Telecoms company Eir has announced that it is to invest €150m in upgrading its mobile network. 

The investment will result in 4G voice and data coverage extended to more than 99% of the land mass of the country. 

The company claims the overhaul will see its entire mobile network transformed over two years. 

Hundreds of additional mobile base stations will be added and existing sites without 4G capacity will be upgraded to it. 

Eir claims this network improvement will result in it having the most expansive 4G mobile network in the world. 

The investment will also see the roll out of fifth generation or 5G services in 2019, leading to much higher data speeds in the main cities here. 

Eir chief executive Carolan Lennon said the plan represents a significant investment in its mobile network. 

The mobile project is part of a wider €1 billion network capital investment programme by Eir over the next five years. 

Radio access network equipment will be supplied by Huawei, while Ericsson will continue as strategic partner for the core network. 

The news will come as a boost to Eir customers living in rural areas that are not served by high speed broadband.

It comes as the Government awaits the outcome of a review by the independent auditor to the troubled National Broadband Plan.  

Peter Smyth is examining whether the project has been undermined by contacts between former Minister for Communications, Denis Naughten, and businessman David McCourt, who is leading the last remaining consortium bidding for the contract for the plan.