A:AnswerApple iPhones can be used anywhere in the world where cellular service or WiFi is available. You need only to make sure you use the appropriate power adapter for the electrical outlets where you are in order to charge an iPhone, Apple Watch or iPad.
A:AnswerOS is operating system, but apples uses IOS. it's exclusive to Apple products that runs their hardware. it's not the same as OS. that's why you can only use apple products with apple products.