[1] Amaysim, a mobile virtual network operator, has forged a new deal with Australian telco Optus that will see Amaysim deliver services on Optus’s 4G networks.
[2] In the new deal, Amaysim is expected to roll out the 4G mobile plans by Easter this year.
[3] Optus’s 4G network has been rapidly expanding across metropolitan and regional centers, and has moved from 2300MHz to 700MHz network coverage.
[Source] http://www.businessspectator.com.au/news/2014/12/19/technology/amaysim-forges-4g-path-optus