Consider, Angelo, that she was standing there (we think) the whole time her friend was disrespecting you on the phone.
At any point, she could have taken her own phone back to talk with you, but she didn't.
It might be worth one more shot just to satisfy your own curiosity, but I'm thinking that she gave up the phone to her friend because she wasn't interested.
As you know, there are a zillion or two reasons why women give their phone number out without being truly interested in the person.
So, aside from thinking about your own
phone game, you might consider whether or not you had built sufficient comfort with this chick before getting digits.
Personally, I'm more inclined to move on if something like this were to happen.
There are quite literally millions of available women in the world.
Good luck.