MIX blueberries, sugar, tapioca, lemon juice and cinnamon in large bowl. Let stand 15 minutes.
PREPARE pie crust as directed on package for 2-crust pie, using 9-inch pie plate. Fill with fruit mixture. Dot with butter. Cover with second pie crust. Seal and flute edge. Cut several slits to permit steam to escape.
BAKE at 400°F for 45 to 50 minutes or until juices form bubbles that burst slowly. Cool.
Make Lattice Top Crust:
Cut second pie crust into 10 (1/2-inch) strips with pastry wheel or knife. Place 5 of the strips over filling. Weave lattice crust with remaining strips by folding back alternate strips as each cross strip is added. Fold trimmed edge of lower crust over ends of strips. Seal and flute edge. Bake as directed.