I have computers with XP through 11, mostly to support friends and family.I wouldn't be surprised if they were still running XP....
Not free, the cost is factored into the service charges. I do Tracfone, $125/year for service plus the occasional $5 for extra texts.But basic Android with basic features and even last generation iPhone available for the low cost of $0.00.
My usual upgrade method is to buy the cheapest Samsung from QVC or HSN for less than that but it comes with a year so they are paying me to get a new phone.
My issue is that I like mine because it's smaller with features like a memory card slot and removable battery. With each iteration they take away more control. And don't even get me started on Apple.
Having said all that, I am mildly infatuated with the little Z Flips ...