With the unlimited plans - there's the per line charge. Does this negate the per line charge and data charge on my current sharing plan? Meaning, I currently pay a line access fee, plus a data fee. Would I continue to pay for the line access fee in addition to the fee for the unlimited plan? Or does the fee for the unlimited plan cover line fee and data, then you add on your device payment amount, etc...?
Your line access fee is included in the per line fee for unlimited data.
Your total cost would be the cost of unlimited data plus any device payment, if any, plus taxes.