@Joseph-TP I have reset multiple times and checked passwords. I get as far as the 'Applying Settings' screen but when it gets to around 50% I get a 'No main network connection' screen. The extender...

@Dude136 Upgraded my NBN service today to Telstra Smart Modem 4 and same problem of RE705X not connecting. Spent nearly 3 hours trying to remedy. Very frustrating.