A credit freeze doesn't stop you from using your credit, just accessing your history and opening new accounts. Some businesses use credit score to validate identity or in this case maybe it's one of those "free" phone deals you sign up for 2 years or whatever, which by extension is a loan. They wanna see if you've skipped out on other offers before they hand you a phone, doesn't matter if you bring cash or not. The few times I've unfrozen my credit it's pretty much immediate. I've done both online and via 800 number, the only trick is finding the PIN you haven't used for a few years. You lose that, and you're in for a long row to hoe to recover it.
Mark B.
Albuquerque, NM