There are more mobile phones than people in Ireland
Thousands of Irish people are on the wrong plan for their mobile phone usage.
There are more mobile phones than people in this country, and countless numbers of us have our faces buried in our phones on a daily basis.
But while we may be very fond of our mobiles, for thousands of people who are on the wrong payment plan they could be paying over the odds.
Bart Lehane, is a co-founder of the KillBiller app, that helps people tackle the cost of their phone bills.
"The general advice is to look and perform some sort of an audit on your usage", he told Newstalk Breakfast.
He says users should look at which networks they call the most often, and to see how many messages they send.
But he admits that "Finding the right bundles for you is the hardest thing".
In terms of competition, following the sale of O2 to Three, he says: "There is less competition, It's not atypical for a small number of big operators to exist in market".
But he believes the fact that there are less virtual operators in Ireland - networks that piggyback on another - such as Tesco Mobile or Post Mobile.
"They tend to focus on niche markets, and yes on average they would be a little bit cheaper than some of the bigger networks".
He told Newstalk Breakfast there are several things people can do.