Typically, no, actually. Take dumb phones before iOS came along, like on Symbian or Windows Mobile. Every carrier had their own App Store, their own awful SDK,

Typically, no, actually. Take dumb phones before iOS came along, like on Symbian or Windows Mobile. Every carrier had their own App Store, their own awful SDK, their own rules and approval processes, and 50% was the minimum share. It wasn’t just the apps either. It was the OS itself requiring carrier approval - something Apple managed to dodge through sheer clout, but that hereditary disease still plagues Android to this day.