I can assure you nobody cares what phone you are using and nobody is assuming you are poor if you’re using an iPhone XR or 11. That’s ridiculous what you’ve written there. The corporate world is full of XR’s, 8+’s etc and nobodies wage packet is representative by the phone they are using. That sounds like your own insecurity to me.
It’s the lower classes and also school kids world that sees you as poor with what phone you use. Just like the clothes they wear.