Optus this week launched its 4G network and offering in Sydney, Perth and Newcastle and announced services would begin in Melbourne from September 15.

Coverage, whilst limited will suit early adopters eager to get themselves onto 4G and enjoy it before the masses start moving across.

In Sydney, coverage rungs from Bondi in the east to Newington in the west and from La Perouse in the south to Dee Why in the north.

Perth gets coverage from Perth Airport in the east to City Beach in the west and from Como in the south to Innaloo in the north

Newcastle is well serviced, with outer lying areas such as Lake Macquarie and the Hunter Valley also getting coverage.

Melbourne, to be released on September 15 stretches roughly a 10-12km radius from the CBD covering all suburbs inside Brighton, Blackburn, St Albans and Fawker.

Telstra though, has had the jump on Optus for some time with Telstra having already moved a number of customers across to its 4G network, however 4G enabled devices are in small numbers at the moment.

In addition to its network launch, Optus also began taking pre-orders for what is said to be the most powerful 4G smartphone on offer, the Samsung Galaxy S III 4G.