yeah this one is kinda tuff...
if she whips out her phone in mid sentence and stuff, then maybe you didnt have a solid opening game (a1,a2,a3).
try being more interesting because it sounds like she got bored or something. For example, use a Neg and a DHV story early on in your game so that you dont bore her. and dont forget about your energy levels when you talk to her. have some enthusiasm when you talk, dont be a zombie

or if she was polite and pulled out her phone but said something like hold on or something, then use that to your advantage like:
G.L- theres something wrong with your phone!
HB- what?!?
G.L- (take phone) calls my phone with her phone
HB- giggles, happy, etc.
might not work because it sounds like an rAFC thing to do, but it seems to work with HB 6 or lower. field tested on HB 7+ and it doesnt work...yeah...
hope this helps,
G.L