Re: Updates
This OEM then ensure that the various networks toe the line in terms of updates and keeping crapware to a minimum
No, the networks are not involved AT ALL with iOS. They don't have the ability to install crapware or anything else on iOS, and all updates are delivered directly from Apple so the carrier has zero ability to control or interfere with you choosing if and when to update iOS.
The only thing the carrier controls on an iPhone is 'carrier settings', which you might see referred to in a popup once a year or so, or when you change carriers. Basically it is a small file that allows the carrier to specify stuff like LTE bands, roaming partners, carrier hotspots and so on. But since Apple controls the format and allowed content of the file, and it is not executable code, the carriers can only use it for the designated purposes and can't use it to mess with your iPhone. The only difference you might see if a few menu items in the Cellular settings go away for certain carriers or if your phone is SIM locked due to a contract. The carrier settings go away when you switch carriers via a new SIM and is replaced by your new carrier's settings.
Biting the hand that feeds IT
