My experience, in supporting non-technical friends and family, is that if I mention "lock" or "unlock" they are going to say "no, I don't use my phone to unlock

My experience, in supporting non-technical friends and family, is that if I mention "lock" or "unlock" they are going to say "no, I don't use my phone to unlock my car". Many users only experience with a smartphone is to buy one from a phone store. The phone store employee is not likely to engage with the customer on the topic of "locked" or "unlocked", and the carriers have no incentive to train their retail agents to have that conversation.