No one here knows whether the price of the iPhone will go up, or Apple will slash profits, or Apple will move manufacturing reliability from China. No one knows, and there is no point in speculating. What we do know is that iPhones are sold regionally, and I do not recommend you buy an iPhone outside your country of residence. The main reason is service, you will have to return to where you purchased the iPhone for service. It may not be available in your country. So you theoretically can use the iPhone in another country without a problem. But if you run into a problem with the iPhone, you’ll have even more problems trying to fix it.