[Verizon] Activation Issues (How do you do it?)

Hi. I'm in the process of activating a MXP on an unlimited Verizon line with a pre-programmed nano sim card that I got from a Verizon web chat.

Both the chat and phone technical help are saying that I cannot activate this phone because the account has unlimited data.

How do you activate this phone on Verizon with unlimited data? Her current phone is an GS3 that takes a micro sim card.

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jmooney