It depends on what you have now.
An unlocked telephone manner the cellphone isn't always locked to a particular provider. When you buy a telephone on a price plan or a settlement, the telephone is locked to the carrier to save you you from skipping out at the bill and selling the cellphone. If you attempted to activate it on another carrier, it wouldn’t paintings. If you intend on sticking with your provider or buy your telephone without delay from the producer, it’s not simply something to worry approximately. It’s an awesome concept in case you do numerous visiting the world over or leap vendors lots to get an unlocked phone.
As some distance as your SIM card is going, that depends for your provider. SIMs are programmed for exclusive capabilities and yours likely isn't always programed to work in a cellphone so it's far unlikely to paintings. However, if you purchase a smartphone new it'll come with a SIM. If you don’t, just cross into your carrier and they'll give you one which works (assuming the phone works on their network) generally freed from rate.