Switch my iphone from straight talk to verizon?

I have an iphone 6 plus on straight talk (prepaid) (not activated) and i want to switch it to verizon.Can i do that? Do i need to buy a sim card? or:I

I have an iphone 6 plus on straight talk (prepaid) (not activated) and i want to switch it to verizon.Can i do that? Do i need to buy a sim card?

or:I have an iphone 6 plus on straight talk (prepaid) (not activated) and i want to switch it to verizon.Can i do that? Do i need to buy a sim card?

or:i don't see why you couldn't change providers i think theres some perks that you would be elegible for there are sometimes three you would qualify for also i think you would need a sim card you can inquire about verizon might give you one i would check into that situation by calling or just go into a office and check i'm sure they have all that information

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