Are there any costs to using MobileDay's conference calling service or call line? Patricia August 10, 2016 17:59 Updated Follow Nope, all MobileDay’s services are totally free. This includes our conference call line and the one-touch dialing app. Related articles What is My MobileDay Bridge? How many people can use my MobileDay Bridge? How can I add pauses to the sequence MobileDay uses to account for a cell booster or microcell? Which online meeting formats are supported by MobileDay? Comments 0 comments Article is closed for comments.