I never got why they would do that. I had multiple subsidized phones with a couple of carriers, which were never locked. The contract was post payed and a min

I never got why they would do that. I had multiple subsidized phones with a couple of carriers, which were never locked. The contract was post payed and a minimum duration applied. I get why they would lock a phone on a pre payment plan. But since you're anyway bound to the contract, post payed, for the duration of the contract why lock the phone in the first place? Nowadays I just get a phone at retail and be done with it.