I think a response like, my phone is better than yours is a bit childish and not much of my style. I get what your trying to implement though. Take his annoyance with light heartedness.
I think I let him get to me when I tried to respond and came up blank. Oh well. It's not the end of the world. I want to dismiss him in a way that would make him red as hell from embarrassment and make me not look like a total ass. I could always rip on him about his insecurities.
Something along the lines of:
Why is it that every time I talk to HB 7.5 that you feel the need to respond and get defensive.
Anyone know/used anything extremely evil that flew past the radar undetected by the girl?
If you have let me know, I need to have it ready when he makes a comment and no one was talking to him.