Unless BB has a big special, I will never use them again to get a phone unless I buy it online. Using the store when I switched from AT&T to Verizon and them telling me they couldn’t approve me to switch due to it being denied on their system for credit reasons pissed me off. I went to Verizon and had no issues switching and my credit is perfect. Their staff usually don’t have a clue what they are doing either.
They did the same exact thing to me. They said I wasn't approved because of my credit, but I bought a house 6 months later and got the best rate available. My credit has never dropped below the mid 700's.