>>1 Try talking to them about it, basically try saying what you wrote here, they might be able to understand. But if they don't understand then there isn't much you can do. Instead of fighting about it, just accept their opinions and get an iphone. Or you can say that you'll get a flip phone but you'll pay for it; something like that.
You sound like you love vintage, vintage technology is wonderful to collect, and even though you may not be able to right now, you can in the future, remember that. Keep your spirit of being old fashioned with technology but still remember to be modern about it. Although technology can be annoying, keeping up with the modernizing world is important to; so find your compromise :3 getting attached to electronics isn't all that bad, just don't let it become your life, I hope that helps :3