The number of mobile connections rose again during the third quarter, according to the Communications Regulator, while data usage continued to skyrocket.
Meanwhile broadband penetration rose slightly, hitting 68.3% at the end of September compared to 67.8% a year ago.
The latest Quarterly Key Data Report from ComReg shows the number of fixed broadband subscriptions in the country rose 2% in the year to 1.42 million.
Meanwhile the advertised speeds of fixed broadband connections rose - with 86.5% of connections now promising speeds of 10Mbps or higher.
That is compared to 83.3% in the third quarter of 2017.
On the mobile network there were more than 4.96 million mobile subscriptions in the third quarter, excluding mobile broadband and machine to machine (M2M) connections.
That is 1.5% higher than in the second quarter and 4.3% higher than the population figure recorded in Census 2016.
When mobile broadband and M2M subscriptions are included the figure rises to 6.2 million - up 1.9% on the last quarter.
During the third quarter 106.16 petabytes (105,159,000 gigabytes) of data was transferred over Irish mobile networks - up 47.9% in the year.
When compared to the third quarter of 2015 data volumes have almost quadrupled, according to ComReg, as consumers have increased their usage of smartphone apps.
That saw SMS volumes fall 9.7% to 1.09 billion in the third quarter, with SMS usage down by a third (561.3 million) since September 2015.
MMS volumes were down 16.3% in the year, and at 8.2 million are also one third lower than three years ago.
But while users have been migrating to messaging apps like Whatsapp for their text and multimedia messages, traditional voice traffic has remained broadly consistent in recent years.
According to ComReg there were 3.1 billion minutes of voice traffic on mobile networks in the three months to the end of September - down on the previous quarter but up slightly year-on-year.
Since the third quarter of 2015, voice traffic is up 0.8%.
