Telco handsets on installment deals
This has been a problem since smartphones came into existence. Manufacturers sell phones via networks and they in turn re-tweak the OS to a ‘branded experience’ which removes updates as well. They bugger up a phone and lock out swaths of settings/security options and really want the phone to last the contract term if you’re lucky but on their terms.
Mind you if they lock it from using certain app stores then maybe they are saving the users from more grief (from what I’ve seen the ‘droid stores are a mine field of uncertainty)