SimCorner Australia SIM Card (40GB, 28 Days) - Optus Prepaid SIM w/Unlimited Calls & SMS to Australian Mobiles - 3-in-1 4G Hotspot/Tethering Card: Standard, Micro, Nano SIM for Unlocked Phones

My visit to Adelaide was for two weeks and it was plenty for that and had a lot of unused data after my trip. I did not experience any slow down or dropouts and it worked pretty well for me.To activate, I was instructed to download their app and start the process. I made my activation at the airport in Australia, which I should have done beforehand when I had an internet connection in my home country. But I've managed to connect to the free airport Wi-Fi and get the process going.Once you're in the app serves as your account management tool. You can see the connected device, how much data you've used, how much data you have left, add more data, etc...Overall, I'm satisfied with the service. If I would have activated before my trip, it would have been a seamless experience.

These was so easy to start and you could choose the dates you wanted it to start which was a plus for me

Was a little worried it may be complicated or not work. Super easy no problems at all.

I could not activate this SIM card, they would not accept my passport info , so what was suggested is I wait until I get to Australia to activate this ...not ideal ....not easy. So I would suggest skipping this and get a SIM card once you are in country.