People who have the newest smartphones and look like they don't have much money irk me.
Why does them having new phone irk you?
I want them to use old phones too.
It shouldn't irk you that some people have new smartphones because everyone can buy the things that they like. You shouldn't pay attention to what others have, you should pay attention to things that you have. You'll be happier that way.
But I don't have the money to buy the new phones.
Instead of envying them for having new phones, maybe you should consider your old phone as a positive. It demonstrates that you're more financially responsible than people who splurge on the latest phone.