I have a 660 phone.
I have kept an older plan that includes free unlimited
vision/web surfing.
I went to the Sprint store to upgrade to the MM-A920 phone.
Luckily the person at Sprint pointed out that Sprint Power Vision
will not be included free with my current plan. I will have to pay $25
per month to use Sprint Power Vision. He said that Sprint Power Vision
is not compatable with my old phone vision/web plan.
It is totally new and different.
I kept my old phone and plan for now.
Just be aware if you do have the older plan with vision that it will not be
included free under the new Sprint Power Vision plan.