s phone could reveal day-to-day details of his final weeks in office, including his daily movements, his Twitter habits and any other aides who had access to his accounts and devices. The data, for example, could help show whether Trump personally approved or sent a fateful tweet attacking his vice president, Mike Pence, during the Jan. 6 riot at the Capitol.
Jack Smith indicated that he plans to call an expert witness who extracted and reviewed data copied from Trump’s phone.
www.politico.com
This data could be very useful to nail down what Trump's role in the Jan. 6 insurrection was.