The best replacement for telstra is optus.

The best alternatives to telstra are rated as following:
★★★★★  optus
★★★★  vodafone
★★★  optus cable
★★★  internode
★★★  tpg
★★  iinet
★★  optus 4g
★★  optus broadband
★★  optus coverage
★★  optus prepaid
★  optus mobile
★  bigpond
★  vodafone 4g
★  dodo
★  optus iphone
★  optus mobile broadband
  optus which is better
  optus 3g
  three
  optus iphone 4s
  optus mobile coverage
  optus adsl
  aapt

Your alternative for telstra is not listed? Suggest!
Speaking about telstra, one probably shouldn't forget about foxtel.

Other search terms related to telstra and their ratings are:
★★★★★ foxtel
★★★★ tcs
★★ tpg
★ nbn
★ next g
You have in mind a companion for telstra and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of telstra in all years. Click on graph for more.
telstra
optus
vodafone