You can find
verified sellers of valid Fullz (Full Info) in this section: "
Enroll, Fullz, Accounts, Logs, SSN/DL".
Fullz are usually sold without phone access.
You can add the desired phone number to the BG using specialized services or independently, based on a working method.
For example, you can read this thread:
In this article I want to share my experience of adding a phone number to the holder Background Report (BG).
Basically, I didn't come up with anything new - on this forum in the neighboring topic there is a free manual ID.ME, which already describes the ListYourself.net service, which allows you to list the holder's number by accepting a call with a code.
Accepting a call is not that easy. SMS number rental services are not suitable for this. Only in one place did I see the ability to receive voice messages on voicemail.
Therefore, I had to buy a smartphone with eSIM...