Vodafone Ireland is to invest €500m in its network over the next five years.
The company said the investment will lead to improved call and text reliability and support the phased transition of Vodafone's entire 3G service onto its stronger and more sustainable 4G and 5G network.
The company has just completed a three-year €300m network upgrade.
Vodafone said it is also investing in "smart networks" programmes to reduce its energy usage.
Amanda Nelson, CEO of Vodafone Ireland, welcomed the fact that the company has been named Ireland's best network for the eighth consecutive year, winning a "Best in Test" award from umlaut, part of Accenture.
"We are thrilled to be receiving this award once again," said Ms Nelson.
"That said, our work is never done, and even in challenging times for the industry we are continuing to invest to futureproof our network using smart technologies and solutions," she added.
