Hey @Lyncee - that's quite a vast change between speeds!
Have you been provided with any fault reference numbers we could look into?
What NBN tech do you have? FTTN? How are you doing a speed test? Make sure they are over a word connection to the device, preferably a PC. Do you have one?
Unfortunately not. Each if the six help desk team members have just madr me oerform a hard reset and when that didnt work they have then asked me to perform another one then tell me they will change things 'their end' and get back to me.... its like a carbon copy conversation (they clearly just follow some documented steps ... then if things still dont work... their lost at what to do.
BTW. Not one of the six have got back to me yet. (Ive been trying since Friday to get this fixed.)
I have the hybrid connection. (Where the connection to my house comes through the old foxtel wiring.) Ive had it for about 12 months. No worries. Until now. Yes im doing the speed tests on my laptop at 1 to 2 minutes intervals..... so strange.
Ok based on your tests the issue would seem to be with the NBN itself (or a faulty modem). Optus should be able to run a series of speed tests from their end so request that (obviously stress a single test is likely not going to catch the issue though)
I'd be looking to have a NBN technician called in to test your line. It sounds like a fault in the lead in.
Only other test I'd suggest is sign up for a free 1 month sub on Netflix and see how that streams to your laptop. Make sure its at a high resolution setting.