> That they aren't even interested in that model is because they're in a Faustian bargain with cellular carriers to drive device renewals and post-paid plans.
I like your idea but in the US at least most mobile carriers actually don't encourage yearly upgrades as they force you into a multiyear contract for your phone to get "the best deal". In fact, currently both verizon and AT&T have 30+ month payment plans for phones so you're locked into at least 2.5 years. consequently, most people hold on to their phone for 3 years now.
I like your idea but in the US at least most mobile carriers actually don't encourage yearly upgrades as they force you into a multiyear contract for your phone to get "the best deal". In fact, currently both verizon and AT&T have 30+ month payment plans for phones so you're locked into at least 2.5 years. consequently, most people hold on to their phone for 3 years now.