Prices going up is only true if you also let the specs go up

If you fix the specs and progress time then the prices go down considerably

Take the first Iphone which was $499 ( $776.29 if adjusted for inflation ) and try to find a currently built phone with similar specs. I couldn't find any that go down that far but the cheapest one I could find was the ZTE Blade L9 ( which still has higher specs overall ) then we are looking at over 90% price reduction