Preheat oven to 425°F.
For Crust: Prepare pie dough as directed on package.
For Filling: In large bowl, gently stir together berries, sugar and flour. Spoon into pie crust and dot with butter. Place top crust over filling. Cut steam slits. Trim excess dough and seal edge. Style edge as desired.
Bake 40-50 minutes or until crust is golden brown and filling is bubbly.