Have three phones on account. Two are Droids, one is Samsung. They are used mostly at home so we keep them on wi fi usage as the owners watch a lot videos. However, and this is the second time this has happened, if the Droids leave the wi fi connection and switch to verizon tower, when they return to the wi fi zone, they do not switch back. The samsung does. Now I have to monitor the two phones for 12 days. Took all our regular data plus our build up of carryover. UGH. Any recommendations on how to fix this issue?