Why Cellphone Unlocking Could Soon Be Illegal Once Again
wired.com
wired.com
It was 1997. I'm pretty sure software and firmware was already in almost every device we own. But it's probably true that lawmakers had no idea.
The way the DMCA is written, it doesn't matter what is being "protected", it only matters that there is software that attempts to lock something down. Circumventing it, even if the locked "container" is empty, is illegal. And yes, it is breathtakingly draconian in its anti-consumer stance.
Make no mistake, DMCA is not about copyright or redistribution, even if that's what it says on the tin. It is about making it illegal to circumvent DRM, regardless of how or to what it is applied.
Does not mention where phone comes from, how many phones they tested, there is no independent confirmation...
Anyway my Lenovo comes with application firewall. We are yet to see something like that from other makers :-)
To your original point, I think it's better to buy an unlocked phone from the start. Subsidized phones will always have more strings attached.