Can i buy iphone 10 from USA and use it in india on an indian gsm carrier?

By paying the full amount will i get an unlocked iPhone which wil work in inda?I have my relatives living in us so is it possible that they can send me an unlocked iphone 10 and i can use it in india, because on the apple website under the carrier option Unlocked option is not coming. Plz help me..

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