I think compatibility would kill this practice. Maybe LTE can bring this? If we could buy a phone from Europe, off Craigslist, a phone from ATT but switch to V

I think compatibility would kill this practice. Maybe LTE can bring this? If we could buy a phone from Europe, off Craigslist, a phone from ATT but switch to Verizon, etc., and not worry about carrier, we would start to question the contracts and pricing structure. There would be a huge demand for discounts (with the real threat of being able to take our phone elsewhere if they didn't comply) on non-subsidized phones.