Customers of the Three Ireland mobile network, who were formerly customers of O2 prior to its acquisition, are to finally get access to its high speed fourth generation or 4G network.

Three has announced that from July, the 1.5 million former O2 customers it acquired as part of the €850m takeover, will have free access for one year to Three's 4G network.

Former O2 Bill Pay customers will get access from July 1, with O2 Prepay following at the end of July.

After the one year promotional free trial period, which will be open to all Three customers, users will be charged €4.99 per month for accessing 4G services.

Following the completion of its acquisition of O2 in July last year, Three now has around 2 million customers in Ireland, making it the second largest mobile operator here.

But although the Hutchison Whampoa owned operator launched its 4G service in January last year, until now former O2 customers have not been able to use it.

In order to access the 4G service, customers will have to have a 4G enabled phone and run a quick software update, details of which are available at three.ie/4g.