After a two-year review, the Iowa Utilities Board is forcing companies that provide phone service for county jail inmates to lower rates from as high as $1 a minute to a quarter or less. Once all the new tariffs are approved, the savings to Iowa families with jailed loved ones is expected to be more than $1 million a year, according to the Prison Policy Initiative, a national nonprofit advocacy group that has been working in Iowa and other states to lower jail phone costs.