So I bought an optus sim few days ago with $30 recharge, checked on their coverage map that the house has 3g/4g reception, which it is listed as full coverage. Phone drops in and out of 3g with one bar, have tried multiple phones, walking outside…. spoke with chat support multiple times and then was also told the tower is under severe congestion and needs maintenance and it's just stiff shit.
Finally decided it's not fair and tried their chat support again to seek a resolution and the chat operators just keep closing the chat on me…
All mine were fine, activated in 10 minutes, great coverage, much better than kogan.