refurbished Iphone
I bought iphone XS from third party my model number is starting with FT9K2ZP/A. Its a refurbished phone but can i use it? Is their any issue?
Sure. Why would there be an issue? There's nothing wrong with it being refurbished.
Refurbishes means apple took a iPhone for service, fixed it up to get it working as new, and then sold it again as a refurbished model.
Apple refurbished iPhones are indistinguishable from new when Apple sells them.