You would have originally paid less for the phone or got it free with the contract. To allow the provider to be able to justify subsidising much of the cost of the handset, they load it with bloatware that will weld their brand to the handset and either force you to retain the contract or at the very least, have their brand laser etched into your eyeballs every time you look at your phone.
Is this aimed at me? I'm on a contract where I brought my own phone (form Apple, 3 years ago). Can't I just drop that Sim into a new Nexus 5X or whatever?
You would have originally paid less for the phone or got it free with the contract. To allow the provider to be able to justify subsidising much of the cost of the handset, they load it with bloatware that will weld their brand to the handset and either force you to retain the contract or at the very least, have their brand laser etched into your eyeballs every time you look at your phone.