Ericsson has won a four-year order to provide O2 in Ireland with new 2G and 3G network equipment, a Daily Mail report said.
The report said the contract included providing mobile softswitch and upgrading O2's access network with HSDPA.
Ericsson would also have the prime integrator role and would provide network deployment and systems integration services, the report said.
The deployment would start immediately, the report added.
O2 Ireland said it was the first Irish operator to launch a 3.6Mbps network, providing its 1.6 million customers with "the most advanced mobile network technology in the world."
No financial details were disclosed, the report said.