Receiving a silent treatment from girlfriend after standing my ground with her, should she be the one to talk to me?

This is day 3 of hearing nothing from her. The other evening I was texting with her, she had gotten a new phone with a new number, we were texting on he old number. She hadn't been sure of getting an iPhone or android, which I had recommended iPhone, just my personal preference. I asked her what she got, she told me she got an android because the salesman told her the iphones had a lot of problems, and he gave some story about her old number getting hacked so she got a new number. I told her that the main problem was a battery drain issue, and that a nice thing about the iPhone is that it really can't be hacked into or get a virus.

She told me whatever, that I'm always right, so why don't I just go and work for the cell phone company. Said that the salesman didn't have a reason to lie to her.

I was offended at it, tired of her giving me that "whatever" type of text, but rather than fight, I told her I wasn't saying what was right or wrong, only saying my preference, and was only doing it for the sake of conversation with her. To put a stop to the subject turning into an argument, I told her I was leaving it at that, and that I wasn't going to argue as I needed to study. Haven't heard from her since.

Is it right to expect her to talk to me? It seems as though she tries to pick fights, and why would someone do that?

If you're right, why is the line at the genius bar so long filled with people trying to fix their broken Apple products? I've had a Samsung for 4 years and it has never broken, never been hacked, and I can change my own battery. When you try to keep a 4 year old ipad - they eventually stop supporting it. And btw iphones have an 86% hack rate. I disagree with her on the fact that salespeople never lie. But I think her point is that you think you know everything. You didn't tell her the plusses and minuses or to go online to read forums about what she might like or not like about iphone vs. Android. You basically told her she was an idiot for not listening to you - coming from the world's biggest idiot. If you want to save the relationship, tell her you're sorry for acting as if you were smarter than her because only a dumb**** would spend $700-1,000 for a phone that will definitely break within 2 years and become obsolete in 1 year just so he can use imessage.

You call it standing your ground. I call it disrespecting her decision. Once the decision was made, you shouldn't have felt any need to state your opinion again, belittling her decision. Right or wrong, it was her decision to make. Yet, you had to argue and try to prove you were right and superior, and that gets very tiresome after a while. You should apologize.

She isn't mature enough to deal with differences of opinion. She sounds like one of those people who can't distinguish fact from opinion, so that when someone disagrees with her she thanks she's being told that she's wrong. She may never outgrow this rigidity of mind, so decide whether you can deal with her ongoing perception of conflict. I wouldn't, but, hey, that's only my opinion.