I have had Optus wireless internet for 3 months now and i have been so impressed with the speeds i have been getting, bragging to my friends how great Optus wireless internet is and then a few days ago it basically went back to the speeds i used yo get with ADSL 2, spoke with multiple Optus people on line and phone still waiting for a result, turned off, reset, followed all the prompts from there technician and still struggle to open a page on the web. We are now in to 2020 and i still cannot watch Netflix without it dropping out, kids complaining about there i pads and play station. Please has anyone out there got a fix to this problem? because Optus dont seem to have one
Sounds like you've covered most of these but you may find the help and support page useful: Slow Speeds / Dropouts - Mobile Broadband Troubleshooting
It also sounds like Optus are looking into it? Was a fault ticket logged?