A: Factory Unlocked means that the phone isn't attached to any cell phone service and can be used with any service that uses a SIM card. However - sometimes (in my experience especially in the US) you need to inform yourself wether or not the internet (3G, 4G, etc) will work with your carrier.

An unlocked smartphone is a phone that's not associated with a particular wireless carrier. One of the benefits of this is that you can switch service providers anytime you want – like when you find a plan that gives you all the bells and whistles the pricey wireless companies promise at half the price.

They've made it super easy for you to look this up in your Settings app right on your phone. Go to Settings > General > About. This will bring up a page with information about your device, including the model name and number.

Samsung Group (Korean: 삼성; Hanja: 三星; RR: samseong [samsʌŋ]; stylized as SΛMSUNG) is a South Korean multinational manufacturing conglomerate headquartered in Samsung Digital City, Suwon, South Korea.