And I'm amazed that this shit still flies in the US, that consumers still haven't figured this shit out.
I've lived in the US for almost a decade now, and I've never had a phone subscription or bought a phone through a carrier. Always buy unlocked phones. Always get a pre-paid subscription.
If I buy a phone and don't like it, it's between me and wherever I bought the phone, and I can look up their return policy before I make the purchase.
If I don't like the carrier I'm with, I can switch the next month, and the new carrier will happily help me port my number to them for free.
Don't get plans. Don't get multiple "lines". Don't get family plans. They're traps. Expensive, annoying, traps that cost you time and money and hassle.