Thinking about having a friend buy an iPhone 4 in Australia and ship it over factory unlocked. I understand that it wouldn't be able to use the 3G network on T-Mobile, but everything else would be fully operational, correct? Would it simply operate on Edge? I have the old $6/mo for unlimited internet plan, and don't mind the slow speeds on my iPhone 3G. I have an iPad 3G with unlimited data as well for other things. Is this the best way to go about this? Really don't want to hop off the T-Mobile family plan.. $150 for five people, unlimited text/mms/internet and essentially minutes. Can't beat that. Are there better ways to get factory unlocked phones? How much would it cost? Thanks.