Okay, I've elected to get the 4s on Virgin Mobile (US) for the long-term savings and a lack of a plan. The one thing that gets me is that a 4S from them is $650. The same phone unlocked from Apple is $550. I can't get the unlocked version and use it with Virgin Mobile, can I? My research indicates this likely won't work. I would just hate paying an extra $100 for a phone that will still be locked. Thoughts/advice? Any way around this?