It's got to be something relating to usage patterns. I've been buying the cheapest android phones my carrier supports and only upgrading them when my carrier f

It's got to be something relating to usage patterns. I've been buying the cheapest android phones my carrier supports and only upgrading them when my carrier forces me, and I never experience any slowdowns. On the other hand, I use almost no commercial apps, banking and finance being the exceptions. I use a few apps from F-Droid but the rest is just browser and basic phone functions. The phone I have now is a Nokia branded something, can't remember the model name but it's about two years old. As fast as the day I bought it.