Almost one million Australians have taken up the higher 50Mbps speed plan on the National Broadband Network, however some are still facing months of delays to connect to the network.

Since discounts were introduced for the 50Mbps speed plan on the NBN in late-2017, 26 per cent of customers have taken up this higher speed package compared to 4.6 per cent in December 2017.

NBN boss Bill Morrow said there had been significant take-up on the 50Mbps speed plan. Credit:AAP

Some telecommunications companies, including Telstra, upgraded their customers without charge to the higher speed plan.

NBN Co chief executive Bill Morrow said customers had mainly upgraded from 25Mbps plans onto 50Mbps with “less movement” from 12Mbps customers, at the NBN’s third quarter results on Thursday.